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This guide focuses on sustainable land management, which devotes more attention to the natural resources in the design of different land uses, and enhances the livability of our communities.
***The Pennsylvania Land Trust Asssociation did not develop this guide. The content is provided courtesy of the Pennsylvania Department of Conservation and Natural Resources and the Pennsylvania Recreation & Parks Society.***
In too many instances, parks, shopping centers, housing developments and other landscapes provide barren vistas of mowed turf grass, ornamental trees and pavement. Little thought is given to incorporating a more naturalistic setting into the design.
Research done at the Human- Environment Research Laboratory at the University of Illinois Urbana-Champaign has shown that more trees, wild-flowers, and other greenery in a neighborhood promotes a multitude of community and individual benefits. These benefits range from lower crime rates to stronger social ties, positive effects on health and higher test scores in children. The environmental benefits that come from an increase in trees, wildflowers and other native vegetation are also numerous: reduced flooding and erosion, air pollution filtration, air cooling and protection of biodiversity, to name a few. Sustainable development, which incorporates more native greenery along with other environmental considerations, improves the quality of life for the present without compromising the ability of future generations to meet their needs. A shift from the traditional grass and pavement landscapes that we are familiar with, to sustainable landscapes, not only improves the quality of the natural environment, but also directly benefits people and communities.
What does it mean to enhance natural resources? Well, everyone has a slightly different definition of nature. It can range from parks to backyard gardens to fields and forests. Nature can be small or large, nearby or far away, and can be closely managed or left to fend for itself. None of these is right or wrong, because all types of natural settings are beneficial to our quality of life. Enhancing natural resources and creating sustainable landscapes means that the flora, fauna and the habitats (including the area’s geology) they inhabit will be managed in a manner that protects them from disturbances.
By devoting more attention to the natural resources in the design of different land uses, the livability of our towns and municipalities will be enhanced. Sustainable land management may also help reduce some of the potential negative impacts of climate change: more native vegetation near buildings can reduce air conditioning costs, while trees along streams can reduce flooding impacts.
A sustainable community park or landscape, for the purposes of this guide, is one where the natural resources are protected, where wildlife habitat is improved and where human uses and maintenance practices do not harm the environment. Native vegetation is used whenever possible, and the use of turfgrass is minimized. Maintenance practices are chosen to reduce their impact on the environment, while at the same time save money. Landscapes that are managed to enhance natural resources and that use sustainable practices have been shown to have numerous benefits, some of which are highlighted below.
When people think of an area like their local park, the images that come to mind probably include ball fields, playgrounds, grassy areas and perhaps a few trees. While these places offer benefits to residents, such as exercise opportunities and a place to relax, they offer limited value to the environment, and can in fact degrade the local ecosystem through the maintenance practices that are used to keep everything green and tidy. The same may hold true for many residential developments, shopping plazas and industrial parks. The problems with maintaining these land uses with traditional methods are numerous. Maintenance can be very labor and resource intensive, thus costly. As stated in The Excellent City Park System: What Makes it Great and How to Get There by Peter Harnik, “It is so much more expensive to create and operate ‘designed’ landscapes (constructed parks and landscapes that are mowed or regularly cleaned up) than natural landscapes (those which are left alone, except for the occasional trail).”
The turfgrass that dominates most parks, yards and highway medians can require frequent mowing, raking, irrigation and periodic applications of chemical fertilizers and pesticides. The use of gasoline and diesel powered lawn equipment contributes to air pollution, sometimes of a greater magnitude than automobiles since the mowers lack the same emission controls that have been placed on autos. The use of this equipment contributes to smog conditions and ozone warnings, not to mention plays a large role in creating carbon dioxide that contributes to global climate change. Grass is typically mowed to the edge of ponds and streams, which can leave the bank unstable and foster a habitat highly suited towards nuisance geese. Even the noise from the mowers can disturb nesting wildlife.
When irrigation is used, the excess water travels over hard surfaces like pavement and can carry away fertilizers that could promote the growth of algae and invasive plant species. When pesticides are improperly used or disposed of, any excess pesticide could potentially reach drinking water supplies and could harm native plants and animals. In addition to maintenance practices, the design of these areas is not always helpful to conserving and enhancing the natural environment. Roads and parking lots fragment habitats. Plants are chosen for their looks rather than their wildlife benefits, and human uses like recreation and industry can degrade or eliminate habitat for most animal and plant species. Furthermore, a site’s geology and soils may not naturally support the chosen plants. So as development pressures rise, wildlife have nowhere to go, with all the turf yards, shopping plaza parking lots and freeways taking up all available habitat, creating an unbalanced landscape.
This guide is certainly not advocating for an end to all land use development, but rather tries to encourage developers, landscape architects and planners to incorporate more wildlife habitat, natural resource protection efforts and environmentally sustainable building and maintenance practices into their designs so that parks and other built landscapes work with their natural surroundings.
Native vegetation can provide flood control and storm water benefits by absorbing and storing precipitation. They can also store pollutants in their roots and stems, instead of allowing the pollution to end up in streams and lakes. Run-off, which is water that flows over the land into ponds and streams, can lead to flooding, which in turn may lead to property damage. The more native vegetation left onsite, the lower the volume of run-off and likelihood of flooding.In areas with large amounts of vegetation like parks and forests, the rate of run-off is estimated to be just 10 to 20 percent. Compare that to areas with large areas of hard surfaces like roads and rooftops, where the rate of runoff is 60 to 70 percent. The more native plants in an area, the greater the protection against flooding and water pollution. Developing sustainable parks, shopping plazas and industrial parks in urban areas can help revitalize failing or threatened commercial areas, thus bringing in revenues vital to a city’s success.
Improvements to parks and other green spaces may also increase tourism, an industry sector that contributes significant revenues to the Commonwealth, and is expected to increase over the years.
The biodiversity, or the variety of living things, in a municipality depends in large part on the quality of parks, forests, backyards and farmlands. When these areas are designed to minimize fragmentation from roads, and link to other green spaces, they are more capable of benefiting people, wildlife, environmental quality and the economy. Many species of wildlife need large tracts of land to find food, shelter and mates. Linked sustainable landscapes would provide pathways for wildlife moving from one area to the next, particularly in places where development pressures are high. Integrating parks, housing developments and other land uses with riparian corridors, wetlands and other natural areas will benefit wildlife and people throughout the Commonwealth.
As was mentioned previously, increasing the number of native plants in an area, where they can be supported by the geology and soils, would help prevent flooding events that can damage stream and rivers banks and destroy wildlife habitat. With the potential threat of increased flooding from climate change, this benefit is now more important than ever.
According to the U.S. Forest Service, just one tree can generate $31,250 worth of oxygen, provide $62,000 worth of air pollution control, recycle $37,500 worth of water and control $31,250 worth of soil erosion over a 50-year lifespan. So planting more native trees and other vegetation in a sustainable landscape can protect and enhance environmental quality, particularly when combined with the maintenance practices outlined in Maintaining Sustainable Landscapes below.
Scientists at the University of Illinois have discovered that time spent in nature relieves mental fatigue and the feelings of violence and aggression that can spring from it. Two groups of young adults were studied; one that took a walk through a nature reserve, the other took a walk through an urban setting. Performance on tests improved in the nature group, and they expressed less feelings of anger than the urban group. These observations can be seen closer to home, as well. A survey done for the 2009 Comprehensive Outdoor Recreation Plan (SCORP) found that over 80 percent of respondents visit parks to reduce stress and anxiety. Nearly everyone experiences mental fatigue now and then, and natural settings can provide great activities to relieve this fatigue. Natural resources provide many “activities” that require little to no effort, yet provide ways to restore a person’s health and mental well-being: viewing fall foliage, gazing at the clouds and watching squirrels climb trees. These are not “passive” activities, as some might consider them. They are active recreational activities in that they actively engage the mind. We all need to feel “away” at times, and areas that focus on natural resources and sustainability can provide that.
Researchers from the University of Illinois also found that areas with many trees, wildflowers and other vegetation help neighbors form social ties that create stronger, safer neighborhoods. The researchers found that roughly half as many quality-of-life crimes were reported in urban areas with high amounts of vegetation. These crimes include littering, graffiti and disruptive neighbors. Over 80 percent of SCORP survey respondents agree that “the availability of local recreation programs reduce youth crime. The creation of new parks, or the enhancement of existing parks, and the addition of trees to a streetscape, are some of the quickest and most effective ways local politicians can improve the image of their community.
The richer and more diverse a landscape is, the richer the learning opportunities can be for children. Particularly for children in urban areas, parks and schoolyards not only offer opportunities for healthy physical activity, but also provide a connection with the natural world. Recent scientific studies have demonstrated that natural areas have positive health impacts on development issues, particularly behavioral disorders like attention deficit hyperactivity disorder (ADHD). Health studies have also shown that contact with nature offers a range of medical benefits such as lower blood pressure and cholesterol levels.
According to the University of Washington’s Center for Urban Horticulture, a mature tree canopy can reduce air temperature by five to ten degrees, while the addition of blacktop and other hard, non-porous surfaces contribute to higher temperatures. The evaporation from one large tree can produce the same cooling effect of 10 room-size air conditioners operating 24 hours a day. Considering that more people die in summer hot spells than all other U.S. weather events combined, the public health benefits of increased native trees and other greenery in our landscapes, particularly when combined with a reduction in hard paved surfaces, is staggering. When you think about the possible negative impacts that climate change may bring—hotter temperatures, more unpredictable weather events—combined with rising energy costs, the importance of trees and their cooling effects become even more pronounced.
For instance, trees and other plants can retain carbon in their roots, stems and leaves, removing it from the environment where it may contribute to climate change. This is referred to as terrestrial carbon sequestration. It has been estimated that roughly 15 percent of total U.S. carbon dioxide emissions from the energy, transportation and other sectors are offset by the net sequestration by forests, urban trees and agricultural soils. In addition, trees have the capacity to remove pollutants like sulfur dioxide and nitrogen from the air, thus reducing the incidences of asthma and other respiratory diseases.
In summary, sustainable landscapes not only have tremendous value for the environment and wildlife habitat, but also for human health, safety and the state of the economy. When creating new, or enhancing old parks, housing developments and other landscapes, focusing more attention towards natural resource conservation and sustainability is a step that can improve the quality of life for everyone in a community.
The traditional landscape typically consists of turfgrass, with a few trees, shrubs and flowers interspersed throughout. The layout and maintenance of these areas offers limited habitat for wildlife, may require considerable inputs of water and nutrients to maintain, and can contribute to various forms of environmental degradation. Sustainable landscapes, on the other hand, focus on creating an environment that is beneficial for both human uses and natural resource conservation in both the short and long-terms. Ideally, it is in harmony with the entire environment, both above ground and beneath the vegetation and soils. More attention is focused on selecting appropriate native plants, on minimizing human impacts on the environment, and on selecting other methods that will preserve the community’s natural resources and character and improve overall quality of life. Later the guide will focus on the various components that make up a sustainable landscape, from identifying the area’s natural resources to managing for better wildlife habitat.
The following 12 suggestions highlight various principles to consider when designing and landscaping in a sustainable manner. Each suggestion could be used separately for an area that has a modest budget and staff, or the suggestions can be combined to create a landscape that protects and enhances all of its natural resources while still providing for human uses.
Pennsylvania has a wealth of wildlife ranging from black bears and Jefferson salamanders to gray squirrels and northern cardinals. Various land uses can protect the Commonwealth’s wide variety of animal species by enhancing existing habitats, and creating new ones. This will open up many opportunities for wildlife viewing, bird watching and other outdoor activities. In order to attract and retain wildlife, it is important to meet the four basic needs of all wildlife, which are described below. For further information on attracting wildlife, visit the Audubon Society’s Audubon at Home program website.
Some examples of native plants that provide food for wildlife include white pine, oak species, dogwoods, big and little bluestem grasses and New England aster. See Appendix 3 of Creating Sustainable Community Parks and Landscapes, 2nd edition lists additional native plants with wildlife benefits.
Native plants that include one or more of the following will provide valuable food for wildlife; fruits like berries and crabapples, seeds such as nuts or acorns, and nectar from flowers. The color of the flower can determine what types of birds and insects might appear. For instance, hummingbirds prefer red and orange flowers, while butterflies are attracted to yellow, purple, blue or pink. Some examples of native plants that provide food for wildlife include white pine, oak species, dogwoods, big and little bluestem grasses and New England aster.
Landscapes that contain lakes, ponds, streams or other water bodies have a preexisting water source for wildlife. These areas can be made more attractive to wildlife if riparian buffers, particularly ones made up of a variety of native tree species, are created around them. For areas without obvious sources of water, man-made ponds and wetlands could be created, or birdbaths could be utilized, in order to provide this necessity to the local wildlife.
Wildlife need places to hide from predators, raise their young and find shelter from harsh weather and temperatures. Standing and downed dead trees (snags) of various sizes provide habitat for over 35 species of birds, 20 species of mammals and numerous reptiles, insects and amphibians in the state,15 so consider leaving some of them in the landscape unless they pose a hazard to property or human safety. More information on snags can be found in the Penn State Cooperative Extension publication Dead Wood for Wildlife.
The size of an area needed for food, water and cover will depend on the species of animal. The more a landscape can be left in a natural state, the more wildlife that may be attracted to the area. Human use areas should be arranged in such a way as to maximize the connectivity between natural habitat areas.
Wildlife corridors are used to connect two undeveloped habitat areas that are isolated from one another. Forming partnerships with nearby counties, townships or municipalities to connect several local parks by a corridor would be a great way to expand wildlife habitat regionally. Wildlife bridges are another way to ensure that habitats are not fragmented (and to reduce the number of animal-vehicle accidents). Wildlife corridors will become even more important in the future as animals and plants try to shift their habitat range due to climate change.
Maintaining a landscape, whether it is in a park, residential area, shopping plaza or school, can use up large quantities of water. Determining water budgets, a topic that will be described below, can help define sustainability in terms of overall water use and impacts. Water uses can range from irrigating turf fields to filling up swimming pools to flushing toilets. With higher water consumption comes higher water bills and less water available for the natural resources, including the plants and animals. This section offers suggestions on how a sustainable landscape can reduce its water use and preserve water resources in a manner that will be beneficial to humans, wildlife and the environment.
A water budget quantifies all the water flowing into and out of a defined area, such as a watershed or a local park, over a fixed period of time. A water budget looks at precipitation rates, the infiltration of water through the soil – which depends in large part on the amount of non-porous surfaces like roads – evaporation, and the various water users in the area.
A water budget can show how much water will be needed for things like restrooms, drinking fountains and irrigation, versus how much water is available. The amount of water being used will depend on factors such as the efficiency rating of faucets and toilets, the time of year (water use is typically higher in the spring and summer) and a whole host of site-specific conditions. The amount of water available will depend on precipitation rates, groundwater levels and stored water. To learn how to create a water budget, visit http://waterbudget.sustainablesources.com.
Knowing the amount of water in an area will help to make decisions on how to use and preserve water resources. A sustainable landscape will ensure that human uses of water do not negatively impact the water available for wildlife, plants and the environment. The use of low-flow toilets, soaker hoses instead of sprinklers for irrigation and checking for leaky pipes can all help reduce water waste. This can not only save money in the long run, but also ensure that water remains available for other water users, including wildlife and plants.
Another option is to reuse graywater. Graywater is any water that has been used in a home, park or business setting (except from toilets) that can then be reused for things such as irrigation, mixing with herbicides and in commercial toilet flushing. Graywater reuse has many benefits including a reduction in fresh water demands and the cost savings that go with that. There are many strict guidelines to follow when using graywater, however. If graywater is to be used for irrigation, it will have to undergo secondary treatment followed by filtration and disinfection. These processes may be cost-prohibitive for a single business, but a collaboration between local businesses or municipalities might make it affordable. Before starting anything, consult the technical guidance and permitting materials available through the Department of Environmental Protection (DEP), www.dep.state.pa.us.To learn more about graywater in general, visit www.graywater.net.
Stormwater may be captured and used for irrigation purposes as well. Rain barrels or cisterns attached to downspouts will collect rainwater from roofs for later use. The EPA estimates that one 55-gallon rain barrel can save homeowners 1300 gallons of water during peak summer months. Reusing this rainwater instead of letting it run into storm drains may also protect the environment; many communities have combined sewer overflows (CSO) that can dump untreated wastewater into streams if flows get too heavy after a storm.
Riparian buffers are areas of vegetation alongside streams and other bodies of water. Thousands of miles of riparian buffers in Pennsylvania have been degraded or lost over the years, due to development.
These losses are damaging to the environment because buffers offer many water quality benefits for people and wildlife. Riparian buffers mitigate floods, recharge groundwater, prevent erosion and sedimentation of the stream, trap pollutants within plant roots and improve aquatic and terrestrial species habitat. This is accomplished in several ways. Riparian buffer plants slow runoff from precipitation and allow it to infiltrate into the soil. This settles out sediment, nutrients and pollution before they can reach the stream.
Forested buffers have the greatest filtration capacity; these buffers can absorb 10 to 15 times more water than turfgrass areas. Studies have also shown a 30 to 90 percent reduction of pollution and excess nutrients in surface and groundwater that have passed through a forested buffer.According to research done by the Stroud Water Research Center, forested streams in Eastern Pennsylvania were able to remove 200 to 800 percent more nitrogen pollution than non-forested steams. The trees found in forested buffers also help to regulate the water temperature of a stream by providing shade. The higher the water temperature, the more likely algae and aquatic nuisance plant species are to grow. Dissolved oxygen levels are reduced as temperatures increase, and this can lead to increased mortality of aquatic wildlife. Trees provide leaves and woody debris that are used by aquatic life for food and habitat. Forested streams tend to be wider and slower moving, helping reduce the impacts of flooding downstream.
While trees will provide better shade in riparian areas than grasses and other vegetation, any buffer is better than none at all. Using a combination of trees, warm season grasses and other native vegetation in the riparian buffer will not only protect the water body, but also provide a variety of habitats for both aquatic and terrestrial species. Stroud Water Research Center suggests the use of eight to 10 species in a buffer planting to restore a wide range of stream functions.
The quality of the riparian buffer and its wildlife habitat increases as the size of the buffer increases. Riparian buffers 100 feet wide or greater on each side of the stream are very effective, but buffers under this width will still provide some value to habitat quality and environmental protection. Buffers with a width of 100 to 300 feet on each side provide the most significant benefits to wildlife, but dedicating that much space may be a challenge. Deciding on the width of the buffer will depend on many factors, including the quality of the water body for human and wildlife uses, the extent of the floodplain, the degree of slope on the banks and the amount of land not already devoted towards some other use. In any case, as much land as possible should be devoted towards the buffer.
Riparian buffers are a new concept to many people, and the appearance of the buffer is something to keep in mind prior to its creation. Care should be taken to ensure that maintenance crews do not accidentally mow or remove plants within the riparian buffer.
Visitors to parks and other public areas that have come to expect easy access to the stream will need to be educated on the importance of the riparian buffer. They should also be provided with a few well-marked access points to the water. Otherwise the visitors might see the buffer as a “weedy” nuisance and request that it be mowed down. This occurred in a housing development along the Turkey Run stream in Lower Southampton Township, outside of Philadelphia. Wildflower meadows and no-mow areas were installed to protect the stream from pollutants, which included droppings from hundreds of aggressive geese. An education campaign helped to gain acceptance and buy-in of the buffer from the local residents.
Federal money may be available to landowners with non-forested streams running through their property for the planting of riparian buffers. The Conservation Reserve Enhancement Program (CREP), managed by the USDA, is a program that rewards landowners for installing conservation practices like forested riparian buffers on their land. It offers up to 100 percent cost-share reimbursement for the installation, annual rent payments and cash incentives. It is a way to protect the environment while making money at the same time.
Just like riparian buffers, wetlands have a crucial function in the health of not just aquatic ecosystems, but terrestrial ones as well. Wetlands act as a natural flood control by slowing down storm water. They also recharge groundwater and trap sediment, fertilizers and pollutants before they enter the water cycle. Most of Pennsylvania’s wildlife spends some or all of their life in a wetland environment. And nearly half of all isolated wetlands provide habitat for federally listed species under the Endangered Species Act.
Unfortunately, more than half of Pennsylvania’s wetlands have disappeared since the 1700s because of development, agriculture and habitat degradation. Nowadays, less than two percent of Pennsylvania is covered by wetlands. Seasonal pools, also referred to as vernal pools or ponds, are small shallow wetlands that dry up at certain times of the year, making the pools inhospitable for fish but great habitat for many species like Jefferson salamanders and fairy shrimp.
Luckily, there are many ways that landowners can protect wetlands. Construction and other forms of disturbance should be avoided in and near wetlands. Filling in or building near a wetland can have negative impacts on the environment, and so, should be avoided at all costs. Keep roads, trails and buildings as far away from wetlands as possible. Another source of protection can come from planting riparian buffers around wetlands.
Sometimes protecting wetlands depends on protecting critical recharge areas. Critical recharge areas are typically large contiguous areas of land that allow precipitation and other surface waters to infiltrate through the soil to recharge the ground-water. Typically 80 percent of precipitation infiltrates through the soils in Pennsylvania, and plants then take more than half of that water up.
The rest of that water feeds wetlands, streams and drinking water aquifers. Without this constant recharge, periods of drought could leave streams and wells dry, thus affecting available drinking water and wildlife habitat. An estimated 37 percent of Pennsylvanians get their drinking water from groundwater wells, so it is imperative to protect these critical recharge areas. Developing a sustainable community park or other passive land use in a critical recharge area is one way to ensure that the area is protected from the large areas of hard, non-porous surfaces like pavement and the pollution that can come from traditional forms of development. If your land is located within one of these recharge areas, care should be taken to minimize the use of synthetic fertilizers and pesticides, reduce the amount of roads and parking lots, and increase the area covered by native vegetation, to ensure groundwater protection.
How do you know if your land is located within a critical recharge area? Several factors contribute to an area being designated as such: groundwater is the primary source of water in the area, adequate groundwater flow is required for aquatic organisms in a nearby stream, there is little to no existing groundwater contamination, the area is at risk from development or other land uses and groundwater conditions will remain high quality if protected.
The underlying geology and soils of the area also play a large part in the effectiveness of precipitation recharging back into the groundwater. To find information on the groundwater and recharge rates in your county, visit, www.dcnr.state.pa.us/topogeo/groundwater/gw_data/index.htm.
Stormwater is all the water that accumulates from precipitation on land and can include runoff from the built environment (i.e. roofs and roads). Traditionally this water was treated as a waste product; people wanted to get it off their land as soon as possible. Gray infrastructure was typically used, consisting of drains and underground pipes that send irregular, high velocity water flows into natural bodies of water, along with high loads of sediment and pollutants, which can negatively harm wildlife and their habitat. Natural stormwater systems, on the other hand, treat this water as a resource, reusing it on-site and letting it trickle into the ground where it can replenish groundwater and remove pollutants.
There are several forms of natural stormwater systems, including swales, rain gardens and vegetated detention ponds. A swale (see left) is a gently sloped vegetated ditch where pollutants are removed from stormwater by filtration through native grasses and other plants.
Their design lends itself to roadsides and edges of parking lots, where oil, gasoline and salts can be trapped before reaching surface or ground water. Swales are a less expensive alternative than underground stormwater pipes and holding tanks, and they can provide wildlife habitat if the right plants are chosen. Properly maintained swales should drain completely within 24 hours.
This will reduce mosquito levels, as their eggs take 48 hours in water to hatch. Detention ponds are basins that act in a similar manner to swales but typically hold water for a longer amount of time. Both swales and basins should be planted with a variety of native plants to help absorb pollutants, provide habitat, and create an aesthetically pleasing site. The Pennsylvania Native Plant List is a collection of Pennsylvania plants that can be used in natural stormwater systems.
A rain garden is a shallow depression in the ground, filled with sandy soil and planted with deep-rooted native vegetation. The garden is situated in an area where it can receive runoff from hard surfaces like parking lots and sidewalks. The gardens slow down the speed of runoff and hold the water so it can naturally infiltrate into the ground. Rain gardens, like the one shown on the right, offer many benefits to the environment including the creation of habitat for birds and butterflies, pollution filtration and a decreased need for irrigation. The basic steps to create a rain garden are to (1) pick a location that has suitable soils for infiltration, (2) measure the drainage area, (3) draw a simple design, (4) choose the plants, (5) layout and dig the garden, (6) plant the vegetation, (7) and perform regular maintenance. For more information on creating rain gardens visit www.raingardennetwork.com.
Even just the planting of more trees near roads and parking lots can reduce the need for large, expensive stormwater management systems, according to the American Forests Urban Resource Center. The conservation group American Forests estimates that trees save U.S. cities $400 billion in the cost of building stormwater retention facilities.
|Tips for Natural Stormwater Management Success:
Another way to effectively manage stormwater is to minimize the areas of hard, non-porous surfaces such as roads, rooftops and parking lots. This can be accomplished through narrower roads, porous pavements and rainwater catchment systems on roofs. Non-porous surfaces do not allow precipitation to infiltrate into the soils, so there is less ground water recharge, which in turn can lead to less available drinking water. Precipitation flows quickly over non-porous surfaces and carries with it soil, valuable nutrients, pollutants and weed seeds. Turf that has been mown low to the ground also has a higher runoff rate than native vegetation, particularly on steeper slopes.
Without riparian buffers and natural stormwater systems, the pollutants end up in streams and lakes where they can poison aquatic life and encourage the spread of invasive species. The Maryland Department of Natural Resources has found that in watersheds covered by more than 25 percent hard, non-porous surfaces, only pollution tolerant reptiles and amphibians can thrive. When a watershed is more than 15 percent non-porous, it never has a “good” stream health rating, and even at 2 percent non-porous land cover, sensitive species like brook trout are never found. Brook trout are a cold water fish that are already facing environmental stresses in Pennsylvania, and are poised to be negatively impacted by the effects of climate change. They need all the protection they can get. It is essential to limit the area covered by nonporous surfaces and turfgrass within sustainable community parks and landscapes. By doing so, you will not only help protect water resources, but you also may save money in the process (Chapter 4 of Creating Sustainable Community Parks and Landscapes, 2nd edition describes cost savings from reduced turf and pavement maintenance).
Some hard, non-porous surfaces can be replaced by porous pavement, mulch, gravel or vegetation. There is a variety of porous surfaces available including asphalt, concrete, and grass and block pavers. Even porous athletic surfaces like basketball and tennis courts can be made (see photo left). These surfaces allow water to trickle through the material into the soil below. Benefits of these surfaces include no ponding of water and ice that can lead to accidents, longer product lifespan with proper installation and maintenance, and reduced need for stormwater management systems.
Cost savings can result from the use of porous surfaces as well. For instance, at Penn State University’s Berks Campus they installed 320 porous parking spaces in 1999. The University had budgeted $3500 per space for traditional paving yet it ended up costing them only $2700 per space when they used the porous pavement. That is a savings of $800 per parking space! Smaller projects may not reap quite so large a savings, but the economic and environmental benefits of porous surfaces will still be there. For additional information on the various porous surfaces, as well as other stormwater best management practices, visit www.dauphincd.org/swm/bmptour.html.
For those hard, non-porous surfaces that must be kept, like roads, their width should be minimized as much as possible. Paved parking lots should have just enough spaces for low-use times of year, with gravel or grass overflow parking for busier seasons. Turf should be limited to recreational areas (ball fields and picnic areas).
Turf in other areas can be replaced with native warm season grasses such as big and little bluestem or with wildflower meadows and shrubs. These plants have a higher rate of absorption, and provide many more habitat benefits, than do turfgrasses. Plus they require less frequent maintenance than turf once they have established. For more information on warm season grasses, see the Resource article Native Ornamental Grasses for Pennsylvania.
Soil compaction occurs when soil particles are pressed together, reducing the pore space where air and water typically can be found. If soil becomes too compacted there is no longer room for the air and water, making it more difficult for plants to grow and for stormwater to infiltrate through the soil into groundwater. Soil compaction can occur during building construction, from vehicle and pedestrian traffic, and from heavy precipitation.
To give you an idea of what compacted soil is like, consider that in undisturbed lands like forests the soil and its pore spaces have a density of 1.03 grams per cubic centimeter and a high infiltration rate of 15 inches per hour. The higher the density of soil, the fewer the air pockets and pore spaces present, making it more compact. The higher the infiltration rate, the more water that is able to percolate through the soil. On the other hand, soil in disturbed areas like parks, golf courses and residential neighborhoods can have a density of up to 1.97 grams per cubic centimeter and an infiltration rate as low as .04 inches per hour. Compare that with concrete which has a density of 2.2 grams per cubic centimeter and an infiltration rate of zero and you can see that there isn’t much difference between compacted soil and concrete!
What does soil compaction mean for a sustainable landscapes? Simply put, it can mean bad habitat because plant roots cannot spread through the soil, poor water quality from erosion, and increased maintenance costs to fix the soil’s problems and replace any plants that might have died. Therefore it is essential that compaction is avoided whenever possible. To do so, reduce the use of heavy machinery during construction and maintenance and discourage people from walking and biking off trail. If soil compaction is a problem in your area, tilling the soil and applying an organic fertilizer or compost may alleviate some of the problems and help plants to grow. Quality soil leads to better quality plants, so knowing what your soil is like before planting anything is imperative.
Building construction and maintenance might involve the use of many chemical substances, including chemically-treated wood for picnic tables and decks, synthetic fertilizers on turf areas, herbicides on weeds and window cleaner inside the buildings. In some cases, their use is justified and essential for proper maintenance. However, these chemicals may have negative effects on human health, the environment and wildlife habitat, particularly in aquatic ecosystems. The use of chemical substances should be minimized whenever possible. If alternatives exist that have less of a negative impact on staff health and natural resources, they should be used, especially in high quality habitats and indoors.
The U.S. Green Building Council (USGBC) developed the Leadership in Energy and Environmental Design (LEED) building certification program to verify that buildings or communities are designed for cost-savings, emissions reductions, resource stewardship and improved indoor environmental quality. Indoor air quality is affected by the various chemicals used in building design and maintenance and can affect staff productivity levels. The USGBC points to studies that show that workers in buildings that have “people-friendly” design and maintenance report productivity gains of up to 16 percent.
No matter what the chemical is, and what it is being used for, it should be used, stored and disposed of in an appropriate manner so that it does not cause harm to people or natural resources. By following the suggestions given in the following section, you will help ensure that aquatic habitats, natural resources and human health are protected and enhanced.
Many times the use of herbicides, insecticides and fungicides is the only way to remove nuisance and invasive species from an area. To minimize the risks these chemicals pose to non-target organisms and the environment, always be sure to read the label carefully and follow the directions exactly, in order to minimize the accidental use of too much chemical, using a chemical that is not approved for that area or applying it in the wrong way. When applying pesticides in or near a body of water, be sure that it is specifically formulated for use in aquatic habitats. To legally apply many of the pesticides available, you must be certified as a pesticide applicator. The Pennsylvania Department of Agriculture offers this certification.
Chemical fertilizers are sometimes used to keep turfgrass and other vegetation green, particularly in areas with poor soil quality. Problems can arise when these fertilizers are misused or after strong rains. Applying too much fertilizer can cause burnout of the plants. It also increases the chance that these extra nutrients will get washed into a water body where they could cause algal blooms and outbreaks of invasive plants. Chapter 4 of Creating Sustainable Community Parks and Landscapes, 2nd edition discusses alternatives to chemical fertilizers that could have less of a negative effect on the environment and may cost less money in the long-run.
Just like other chemicals, swimming pool chemicals can become dangerous when improperly used or stored. Dangers can include fires, toxic vapors and personal injuries. EPA's Fact sheet Safe Storage and Handling of Pool Chemicals provides additional information.
Alternatives to traditional pool chemicals exist that are more environmentally-sound, but they may be more expensive. These alternatives include saltbased sanitation systems, ionization and ozonation.
Until recently, most pressure-treated lumber contained a compound called chromated copper arsenate (CCA). This chemical protected the wood from rot and insect damage. However, in 2003 the Environmental Protection Agency (EPA) requested that these compounds be phased out of wood used for residential purposes and in children’s play areas because it found that arsenic in the wood raised the risk of several forms of cancer.34 Some wood playgrounds, picnic tables, park benches and decks were built prior to this ban and may have been leaching arsenic into the environment for years.
These should be replaced with composites, or plastic, vinyl or rubber “wood” whenever possible, and the soil in those areas should be tested to make sure it does not contain potentially dangerous levels of arsenic. For more information on arsenic and its potential health threats, see the Arsenic Compounds Factsheet.
There are other pressure-treated lumbers available that are treated with different chemicals such as ACQ and copper azole. Research into the environmental effects has so far been limited in scope, but studies show that they do not produce the dangerous arsenic byproducts that the CCA does. However, they still should not be used for bird and bat houses, or other structures that could be used by wildlife. For more information on CCA and other pressure-treated lumbers, see www.epa.gov/ingredients-used-pesticide-products/chromated-arsenicals-cca.
Traditional cleaning products, paints, varnishes and sealants may contain toxic or hazardous ingredients, such as Volatile Organic Compounds (VOCs). Some VOCs are toxic when inhaled or they may cause burns, rashes or cancer when they come in contact with skin. Janitorial staff face the greatest risks from the use of such chemicals, but all staff may be exposed to these products with effects building up over time.
To reduce the risks to human health and the environment, choose what are deemed “environmentally-preferable products.” A truly environmentally-preferable product includes ingredients that are certified to contain lower or insignificant amounts of toxic or hazardous materials and have low adverse impacts on the environment. There are many cleaning products, paints and other materials on the market that claim to be “green,” “all natural” or “environmentally-friendly.” How do you know that what they state is true and how can you choose the healthiest product for your employees and the natural world?
The national non-profit organization Green Seal uses science-based standards to independently rate products like cleaning solutions. They rate industrial and institutional cleaners, floor waxes and other products based on criteria like aquatic toxicity, eye and skin irritation and carcinogens. The LEED green building certification program recognizes Green Seal certified products and encourages their use in buildings wishing to obtain a LEED rating. For additional information about Green Seal go to www.greenseal.org.
The Pennsylvania Governor’s Green Government Council has developed a “Green at Work Guide” that not only discusses the purchasing of environmentally-friendly cleaning products but also covers the topics of recycling, travel and the purchasing of office supplies and furnishings. This document can be accessed at www.elibrary.dep.state.pa.us.
While an ideal park or landscape would equally balance human uses with natural resource protection and sustainability, this is not always a feasible option. Landscapes will typically have multiple uses, but multiple uses cannot take place in every part of an area without degrading the quality of wildlife habitat. Lands with good habitat, or near such areas, should focus more on sustainable uses such as natural resource protection, while sites with poor habitat potential can be used for human activities.36 But even in areas designed for human use, small steps can be taken towards improving and enhancing the natural resources and operating in a sustainable manner.
It may help to do a small “experiment” first in one area to see how staff or visitors react, and to see the benefits firsthand. For example, this experiment could involve replacing an infrequently used turfgrass area with a butterfly garden. Once this smaller project is completed, a more comprehensive and labor-intensive project could be done, such as planting a riparian forest buffer along all the streams. The next step could be to form partnerships with nearby municipalities to create a chain of high quality habitat sites throughout a region. This will be more effective at protecting natural resources than a single sustainable landscape would, since natural landscapes, and the high quality human uses that rely on these landscapes, are based on natural, not jurisdictional boundaries.
Chapter 3 of Creating Sustainable Community Parks and Landscapes, 2nd edition highlights the planning and design needs of a sustainable community park or landscape, condensing a lot of information into 5 simple steps. These steps do not act alone; they can be implemented at the same time as the others and you do not necessarily need to follow steps 1 through 5 in order. But taken together these steps will help guide the design of a successful sustainable landscape.
The following few suggestions are for landscapes with limited time, staff or budgets. These options can be used alone, or in concert with one another, to make a land use that is more sustainable.
Before any steps can be taken towards creating and managing a sustainable landscape, you will have to know what kinds of natural resources are found within the area. A natural resource inventory will help do that. A natural resource inventory is a list and description of all the characteristics of the land, including soils, bedrock, ground and surface water, vegetation and wildlife. The inventory could also include the built landscape (roads, trails, utility rights-of-way, buildings).
The following resource categories are typically used to define the natural environment in a natural resource inventory:
Natural resource inventories are made up of a map of the locations of all resources, a description of the relationships between resources, identification of the stresses and threats to the resources, uses affecting the resources, benchmarks to use when measuring future change and suggestions for the future.
The inventory should also include a Pennsylvania Natural Diversity Inventory (PNDI) search of the proposed site. PNDI is a project screening tool for locating species of special concern that may occur on a site. The tool is operated by the Pennsylvania Natural Heritage Program (PNHP), which is a collaborative effort between DCNR, the Western Pennsylvania Conservancy and The Nature Conservancy. The PNHP website, www.naturalheritage.state.pa.us contains more information on PNDI, and also contains downloadable county inventories for the entire state.
Inventories can be done by staff (if they are knowledgeable in geology, hydrology and biology), by a consultant or by an environmental organization experienced in conducting natural resource inventories. Inventories should be repeated on a regular basis to ensure that changes to the natural resources and the stresses on them are identified.
For parks or schools, you could hold a BioBlitz event, to complement the information in the inventory. A BioBlitz is a rapid assessment, over the course of 24 hours, intended to identify as many species as possible within a selected area. During a BioBlitz, scientists work alongside park staff, amateur naturalists and the general public to complete an inventory of the park. Holding such an event can be a great way to raise public awareness of the natural world, but there is a lot of planning and coordination needed for it to work successfully. To learn more about organizing a BioBlitz or to join a discussion group on the topic, go to www.pwrc.usgs.gov/blitz.html.
A natural resource management plan is a document that outlines the objectives for the area’s management and provides a list of actions for meeting the objectives. The plan is like a road map, directing you where to go next. The results from the inventory form the basis of the natural resource management plan. The structure of the plan typically includes the background information on the area (ownership, acreage, location, history of the property), the results from the natural resource inventory, management objectives, management recommendations, a timeline for upcoming construction and maintenance projects, and budget estimates for a three or five-year term. However, the plan should be tailored to meet an area’s specific needs, so the structure might differ somewhat from what is listed above.
Staff or hired consultants can write management plans. The decision on who should write the plan will come down to staff time, budget and the level of detail desired for the plan. However, if a consultant is chosen to write the plan that does not mean that staff can sit back and let the consultant do all the work. The more involvement staff has in the development of the plan, the easier it will be for them to implement it in the future.
Other stakeholders - like park visitors, home and business owners and others - should also be involved in developing the plan, as they are the ones who will be using the area and impacting its natural resources. For more on working with consultants for plan development, read the article Mental Models that Block Strategic Plan Implementation (http://conservationtools.org/libraries/1/library_items/1003). The most integral part of the management plan is the objectives section. Objectives are the short-term and long-term goals for the landscape.
To help determine management objectives for the landscape, there are many questions you can ask yourself, other staff members and visitors:
DCNR’s Bureau of Forestry has completed a statewide Resource Management Plan that can be viewed at dcnr.state.pa.us/forestry/stateforestmanagement.This document may provide you with ideas on how to complete a plan for your area, as it encompasses not only information on natural resources but also covers recreational uses and infrastructure. You may also want to complete an invasive species management and control plan to help prioritize a few of the most damaging species.
Once the management goals are established, determine what can be done to reach those goals. Management recommendations are the actions that can be taken to achieve the objectives outlined in the plan. These recommendations can be made for the area as a whole, or for individual segments of the landscape.
The recommendations will outline best management practices (BMPs) to use, along with a discussion of the expected results. BMPs can include where to plant native vegetation, when to mow or burn warm-season grasses and which herbicides to use, among others.
When the inventory and plan writing process are finished, and the outside stakeholders have had a chance to comment on them and feel involved, then work on the natural resource design and maintenance can begin. However, management plans should be reviewed on a five to 10-year basis to include new changes to the landscape, and to ensure that the suggestions are up-to-date. Natural resource planning in your sustainable landscape will be a continuous process if it is to be effective.
Rapid growth and development can present challenges to municipal governments statewide. Model natural resource ordinances can be created to give legal authority to these governments to direct development away from sensitive areas and quality habitat. Model ordinances can be written to cover a variety of topics such as zoning, stormwater management, landscaping, alternative energy sites and subdivision development, to name just a few.
The following steps provide staff or hired engineers and architects with guidance on how to design or enhance a landscape that focuses on sustainability and natural resource protection. Remember that any step towards natural resource conservation, such as removing invasive species, planting a few native plants that provide food for wildlife or reducing the amount of turfgrass, is better than doing nothing at all.
There is a saying, “If you don’t measure, you can’t manage.” It is very important that land managers know the extent of their natural and man-made resources: land, flora, geology, waterways, paths, buildings and roads. Mapping the area will help with visualizing what already exists, and finding the optimal locations for additions and enhancements. Some factors to consider when mapping out the landscape include areas of sun and shade, wind direction, slope of the terrain, moisture levels of soil, plants already growing in the area and soil type (sand, clay, loam). Also be sure to map out existing buildings, utility lines, recreational areas, parking lots and natural features such as streams, wetlands, brush piles and fields.
Keep in mind the land surrounding your landscape as well, because it can influence what should be designed within. For example, a neighboring property contains a stream and wetland that run adjacent to your property. It would be highly beneficial to keep human activities away from this section and instead plant a riparian forest buffer to protect the water quality and enhance wildlife habitat. Once this is done, map out what will be added to the landscape. This step in the process may have been done during the natural resource inventory phase. If that is the case, just review the map briefly to make sure any new structures and changes to the natural resources are included.
The addition of structures should be carefully thought out. Their placement should be in areas where they will not have a negative impact on wildlife habitat, geologic hazards, water quality or scenic vistas. A building should be oriented with its long axis in an east-west direction. The longest wall with the most windows should face the south or southeast, while the number and size of windows on the north and west-facing sides should be minimized because of the prevailing winter winds. This will help to maximize sun exposure and minimize winter drafts.
Structures should be designed to blend in with the natural surroundings as much as possible, instead of standing in stark contrast to them. For example, choose a color scheme that includes browns, greens and other neutral colors. Choose buildings that sit low to the ground and are arranged in groups, rather than being spread throughout the landscape. For instance, the visitor center and park office at Ricketts Glen State Park was built in a location that would connect it to existing trails and parking areas, rather than carve up excess land. The color scheme compliments the natural surroundings, rather than detract from it.
The use of “green” building materials is growing in popularity, and can help reduce a building’s impact on the natural surroundings. Green buildings are more energy efficient and take advantage of recycled materials and alternative energy sources, thus saving both money and valuable natural resources.
There are several programs that certify green buildings, the most well-known of which is the U.S. Green Building Council’s Leadership and Excellence in Energy and Design (LEED). LEED is an internationally-recognized program that provides third-party verification that a building uses sustainable practices like energy efficient lighting, alternative heating sources and water conservation measures. LEED can apply to new and existing residential, commercial and industrial properties. Buildings can earn a ranking of bronze, silver, gold or platinum, depending on the quality and number of sustainable practices in use. For more information about LEED certification, go to www.usgbc.org/LEED.
When laying out where your buildings should go, consider Low Impact Development (LID) principles. LID ties together sustainable land use with effective stormwater management. LID aims to preserve open space, minimize disturbances from development and protect water quality and habitat. It does this by reducing street widths, using green infrastructure like rain gardens, and clustering buildings to leave more natural area intact. LID methods tend to save municipalities money by reducing the need for costly infrastructure and it saves developers money by reducing grading and revegetation costs. These practices have been integrated into numerous municipal zoning, subdivision and stormwater management ordinances throughout the US. One of the case studies in Chapter 6 of Creating Sustainable Community Parks and Landscapes, 2nd edition also highlights some LID principles. For more information about Low Impact Development, visit www.lid-stormwater.net.
Once your buildings are in place it is time to think about the landscaping. The different species of plants used will have different soil nutrient needs: some thrive when the nutrient quality is high, while others prefer low nutrient conditions. For example, most of Pa.’s forests grow in low nitrogen soils. Using plants that can grow under the existing soil conditions can help save money because they will have fewer maintenance needs than those that require soil amendments such as organic fertilizers and supplemental irrigation.
Nitrogen, phosphorus and potassium are some of the macronutrients that plants might need. The pH level of the soil (whether acidic, basic or neutral) is also an important consideration because it determines which nutrients are available to the plants. Certain plants will grow only in acidic soils, while others will grow only in basic soils. Macronutrients are usually less readily available in soils with a low pH. The geology of an area is the key to soil types and chemical characteristics.
To find out the nutrient composition of the soil, a soil test kit can be used. Because soil conditions can vary from one area of a park to another, it is very important to test the soil in multiple locations, in order to determine the availability of nutrients and to figure out what plants to put where. Standard soil test kits are available from local Penn State University Cooperative Extension offices. These tests analyze the pH, phosphorus, potassium, magnesium and calcium levels in the soil. The analysis also comes with recommendations on how to improve the nutrient quality of the soil. More specific soil analyses can be ordered through their offices for an extra fee. To find the nearest Extension office, visit www.extension.psu.edu.
Particularly for human-use areas, it is also a good idea to know whether or not there are lead, arsenic and other toxins in the soil, since they have been shown to have negative impacts on human health, particularly among children and the elderly. These toxins sometimes occur naturally in the soils, or might come from human sources such as leadbased paints and metal ore smelters. For more information on planting in soils with these toxins, read “Gardening on Lead and Arsenic Contaminated Soils”.
If an outside contractor does your landscaping work, consider choosing a landscape company that uses ecologically sound practices. The Ecological Landscape Association (ELA), a nonprofit organization of landscape professionals, can be of assistance in locating such a company. Whether the work is done internally or externally, be sure to follow the guidance on native plants (see page 28) and use native plants whenever possible.
People like to see order, even though nature typically does not follow such predictable rules. There is a preference for coherence in a natural scene. Coherence occurs where trees, other vegetation and natural features are arranged in an orderly fashion with some repeated themes and unifying textures.
People also like to see a lot of complexity, or diversity, in their landscapes. Balancing these preferences with the desire to create as natural an environment as possible can be challenging, but not impossible. The key is to create a setting that is both visually appealing and useful to wildlife in terms of finding food and shelter. The diversity part will be easier, since nature abounds with diverse plants and wildlife. Choose a variety of native plants that offer food and shelter to wildlife, as well as provide colorful flowers and foliage. Coherence will in part come from proper siting and selection of the native vegetation. Planting in levels, where low-lying vegetation is arranged in the foreground, and taller shrubs and trees are in the background, can help with coherence. In addition, educating people on the value of “disarray” in the natural landscape will help them understand that nature is not always neat and tidy; and that is ok! Chapter 5 of Creating Sustainable Community Parks and Landscapes, 2nd edition will discuss how to go about the awareness process. Even small degrees of coherence and complexity will make people feel more welcome and comfortable.
The landscape and layout of the area can encourage exploration, which in turn can make people feel more familiar and comfortable in the area. A lack of familiarity can breed fear. Fears include being attacked by a bear or other dangerous animal, getting lost and coming across illicit activities. Obstructed views can help fuel these fears, so the landscape’s design should keep this in mind. Trails through sustainable landscapes should provide enough visibility for people to see what is coming up ahead. They should also be compatible with the natural surroundings, as studies have shown that this is what people prefer. Trails that go through open areas with little vegetation and distinguishable features are less preferred, but trails in dark densely wooded areas are not always looked upon favorably either.
A combination of open spaces and wooded areas appeal best to people while still providing wildlife habitat. Including some man-made elements in a natural area, such as walkways through meadows, bridges over streams and fences along trails, is another good idea. To strike a balance with the natural resources, these elements should be made of natural materials like stone and wood, and be designed to blend in with the surroundings as much as possible.
If you are looking for additional ways to make your landscape design more sustainable, look to the Sustainable Sites Initiative (SSI). This is an effort of the American Society of Landscape Architects, the Lady Bird Johnson Wildflower Center and theUnited States Botanic Garden to create voluntary national guidelines for sustainable land design, construction and maintenance practices. SSI is like “LEED for Landscapes;” it will set a standard for rating the sustainability of landscapes like LEED does for buildings.
In 2008, the SSI draft guidelines report was released to the public. The report details how a site can “protect, restore, and regenerate ecosystem services – benefits provided by natural ecosystems such as cleaning air and water, climate regulation and human health benefits.” Over 50 draft prerequisites and credits for site development are included, ranging from site selection to landscape maintenance. The Guidelines Report, as well as case studies and other resources, can be accessed at www.sustainablesites.org.
The Pa. Department of Conservation and Natural Resources (DCNR) is incorporating many of the SSI prerequisites into their Community Conservation Partnerships Program (C2P2) grants to ensure that state funding goes to local parks and land acquisition projects that are more environmentally-friendly. C2P2 grants are given to municipalities and non-profits each year for the acquisition, planning and development of parklands in the state. As part of the program, one “green park” applicant will win an award each year. Winners are chosen by how well they have implemented sustainable practices into their design and maintenance. For more information on this source of funding and the award program, visit www.dcnr.state.pa.us.
The selection and location of plants will rely in large part on the uses within each area. Items to take into consideration include people and vehicular traffic, recreation (active versus passive, group versus individual), storm water management, natural resource protection, aesthetics and wildlife habitat. Areas of human use will require resilient ground cover like drought-resistant native cool season turfgrass, whereas areas of low or no-impact use can be planted with native wildflowers, warm season grasses, trees and shrubs.
Plant selection depends on the soil, moisture, slope, climate, hardiness zone and light conditions in a given site. Planting a wetland plant (like marsh marigold) in a dry sunny area is a waste of time and money, as the plant will mostly likely not survive a season. By matching the plant type to the site conditions, the more likely the plant will establish and thrive.
Because the way a landscape is designed will determine the benefits it offers, including reduced pollution, food for wildlife or aesthetics, the design and plant selection process should be a thoughtful one. The process may be ongoing for several seasons, but careful planning upfront will make it much easier.
Native plants are those that have grown in Pennsylvania prior to the arrival of the first European settlers. These plants have adapted to the soils, pests and other conditions in the different ecoregions of Pennsylvania. An ecoregion is a geographic area with its own composition of native plants, soils and natural communities. Information on each of Pennsylvania’s 18 ecoregions can be found at www.dcnr.state.pa.us.
Using plants that are native to Pennsylvania is usually the best choice. However, it is better to grow a plant from your ecoregion but a different state, rather than use a plant from a different ecoregion in Pennsylvania. For example, it might be acceptable to plant a wetland plant from West Virginia in a wetland here in Pennsylvania, but it would not be appropriate to plant a shore grass from Erie in a city park outside of Pittsburgh.
Growing native plants by ecoregion is important because of the different geology and soils in each ecoregion. For instance, highbush and lowbush blueberries cannot be sustainably grown in an area of limestone terrain. You need to match the plant to the soils and geology that are found within your particular ecoregion.
Pennsylvania’s ecoregions may change in the near future, however, due to climate change. Whether climate change is occurring naturally or because of human impacts, it is widely accepted as truth in the scientific community, so we need to prepare for possible changes. When deciding which plants to use in your landscape, it is important to keep climate change in the back of your mind. Which plants would you choose if you knew that temperatures were going to rise over the next few decades or if you knew that less rain would fall over the spring growing season? These are just some of the questions to think about.
Through various modeling programs and monitoring of actual changes taking place, here are some of the possible effects of climate change to Pennsylvania that may impact the way our plants grow:
These changes will affect how much precipitation is available to water landscape plants and crops, while periodic heavy rains may scour the land, taking with it valuable nutrient-rich topsoil and any fertilizers that were used. As the climate changes it may become more favorable for some invasive species that can out-compete and chase out native plant and animal species (see next section). Due to climate change it is now even more important than ever to use native species in our landscapes, but which ones we choose may change with time.
One reason why using native plants, like New York ironweed, is so beneficial is that once they are established they tend to require less supplemental watering, fertilizer and other maintenance needs – assuming that they have been properly selected and planted. A list of plants that are native to Pennsylvania can be found in Appendix 3 of Creating Sustainable Community Parks and Landscapes, 2nd edition. These plants can be purchased from nurseries throughout the state. The Pennsylvania Native Plant Society’s website provides a list of these nurseries at the following website: www.pawildflower.org. Another great native plant resource is available through DCNR’s iConserve program website, www.iConservePA.org. This site will explain the benefits of native plants, go through the how-to’s, and provide other helpful resources.
While there are many non-natives that might work well in a landscape and not become invasive, they might not necessarily offer the same benefits which natives do, since our native wildlife has adapted alongside native plants and uses them as food and sources of cover. For instance, if you look closely at the wingstem photo to the right, you will see some native insects. Research has shown that native plants may support 10 to 50 times as many species as nonnatives. If nonnatives are used, make sure they will grow under the site conditions and offer benefits to wildlife.
Be aware that some native plants available for sale have been collected from the wild, thus threatening their populations. Be sure to ask where the plants came from before purchasing them. Something else to consider is the difference between perennials and annuals. Perennial plants should be chosen over annuals whenever possible. Perennials continue to grow for many years, while annuals typically only last one year. Maintenance costs are therefore lower on perennials, as they will not need to be replanted every year like annuals.
Planting times vary depending on the species, but they typically fall between September and October for trees and shrubs, and April through May for herbaceous plants. Planting during the summer months runs the risk of not having enough precipitation, while planting after October might not give the plant enough time to establish before the first frost. Planting during the wrong time of year could result in the death of the plant. Also, ensure that each plant is capable of growing in the hardiness zone of the area. A map of the updated hardiness zones in Pennsylvania (which takes into consideration climate changes) can be found in Appendix 2 of Creating Sustainable Community Parks and Landscapes, 2nd edition.
As has been stated earlier, planting native trees can have many benefits. Properly placed trees can act as a temperature buffer for buildings, thus lowering heating and cooling costs by up to as much as 25 percent. Trees on the north and western sides of a building will block cold winter winds, while trees on the eastern side of a building will provide shade from the hot summer sun. Two rows of evergreen trees are best for blocking wind, but five to six rows of deciduous trees will also work.
Trees can be purchased as bareroot seedlings, as containerized stock, as ball and burlap stock or as live stakes. Containerized and ball and burlap trees are more expensive than bare-root seedlings, however they have greater immediate visual impact and are less likely to be mowed down or damaged by wildlife. After five years, however, it is often difficult to tell the difference between trees that started in containers versus seedlings.
One way to protect seedlings from potential damage is to use tree shelters. Tree shelters are plastic tubes that can help seedlings grow and protect them from pests like voles and white-tailed deer. Shelters may increase the moisture available to the seedlings and block wind, helping the trees to grow taller, faster. They can also facilitate the application of herbicides and fertilizers to the area around the trees, helping remove invasive plants and grasses that could hinder the tree’s growth. Tree shelters typically cost several dollars each, but can be worth the cost to protect the seedlings in areas of high deer or vole densities, in areas that will be mowed, or in areas prone to flooding.
Shelters are not without their flaws, however. Bees and wasps may nest inside the tube and their honey may attract bears that can destroy the seedling. Too much moisture inside the tube can cause disease and rot. If the tube is not removed in a timely manner the tree may grow too large and get girdled, or strangled, by the shelter.
It is important to continuously monitor tree shelters for potential problems. You have invested considerable time and money into your trees; make sure they survive. For more information on tree shelter maintenance, visit www.stroudcenter.org.
The types of trees you choose will depend on your budget and the availability of the trees. The Tree Vitalize program website offers a wealth of resources and a variety of publications that can help you select and plant appropriate native trees. The site will explain the proper way to plant, prune and mulch trees.
A properly planted tree will grow twice as fast and live at least twice as long as one improperly planted. As some land managers say, “If you plant a tree high, the tree won’t die. But if you plant a tree low, the tree won’t grow.” When planting trees, do not dig the hole too deep. If you plant the tree at the proper depth, the tree will be less likely to die. If you plant it deeper, the tree may not grow because not enough oxygen will reach the roots. Also be sure to plant small trees at least five feet away from any buildings, and medium to large trees at least 15 to 20 feet away, in order to protect the building from tree roots and branches as the trees mature.
Within the next 50 to 100 years, Pennsylvania is expected to see average summer temperatures like what currently occurs in North Carolina or Georgia, with more 100-plus-degree days. Less snow in winter, an increase in summer droughts and more severe storm events are all predicted to occur in the state due to climate change.
Until recently, most work with climate change focused on mitigation. Mitigation involves reducing carbon and other greenhouse gas emissions in order to slow and ultimately eliminate the negative consequences of climate change. Climate change adaptation, on the other hand, involves steps to reduce our vulnerability to expected climate change impacts. Adaptation recognizes that even if all emissions of carbon ended today, the carbon that already exists in the environment will take decades, if not centuries, to disappear. Therefore, we will need to adapt the way we live and do business to cope with the expected impacts of climate change.
Sustainable community parks and landscapes should incorporate climate change adaptation into their planning, design and maintenance practices. How can this be done? Because of the uncertainty surrounding the future impacts of climate change there is no one tried and-true solution. However, some suggestions are outlined on the right.
Adaptive management, which is a set of processes tying together learning and management, can help a landscape manager deal with the uncertainties that come with climate change and adaptation. This management style attempts to determine how human interventions, like using alternative energy sources or controlling invasive species, may affect the environment (both positively and negatively).
Adaptive management can either be active — directly manipulating the environment to see how the different systems interact, or passive — forming a “best guess” idea of how the environment will respond to changes based on historical information. Regardless of which management style is chosen, adaptive management will help you to understand how the environment works in order to adapt and refine your management goals for the future.
The U.S. Climate Science Program suggests four steps for integrating climate change adaptation into park and landscape management:
All this may sound overwhelming, and in some ways it is. But we can take a proactive step towards protecting our sustainable landscapes through climate change adaptation. To learn more about climate change in Pennsylvania go to ConservationTools.org and search on "Climate Change". For additional information on climate change adaptation visit www.heinzctr.org and www.pewclimate.org.
Sustainable maintenance consists of any practice that protects the area’s natural resources while providing for some appropriately sited human uses. Maintaining a sustainable community park or landscape will be somewhat different from a traditional turf and pavement dominated landscape. For instance, those staff involved with maintenance may fear that a reduction in mowing needs will take away their jobs. However, while less time could indeed be focused on mowing, more time might be spent monitoring for invasive species and maintaining soil nutrient conditions. Maintenance in sustainable landscapes is just as important as in others because it shows that the landscape is being properly cared for, and not “abandoned.” A shift in the types of maintenance duties may take staff some time to get used to, and may require additional training, but it will in no way diminish the importance of the maintenance staff. Plus, it may save money in the long-term.
Keeping plants healthy depends in large part on the quality of the soil. There are many maintenance practices that can ensure nutrients remain in the soil, or are added as needed. The most important step is to retain as much existing soil as possible during construction and planting projects. The best option is to stockpile and reuse the existing topsoil instead of removing it. This soil must be covered by a tarp or non-invasive annual vegetative ground cover in order to prevent erosion by wind and precipitation. Using the existing topsoil not only saves money, but also minimizes disturbance that could encourage the growth of invasive plants.
Bringing in soil from somewhere else not only could upset the nutrient balance but could also introduce invasive plant seeds. Once invasive plants become established, they can be difficult if not impossible to remove. If fill materials must be used, try to use fill from other parts of the landscape that have the same characteristics, or from similar nearby sources. This will help minimize the chances of introducing a new invasive plant into the area and will reduce the need for costly shipping and the energy use associated with it. The use of certified “weed-free fill” may be the best choice, but these materials are not yet readily available within Pennsylvania.
Most native plants will not need fertilizer once they have established. When fertilizers are used, they should be of the organic or “slow release” varieties, should be used no more than once or twice a year and should be used in as small a quantity as possible. The use of too much fertilizer can burn a plant out, and the excess may leach into and pollute groundwater or other water bodies. Excess nutrients can also encourage the growth of invasive and nuisance plants. The Pennsylvania Department of Environmental Protection (DEP) provides some fertilizer guidelines at www.dep.state.pa.us keyword “non-point source management.”
To determine whether fertilizers should be used, soil nutrient levels should be tested every three years. Penn State Cooperative Extension offices can perform this service and provide guidance specifically directed toward the soil conditions in a particular area. They also have many publications at http://pubs.cas.psu.edu that can provide more information.
Here are some quick fertilizing suggestions:
Loam is soil that is made up of sand, silt, clay and organic matter in evenly mixed particles of various sizes. Loam not only provides beneficial nutrients to the plants, but also holds water more effectively than the soils typically found in developed areas like parks and homes. For more information on loam and soil amendments, read the Penn State Cooperative Extension publication, “Soil Management in Home Gardens and Landscapes,” at http://pubs.cas.psu.edu.
Nutrient uptake can be affected by soil moisture levels, soil physical conditions, nutrient balances and soil pH, so be sure to take these conditions into consideration before utilizing any soil amendments. In addition, nutrient requirements vary from plant species to species. Trees, especially, can have drastically different requirements than grasses and flowers. Tree nutrition experts, therefore, strongly recommend that an annual leaf or needle analysis be used in conjunction with a periodic soil test. This analysis can confirm suspected nutrient problems, identify nutrient stress before visual symptoms appear and offer suggestions on ways to fine-tune fertilization. Penn State Extension offices can provide these services as well.
Analysis is a valuable tool in diagnosing problems because once a tree is showing visual nutrient deficiency symptoms, such as smaller-than normal foliage, off-color foliage or general lack of vigor, it has been suffering for a very long time. Without the analysis, you might treat for the visual symptoms of a disease without getting to the underlying problems associated with nutrient deficiency. Trees are a costly expense; protect your investment with proper soil maintenance. Additional information about planting and maintaining trees is provided on the following pages.
Compost can improve the nutrient quality of the soil and help retain some of its moisture content. Compost benefits the levels of nitrogen, phosphorus and potassium in the soil. Compost is the result of a controlled process of decomposition, and can consist of materials such as grass clippings, dead leaves, shredded newspaper and manure from herbivorous animals (no dog or cat waste). While invasive plants could be composted, this should not be done once the plants have gone to seed, or for plants that spread through their roots (such as treeof- heaven and Japanese knotweed). You should also not use meat, dairy or oils in compost piles because of odor issues that could attract pests.
Compost can be made on-site, or can be brought in from a municipal composting facility (sometimes for free). For a list of these facilities, visit the Professional Recyclers of Pennsylvania (PROP) website at www.proprecycles.org. In order to make your own compost, you will need to have a compost bin. These can be purchased from many garden supply stores, or you can make your own out of a trashcan with holes poked in it, a cylinder of chicken wire or a square bin made from wood pallets. The Pennsylvania DEP provides more information on composting at www.dep.state.pa.us keyword “composting.”
The steps to composting are:
Compost should be warm and moist to the touch, but not soggy. To help keep odors down, the compost should be turned regularly to keep it aerated (every three days to six weeks, depending on the thickness of the compost). The more the compost is turned, the faster it will decompose. The compost will be ready after about two to four months, once it has fully decomposed. An easy way to tell if the compost is ready to use is to seal a small amount in a plastic bag for 24 to 48 hours. If there are no strong odors after that time period, the compost is ready to be used. When the compost is ready, you can either work in one to three inches of compost into 6 to 12 inches of topsoil into a new planting bed, or add one-quarter to half an inch of compost around existing plants. This should be done every spring and fall. This will help hold in nutrients and water and feed the beneficial soil organisms that aid in plant growth.
The use of mulch can do many things: retain moisture in the soil, moderate soil temperature, prevent erosion and the washing away of nutrients, and keep unwanted plants from growing. Mulch should be kept no more than two to three inches deep, because excess mulch can damage plant stems or prevent water from reaching the soil. Insects like termites, and small mammals, might be tempted to build their nests in deeper mulch. Be especially careful when mulching around trees (see the drawings on the right). The wrong way to apply mulch is to push it up onto the sides of the trunk like a mountain slope. The correct way is to make it look like a flat donut, where there is an inch or more of open space between the mulch and the tree trunk. If you do not leave a space between the mulch and the trunk the decomposing mulch can rot the bark and expose the tree to insect damage, disease and possible tree death.
Next to buildings, ensure that the mulch does not come near wood siding, latticework and doorframes, because the warmth and moisture of mulch can be attractive to termites. It does not matter what type of mulch is used, since the termites do not actually eat the mulch, but use it to protect themselves from poor weather conditions.
Once a year, preferably during the fall, remove the old decomposing mulch and add fresh mulch on top. If bare spots appear before that time, fill in those areas with new mulch. When mulch decomposes it can use up the nitrogen in the soil, thus taking it away from plants that may need it to grow. The quicker the mulch degrades, the more the nitrogen is used up. So whenever possible, choose a mulch that lasts longer, such as bark mulch.
Many different types of mulch are available, some of which are described below. Recycled mulches should be used whenever possible, because they not only cost less than virgin material mulches, but they reduce the amount of materials entering landfills and use up less natural resources in their production. Mulch materials should be certified “weed-free” whenever possible, to ensure that new invasive plants are not brought into the landscape.
Once you are certain that soil quality is at its peak, it is time to think about the other factors that affect the health of the trees and other vegetation that you have planted. Proper vegetation maintenance can extend the life of your trees, shrubs, grasses and perennials, thus protecting your investment.
If you use tree shelters to protect young seedlings there is maintenance involved. While properly installed and maintained tree shelters can ensure that trees grow up strong and healthy, an improperly maintained one can lead to tree death. In February and March of each year:
Herbicides may be applied around the tubes in in the spring and fall to reduce the threat of invasive plants and voles.
important step in maintaining healthy landscape trees and shrubs, but care must be taken to ensure that it is done correctly. Too many times people prune too much of a tree, leaving it exposed to disease and fungus. The biggest mistake inexperienced pruners make is to “top” a tree. Tree topping involves removing the top or crown of a tree. Many times this is done for trees under power lines or by people who want to save time by pruning the quick and inefficient way. Cutting off the top of a tree weakens it by reducing its ability to photosynthesize its food and exposes more limbs to insects and diseases. Topping can also reduce the value of large ornamental trees by thousands of dollars! Pruning should be done to trees with weak, decayed, or dead branches or trees that may damage property or human safety. When pruning involves climbing into the tree to cut branches, using chainsaws or cutting near utility lines, a professional should be called in to do the work. This will protect your safety and the tree’s health. To get the best results, look for a Certified Arborist. Your local extension office (http://extension.psu.edu/counties) or the International Society of Arboriculture can help you find a reputable tree company.
Standing trees that are completely dead or dying are called snags and they provide habitat for a wide variety of wildlife. Woodpeckers, salamanders, flying squirrels and mushrooms all rely of dead trees for their homes and a source of food. Some snags can be left in a natural landscape as long as they are not close to buildings, trails, roads or other areas where they may pose a risk to property or human safety. Human health and safety should always be the number one priority, but if you have assessed the area and determined that the snag poses no threat, consider letting it stand for the benefit of wildlife.
Traditional methods of maintaining grass can be very expensive and time consuming. The average landowner spends over $1000 per acre per year on mowing, fertilizers and herbicides for their turf lawn. The use of gas powered lawnmowers and synthetic chemicals may pollute the environment and harm human health. In a sustainable landscape the use of traditional turfgrasses is minimized as much as possible, saving time, money and protecting natural resources.
Sustainable community parks and landscapes may have two types of grasses, each with its own maintenance needs. Cool season turfgrass, a staple of traditional landscapes, should be limited to human-use areas such as ball fields and picnic groves. Native cool season grasses, such as Canada and Virginia wildrye, should be used in place of non-native cool season grasses like Kentucky bluegrass and tall fescue.
Turfgrass can be maintained in a more environmentally-sustainable way by mowing high (3 inches tall, not removing more than 1/3 of the blade of grass), mowing during the early morning hours, and leaving the grass clippings on the turf. Longer blades of grass help the roots grow deeply, which in turn will prevent erosion and help the grass obtain more water and nutrients from the soil. Mowing during the heat of midday can contribute to smog and ozone warning days.
Leaving grass clippings on the turf, or composting them, turns them into a natural fertilizer that will benefit the soil and the grass. If you do choose to leave the clippings on the ground, this process can be facilitated by removing the grass catcher from the lawnmower, and using a mulching blade that will chop the clippings into finer pieces than a regular mower blade. If you decide to recycle the grass clippings or leaves, locate the nearest yard waste recycling facility at myecoville.com.
Near stream, ponds and other bodies of water, do not mow the grass right up to the edge. A vegetative buffer around the water will help prevent pollution from entering the water, prevent erosion of the soil and provide wildlife habitat for some species, while deterring nuisance geese. Traditional turfgrass maintenance may require large quantities of water for irrigation, which is wasteful, both in terms of money and natural resources.
Geese can make being outdoors unpleasant when their droppings are concentrated at a site. These droppings may also contribute to high fecal coliform bacteria levels in lakes and ponds, making swimming unhealthy and potentially dangerous. Geese prefer flat, open, mowed grass areas and tend to avoid dense, high grasses and other vegetation. They need to be able to see if any predators are nearby; tall grasses make that difficult. To reduce the number of geese on beaches and shorelines, plant and maintain an un-mowed six-foot wide buffer of tall native grasses or a 20 to 30-inch tall hedgerow. Other methods of goose management - harassment by dogs, loud noises, chemical deterrents - have mixed results. Deterring geese naturally with the use of tall native vegetation is ideal.
Warm season grasses are the second type of grass that could be used in a sustainable landscape, and it will be planted for wildlife habitat and as attractive landscaping. Native warm season grasses include big bluestem (Andropogon gerardii Vitman), little bluestem (Schizachyrium scoparium) and switchgrass (Panicum virgatum).
These grasses have ecological benefits because they grow in tall thick tufts that offer food and cover benefits for wildlife throughout the year. The photo below shows a meadow of warm season grasses in Chester County, Pennsylvania.
To ensure that these grasses establish and continue to thrive, maintenance of these grasses will be more intense during the first several years after planting. However, time spent on maintenance will be considerably lower in subsequent years, especially when compared to the time spent maintaining other types of vegetation. The document, “A Landowner’s Guide to Native Warm Season Grasses in the Mid-South,” (www.utextension.utk.edu) provides information on establishing native warm season grasses. The guide states that some of the biggest problems that arise with establishing these grasses come from planting too deeply, planting too late in the season and having poor weed control. The best time to plant native warm season grasses is mid-April to early July, at a depth of ¼ inch or less.
Depending on what you are managing for, whether it’s mammals, birds, insects or a combination, will determine when and how often to mow native warm season grasses. Mowing prior to April 1 and after October 1 is acceptable for mammal and bird habitat. Mowing between those dates can have adverse effects on species breeding, nesting and rearing. But for insects, mowing during the end of summer and early fall can have a negative impact on their food sources and hiding places. For instance, mowing in September can destroy the common milkweed that monarch and other butterflies depend on for food and places to pupate. Therefore it is suggested that areas should not be mowed until after October 1 for insect habitat.
In terms of how often to mow, once every one to three years is fine for mammal and bird habitat, but for insects the rate is closer to once every five to 10 years, but mowing so infrequently can create weed problems. The best option for all wildlife is to have a rotational mowing mosaic, where some patches of grass are mowed in the current year, and then left unmowed for several years, while mowing takes place in other patches. This will ensure that there are always some older-growth patches available for wildlife, while still helping to deter the growth of invasive plants and slow the succession into forest habitat. For more information on growing and maintaining warm season grasses, visit http://www.cropsoil.psu.edu.
An alternative to mowing is the use of prescribed burns. Using fire as a way to manage grasses must be done under the supervision of someone knowledgeable and experienced with prescribed burns, in order to ensure that the fire does not get out of control or harm non-target species. Your local DCNR service forester may be able to perform the burn, or put you in touch with someone who can. To contact the nearest service forester go to www.dcnr.state.pa.us.
In the past, many people were hesitant about using prescribed burns because of liability issues. However, in July of 2009 the Pennsylvania state legislature passed the Prescribed Burning Practices Act (House Bill 262). This act provides protection in situations where burn plans have been reviewed and meet the standards set up by DCNR. Criminal and civil liabilities for those contracting and performing those approved burns will be limited under the Act.
For the full text from this Act go to www.legis. state.pa.us, click on “Legislation Enacted Since 1975,” and enter in “2009” into the Year box. [LINK] As a general rule, prescribed burns should take place in the early spring, typically from late March to the first half of May. The fire from prescribed burns removes the previous year’s dead top-growth of the warm season grasses, and also can kill new competing cool season grasses or invasive plants. The fire does not destroy the warm season grasses because their roots grow so deeply, and the next year they will grow denser and healthier than before.
A note of caution: some invasive plants actually grow more after being burned (tree-of-heaven, for instance), so be sure to know what types of plants are in the area, and how they will react, before starting a burn. Another consideration to keep in mind is that certain habitats, such as serpentine barrens, derive their unique plant communities from the lack of certain nutrients. In habitats like that, a prescribed burn can be counterproductive because the burn introduces potash and nutrients that will upset the balance and sustainability of the soil chemistry. The key is to know your landscape’s vegetation, geology and soils before starting a prescribed burn.
Weeds are plants that are considered unattractive, undesirable or troublesome in the place where they are growing. Depending on a person’s mindset, weeds can be native plants, non-native noninvasives or invasives. There are many ways to deal with weeds, and the methods will depend on the species, its location and other pressing management projects. The same applies to pests, a term that could include weeds, unwanted wildlife like white-tailed deer and nuisance geese, insects like hemlock wooly adelgid and diseases like Armillaria root disease. The suggestions on the next page will provide information for controlling and managing for invasive species and other pests.
Invasive species are species that are non-native to the ecosystem under consideration, and whose introduction causes or is likely to cause harm to the economy, to the environment or to human health. Invasives are able to out-compete our native species due to a lack of natural predators, fast growth rates, tolerance of a wide range of habitat conditions and other characteristics that give them a leg-up in the natural world. These species arrived in Pennsylvania through many means - accidentally in packing material or in ship ballast water, intentionally through the horticulture or agriculture trade, and naturally by birds and other wildlife, the wind and water spreading seeds. Because there are so many different invasive species out there, it is near impossible to know them all. The following section highlights some to watch out for. According to the DCNR publication, “Invasive Plants of Pennsylvania,” there are more than 50 species of invasive plants in the Commonwealth. In many areas of Pennsylvania, one quarter or more of the plant species in a given area are invasive.
Appendix 3 of Creating Sustainable Community Parks and Landscapes, 2nd edition lists many plants in the Commonwealth that are considered to be invasive. There are also many invasive insects, animals and pathogens to deal with. This includes forest pest insects like hemlock wooly adelgid, emerald ash borer (EAB) and Asian longhorn beetle, which have the potential to destroy large areas of hemlock, ash and maple tree species, respectively. As of June, 2009 seven counties in Pennsylvania have a quarantine against moving ash trees and lumber, as well as any wood chips and firewood, in order to stop the spread of EAB.
Invasive birds in Pennsylvania include the European starling, the European house sparrow and the mute swan. These birds are a concern because they can out-compete native birds for food and nesting sites, and in the case of the swans, can consume large quantities of aquatic native vegetation that is vital to the health of aquatic ecosystems, like the Chesapeake Bay.
Invasive mammals are currently not very common in the state, but there are two that could grow into a bigger concern in the future: wild pigs and nutria. Wild pigs (either Eurasian boar, feral swine or hybrids of the two) have escaped from hunting preserves in south central Pennsylvania and Maryland. They are a concern because they destroy habitat and can spread diseases to domesticated pigs. As of the summer of 2009, the Pennsylvania Game Commission is drafting regulations to regulate the control of this species. Check on their website for updates on this, www.pgc.state.pa.us.
Nutria are large rodents from South America that live in aquatic habitats. Nutria cause significant damage to wetlands by over-consuming the vegetation, which can lead to erosion. Nutria are not in Pennsylvania yet, but are in some neighboring states and could cross the border in the future. The website www.invasive.org can provide more information on these and other invasive species.
Invasives are not restricted to the land; there are a variety of aquatic invasive plants and animals as well. These species can negatively impact recreation like boating and fishing, destroy quality habitat for native species and cost millions of dollars to the economy. Aquatic invasives include snakehead and round goby fish, whirling disease and rusty crayfish. More information on these and other aquatic invasives is available at www.fishandboat.com.
One aquatic species of particular interest is the zebra mussel. These fingernail-sized fresh-water mussels are found within Lake Erie and have spread to some tributaries and parts of the Susquehanna River.
These mussels are dangerous for a variety of reasons: they clog water intake pipes at wastewater and drinking water facilities, clog up boat motors and consume large amounts of plankton, leaving less for native species. It has been estimated that the yearly economic impact to the United States and Canada from zebra mussels is about $140 million in damage and control costs. Pennsylvania SeaGrant is looking for individuals and groups to monitor for these small creatures in the hopes of stopping their spread.
It is important to remember that not all nonnative species are invasive. For instance, many of our domesticated animals and plants are nonnative, but they are not considered invasive because they do not spread from the farm fields into the surrounding wild habitats. Invasives, on the other hand, can out-compete native vegetation, offer little to no value to wildlife and can negatively impact recreational activities and the economy. Once an invasive species becomes established, it could be difficult if not impossible to completely eradicate. It is therefore essential to be able to identify the various invasive species so you can monitor for, prevent and remove them right away. The best way to manage for invasives is to prevent them from entering the area to begin with. Once they are there, it comes down to controlling them.
Preventing and controlling invasive plants can sometimes be a complicated project, particularly in areas of heavy infestation. Prevention is the most important step you can take in managing invasive species, because once an invasive is in an area, it may be too late to easily control it. One prevention method is the washing of maintenance equipment after it has been used (and prior to moving it to another site), particularly in areas of known or suspected invasive species populations.
Invasive weeds and their seeds can become attached to this equipment at one location and moved to a new spot where they may be able t grow. The tires, axles, blades and other parts of the equipment that come in contact with vegetation or soil should be cleaned before being moved from the location. The same goes for staff cars and trucks that travel through areas where invasives may be present. Further information on road and trail management of invasives can be found through the US Forestry Service’s "Backcountry Road Maintenance and Weed Management".
Staff, visitors, and the general public should be educated on the dangers of invasives so that they can actively prevent their spread (see Chapter 5 of Creating Sustainable Community Parks and Landscapes, 2nd edition for more on raising awareness LINK), since people can spread invasives on their shoes, bike tires, clothing and pet’s fur. One idea comes from states like Ohio and Indiana, where they use boot brush stations at trailheads to help cut down on this problem. Pennsylvania DCNR is following in these states’ steps, installing similar boot brush signs in six state parks in 2010.
In terms of aquatic invasives, if you have a lake or stream on the property where people recreate, encourage visitors and staff to clean off any visible mud and plants from boats and fishing gear before leaving the area. Hot water or a high-pressure water spray should be used for this. These preventative measures will reduce the likelihood of invasions from zebra mussels, Hydrilla, and other aquatic nuisance species (ANS). Visit www.protectyourwaters.net for more information on preventing ANS.
Several of the most problematic invasive insects, like emerald ash borer and Sirex wood wasp, can enter an area in firewood. It is therefore very important to inform visitors to your landscape of this problem, and make sure that if they do use firewood, they bought it locally. This reduces the chances of bringing in a new pest insect. For more information on emerald ash borer (EAB), visit www.emeraldashborer.info.
Another way to prevent invasives from entering your landscape is to minimize soil disturbances. Soil disturbances can come from bringing in heavy machinery to create new trails and roads, from people recreating on steep slopes and other places where they shouldn’t go, and from flooding events.
Invasive plants are frequently the first plants to colonize a bare patch of soil. So protecting the soil with native vegetation will help keep out at least some invasives. You should also avoid creating new roads, trails and parking lots in areas of known infestations in order to prevent their spread.
populations that are already established, or where prevention methods were not successful, control methods should be used. To make an invasive control project more feasible, the area should have an invasive species management plan that will prioritize control options for the various invasives, based on their impacts on the area’s management goals. The suggested format for these plans is found at The Nature Conservancy website, www.invasive.org.
Control efforts might work best if they are targeted towards one or two problem species, or focus on one or more areas of valuable habitat, instead of taking on the daunting task of controlling all invasives in all areas at the same time, especially since there are so many options for control. Sometimes manual methods like hand pulling and cutting can work, while other times herbicides are the only method that will get rid of the invasives. The methods used will depend on the type of invasive, the location of the invasive (wetland, fragile habitat, along trail), the time of year and the resources available. It is very important to match the control method to the invasive species in order to maximize its efficacy.
Because there are so many choices in terms of invasive plant control, they cannot all be mentioned here. However, the following is a brief description of some manual and chemical methods. In terms of manual control, there are a variety of tools that can be used, such as the weed wrench and root talon. These help pull out shrubs and small trees by providing leverage. The weed wrench comes in four sizes and is made of steel, which makes it durable, but heavy. The root talon, on the other hand, is made of plastic, so it is cheaper and lighter, but not as durable.
Machines like flail mowers and brush hogs can mow down invasives that are too big or in too large a quantity to hand-pull. Girdling, a process in which a three to four inch band of bark is cut off from the tree or shrub, is a method that can be used to kill the plant but leave it standing to provide wildlife habitat. A word of caution about pulling and cutting: some invasives like autumn olive and tree-ofheaven will actually grow in thicker and more abundant if they are cut or pulled. Therefore, you must use herbicides in conjunction with other methods when trying to control these invasives.
There are many brands of herbicide that may be effective at controlling invasive plants. A description of these chemicals and how to use them can be found at http://vm.cas.psu.edu/. If any herbicides are used, it is important to follow the label exactly and take care to avoid the surrounding native plants. Herbicides can be a great tool in controlling invasives, but they can also pose negative impacts to the environment if they are misused.
Herbicides can be applied to the leaves, to the bark, or applied to a cut stem. Spraying it on, painting or wiping it on, or injecting it can do this. There are a variety of tools to do this, including backpack sprayers, handheld squirt bottles, wick applicators, saturated gloves and EZ-Ject lances. For larger scale infestations you can mount boom applicators and canisters to an ATV or truck.
The types of equipment used will depend in large part on your budget and the size of the infestation. Each method has its benefits and drawbacks – you can learn about these through trial-and-error or by networking with other experienced land managers. No matter which control method you choose, remember that timing is critical, that each invasive plant reacts differently to the various control methods, and that many herbicides must be applied by a certified pesticide applicator. If no one on your staff is certified, you can hire a professional or contact the Pennsylvania Department of Agriculture to become certified (www.agriculture.state.pa.us).
IPM is used in conjunction with proper planting techniques, and may consist of choosing pest-resistant plants, quarantining suspected plants and insects, releasing sterile male pests to inhibit breeding, using traps to catch pests, releasing predator insects to eat the pests and choosing chemicals, like pheromones, that target specific pest species. The Galerucella beetle has been introduced in various locations throughout Pennsylvania and other states in order to feed on the leaves of the invasive purple loosestrife plant.
The PA Integrated Pest Management Program states that IPM techniques typically cost less money than traditional pest control methods, but they can involve more work up-front. There are six steps to IPM: identify the pest, understand its life cycle and the food it eats, figure out how many pests there are, determine how many are too many, choose the control methods and evaluate whether the method(s) worked.
In many areas of Pennsylvania, white-tailed deer are so abundant that they have completely destroyed the forest understory and reduced the vegetated groundcover to ferns and invasive species. In 2006, aerial surveys of over 460,000 acres of DCNR and Game Commission lands showed that average deer densities range from 8 to 18 deer per square mile, with some areas having as many as 126 deer per square mile. Deer densities over 20 per square mile have been shown to limit the forest ecosystem’s chances for regeneration. Higher deer densities can also lead to greater potential for increases in car accidents and cases of Lyme disease, as the deer are forced to move into populated areas to find sources of food.
In any landscape, too many deer can be a nuisance, but in a sustainable community park or landscape the damage could theoretically be even worse, considering there will be more native vegetation for the deer to eat. Luckily there are ways to manage for deer. One step is to choose plants that are “deerproof,” meaning that deer will not eat them unless there is absolutely nothing else for them. These plants include big bluestem grass, switchgrass, milkweeds and spicebush. A list of these plants is on the site, www.bhwp.org (click on the “Native Plants & Resources”). Another option is to spray deer repellant around vegetation and any other area where you want to keep deer out. These repellants work by giving off a bad odor or taste that will repel all but the hungriest of deer. They will need to be re-applied after precipitation, however. Noise repellants have a very short-term efficacy, as deer become accustomed to the noise within a week, so their use is not recommended. The use of fencing can help keep deer out, and would be especially beneficial for tree saplings and areas of high habitat value. In order to be effective, fencing should be eight feet tall.
When the soil is properly maintained, and plants have been chosen according to the existing moisture, climate and light conditions of the area, little supplementary water should be needed, except for the first few years while the plants establish. In areas where water restrictions are common, or as part of a climate change adaptation plan that prepares for future changes in precipitation, selecting drought-tolerant species is a good choice.
In areas where newly planted natives are found, be sure to water deeply, especially during the spring and fall growing seasons, when it has not rained. This encourages the roots to grow deeper, thus keeping the plants healthy and helping to prevent soil erosion. One inch of water per week is all that is required. The best time to water is during the early morning, although evening is the next best choice. Watering during midday or afternoon is less effective because the sun will evaporate the water much more quickly. Turfgrass will let you know when it needs to be watered. If you walk on grass and it remains flat and shows footprints, it may need water. Similarly, shrubs and wildflowers will wilt and droop when they need water. In both cases, remember to water deeply and thoroughly.
The use of a sprinkler system is typically not necessary, considering the amount and frequency of precipitation in Pennsylvania. However, if sprinklers are to be used, also use a rain gauge. This device makes sure that the sprinklers do not come on if it has recently rained. A timing device on the sprinklers will also help save both water resources and money by limiting the length of time that the sprinklers operate. There are certified irrigation specialists out there that can help maximize the efficiency of your irrigation system. To find one of these professionals or to become certified through the Irrigation Association, go to www.irrigation.org.
Alternatives to sprinklers include soaker hoses and drip irrigation systems. These systems may use up to 70 percent less water than conventional irrigation systems. Soaker hoses look like a typical garden hose, except that they are made of a material that allows water to soak out of the entire length of the hose, providing moisture for up to 18 inches of soil on each side of the hose. Drip irrigation systems are similar, except that they have small holes along the length of the hose with which to target specific plants. These hoses are more useful for small flower gardens and plants in rows, rather than large turf areas.
Rain barrels can be placed under gutter downspouts and the water used for irrigating small, vegetated areas around the landscape. To prevent mosquitoes from breeding in the barrel, either empty the water every 24 to 36 hours (it takes 48 hours or more for mosquito eggs to hatch) or place a thin layer of vegetable oil on the surface of the water, which will kill any existing eggs. The barrel should be scrubbed once a week to remove any eggs that may be attached. In order to hold more rainwater, a cistern could be used. A cistern is an underground storage tank that captures hundreds of gallons of rainwater from roofs and other non-porous surfaces like parking lots for later use.
No matter which water conservation solution you choose for your sustainable landscape, proper maintenance is essential for prolonging the life of the equipment and saving money in the long term.
Because sustainable community parks and landscapes differ from traditional human-focused landscapes in many ways, the average park user, staff member or municipal official may not initially appreciate or understand the changes. Therefore, before any sustainable landscape is designed and constructed, information should be obtained to find out about the staff and public’s concerns, wishes and ideas. These stakeholders should be included in every stage of the design process in order to gain their buy-in and involvement. The goal should be to have a landscape that not only protects natural resources and is environmentally sustainable, but also is appealing to people with diverse interests. In order to do that, you need to know what the people’s needs and knowledge base are. Information exchange and an established public relations campaign will be essential for determining that.
Staff and the public should be included in the design process as early on as possible. Increased participation in the early stages of a project increases the chances that all stakeholders can have a real impact on the outcome, and that they will agree with the final results. They will welcome the chance to have their opinions heard, particularly if they know it can actually lead to direct action or change. You will get better results if you show them photos or models of various alternatives, and have them pick or rank the design they like the best, rather than asking them, “What do you want in this landscape?” because they will usually either have no opinion or have unrealistic desires. This process can take place at public meetings, community festivals, through mail and phone surveys, or through other means. The design that secures the most votes should be the one that is chosen - with minor modifications to fit budgetary and space constraints, if necessary.
Once a new sustainable landscape is designed and constructed, or once changes to an existing landscape are made, the public relations and education process will still need to continue. Park visitors that are accustomed to ball fields and large facilities may need a little extra information and encouragement to see the beauty and importance of a sustainable community park. Staff members that are used to mowing large swaths of turfgrass around the office will need to see that their job is still important and that maintenance will still need to be done. This can be accomplished through a variety of means, one of them being the development of educational materials. The following section describes a variety of educational materials and programs that could be implemented to enhance staff and public experiences and knowledge.
When conveying information, keep in mind that people often resent being told something they already know, but will appreciate new information that helps expand on their previous knowledge. Relating this new information to what they already know will help them understand it more fully and remember it better. The serious mistake made most often is giving so much information to people that they cannot retain and understand it all. Using visual information along with bulleted sentences or phrases usually helps to get a point across much more effectively.
You have to find a way to overcome these communication roadblocks when dealing with staff and the public because making the switch to a sustainable landscape may create situations that upset some people. As was mentioned earlier, for instance, creating a riparian buffer limits the areas where people can access the water. Fishermen may not find that situation appealing, so you must find a way to show how the change benefits them - more vegetation around the water body means better habitat for aquatic insects, which translates to more fish.
When creating written educational materials you can use several steps to make sure that the maximum amount of information is received and understood by the majority of people. The first step is to figure out what you hope to accomplish through the educational material. Who is your target audience, and why do you expect them to be interested in your message? What subject matter will you cover? Once you determine these elements, it is time to decide what type of educational materials you want to create. The following is a small sampling of the types of educational materials that could be used to get your natural resource protection messages across. For more information on crafting communication strategies and publications, read Life. Nature. The Public. Making the Connection, a publication of the BioDiversity Project.
When writing a brochure, the key is not to include too much information. The more words, the less likely people are to read it. Use bulleted phrases and graphics to break-up the text. Make sure the language is basic enough for most people to understand. Technical terminology will turn many people off. It also helps to incorporate the audience’s knowledge, fears and concerns in the document so that they can relate to what is being said. Your key message should be prominently displayed on the front of the brochure. This way, even busy people who quickly scan the front of the brochure will take away the gist of your message. There should also be a unifying theme throughout your educational materials that will “hook” the reader. This hook should emphasize why your message is unique, and how that uniqueness benefits the reader.
For example, your commercial development recently planted a large butterfly garden that attracts numerous butterfly varieties not normally seen in a typical strip mall development. Your unifying theme could be “Rare and Beautiful Butterflies are a Sight to Behold.” The brochure would show people some of the butterfly varieties, as well as people enjoying the butterfly watching.
A brochure is meant to spur someone to action, whether it’s volunteering to help out in your park, creating wildlife habitat in their own backyard, donating money to an agricultural preservation society or simply learning more about a subject. If the brochure isn’t increasing the number of people supporting your landscape in one way or another, the brochure isn't doing its job.
There are already a wide variety of fact sheets on various subjects available. For example, a Google search for “invasive species” and “fact sheet” will return tens of thousands of hits. Therefore, you may find what you are looking for without having to re-create it. Many existing fact sheets can be tweaked to apply to your landscape. Most organizations will allow you to reproduce their publications as long as you credit their group as the original author and as long as your organization will not make money from the publication.
A good source of invasive species fact sheets is available on the DCNR online invasive species tutorial for land managers at www.dcnr.pa.gov/Conservation/WildPlants/InvasivePlants. A source of plant fact sheets (both native and nonnative) can be found through the USDA at http://plants.usda.gov/java/factSheet. If you are looking for wildlife fact sheets, the Pa. Game Commission’s Wildlife Notes could come in handy. Go to www.pgc.pa.gov/EDUCATION/WILDLIFENOTESINDEX.
Just like in brochures, include colorful pictures and drawings, and write in a bulleted format. You want to keep a fact sheet to just that, one sheet. To cut down on the amount of information, include web links for people who want to learn more.
Newsletters can come in either paper or electronic format. Many organizations are going the electronic route (ie. Internet or email-based) to be more environmentally-friendly and to save money on ink and paper costs. Deciding between the two will depend on newsletter budget, the technologic know-how of staff and the availability of computers among the newsletter audience. By going electronically you are not limited by page numbers or article length as much as with printed materials, but you may miss a segment of the population who does not own a computer. Weigh those two sides before settling on one form over the other.
Other factors that can determine whether or not a newsletter is successful include a commitment of staff time and the quality and quantity of written material available for inclusion. Newsletters occur on a regular basis, whether monthly, bimonthly or quarterly. You will need to decide in advance which schedule will work best. Each issue should be published on the same day of the month to establish credibility and good readership.
The content and format of the newsletter is where the creativity and uniqueness can come in. Make the newsletter a reflection of your landscape and all that it has to offer to staff and visitors.
Articles describing the various natural resources, educational programs, staff expertise and upcoming events are just a few of the items you could include in a newsletter. You can involve readers by asking them to send in questions, opinions, photos and articles. The more they feel connected to the newsletter, the more likely they will be to continue reading future issues.
You don’t have to be a professional educator to teach, although it certainly helps. This section is for those people who do not have a formalized background in education. This is a very quick and generalized overview of what is needed to run educational programs in an informal setting.
Once you have an idea of the subject you want to teach and the audience you want to reach, you will develop an original lesson plan, or find an existing lesson plan that will fit your needs. This is not always as easy as it might seem, but there are online resources that can help. One source of information is a free online course available at www.eppley.org (click on the "National Park", then scroll down to "Foundations of Interpretation"). Another source of quick, yet detailed step-by-step directions for creating lesson plans is available at www.lessonplanspage.com.
Other sources of information are out there—some that are free or come with a cost—so you don’t have to create educational curriculum on your own. You can tailor existing lesson plans to meet specific educational programming needs. The Pennsylvania state park educators are available to provide state-specific lesson plans. To find a park educator near you, go to www.dcnr.state.pa.us.You can also find lesson plans online at www.lessonplanpage.com.
If you are developing lesson plans for K-12 students, it helps to incorporate state education standards and anchors into your curriculum. Formal classroom educators are more likely to use educational materials that are developed in concert with these standards, since standardized tests have become so important. For a list of Pennsylvania state standards and anchors go to www.pdesas.org.
Interpretive displays are temporary or permanent posters or signs that provide information to people. Display panels in sustainable landscapes may include hiking trail maps, business hours of Operation, and rules and regulations. Sustainable landscapes can use interpretive displays to educate staff and the public about the differences between this and traditional landscapes. Signs can highlight the variety of wildlife and plants found within the landscape. If an invasive species control project is underway, the display can let people know about what is being done, and why it’s being done. This helps to cut down on visitors saying, “Why are you cutting those trees?” or “Why is that guy spraying chemicals on those plants?” An interpretive display will help to educate visitors when there are no staff or volunteers around to answer questions.
Involving staff and the public in every step of the process — from design to management and maintenance — is a valuable way to minimize controversy and increase the chances that a project will be done on time and under budget. Planting natives, removing invasives, stabilizing streambanks and leading nature hikes are just a few of the projects local volunteers can be involved in. But while having volunteers can be a great help, it is not without its challenges. You will need a certain level of organization and leadership to be able to coordinate the volunteers and keep them motivated. With all the other management concerns in a landscape, keeping up an active volunteer group can easily fall by the wayside.
The use of volunteers for work in a landscape typically falls into one of three categories: one-time events, often using a large number of volunteers focused on one issue; regular volunteer work days, typically once a month on the same day; and independent, well-trained volunteers who come in on a regular basis to work on one or more issues. The amount of staff time and resources available will determine which category to use.
One-time events require a lot of up-front planning and coordination. One or more staff should be dedicated towards planning the event. One-day events are good for removing large amounts of invasives, planting large areas with trees and other vegetation, or trash clean-ups. However, these events should not be used for every site and situation. In areas prone to erosion, in places with valuable native vegetation or in places that may be hazardous to volunteers, large groups should not be used, as they may create more disturbance that could further spread invasives or increase erosion. An ideal rule-of-thumb is to have a ratio of no more than 10 volunteers for each supervisor, when working in the field, to ensure that all volunteers are working in a safe and effective manner
Regular volunteer work days are more appropriate for long-term maintenance and control of invasive plants and garden upkeep. This type of volunteer commitment requires the continued involvement of at least one dedicated staff member to ensure that volunteers remain interested in the effort. The use of trained independent volunteers works well for monitoring large control areas over an extended period of time, landscaping, and leading educational programs for the general public. Again, however, you will need a staff member to train these volunteers and keep them motivated.
Motivation and retention of your volunteers will depend on many factors, some within your control, others not. People volunteer for many reasons. Some may have grown up near the park or landscape and do not like how the invasives have taken over, while others like to garden but don’t have a yard of their own. Still others are retired school teachers looking for a way to reconnect with children and learning. Whatever their reason for volunteering, it is key to keep them happy and feeling appreciated for the work they do for you.
One simple thing is to make sure to communicate the importance of the volunteers’ work as part of a larger purpose: that of making the landscape a nicer place. Show them how their individual work adds up to something spectacular.
Make sure to give volunteers enough to do so that they feel that they are not wasting their time. Whether these volunteers are just there for the day or come in every week, give them a sincere “thank you” in person, followed by a note or certificate for their involvement. If the budget allows, giving out t-shirts or other small tokens of appreciation can do wonders for volunteer morale.
Recognize also that weather can have a major impact on volunteer spirit. Extremely hot or cold days, as well as rainy ones, can put a damper on a volunteer day. Planning ahead for such weather situations can mean the difference between happy, efficient volunteers (with plenty of water and ponchos for the rain) versus grumpy, sluggish volunteers (getting dehydrated or frostbitten). Another option is to get Americorps or Student Conservation Association (SCA) members to do work around your park. Americorps State programs offer grants to help non-governmental and governmental organizations hire Americorps members to perform direct services for unmet community needs in education, public health and the environment. A team of Americorps members may be able to come to your landscape for full- or part-time work for up to one year. Americorps members have been involved in park improvements and recruiting community volunteers to expand the reach and effectiveness of programs for the organizations they serve. For instance, Pennsylvania state parks like Raccoon Creek, as well as other park systems, have used Americorps volunteers restore habitats.
The National Park Service, the US Fish and Wildlife Service and park agencies in states such as Pennsylvania, Florida and New York have used the Student Conservation Association (SCA) environmental stewards for hands-on projects in the field. You can hire either one intern, or a whole crew, that specializes in construction, maintenance and restoration projects. For more information on SCA, visit www.thesca.org.
The management and maintenance of sustainable community parks and landscapes will differ in some respects from traditional turf and facility focused land uses. Therefore, your staff and volunteers will need to be trained and educated on the differences, in order to be effective and efficient in their jobs. Using this guidebook is a great first step in educating your staff. Use the information presented in the book during training sessions and staff meetings, as well as during everyday duties and responsibilities. Communicate with other local organizations and landowners to find out what has and has not worked for them, and share your ideas as well. The following are four recommendations for designing a training program:
A typical sequence of training events is as follows: in the beginning, go over the training’s purpose, learning objectives and key concepts, and then do an ice breaker. The bulk of the training will then focus on learning the objectives and key concepts. A variety of activities exist to get the concepts across: lectures, role playing, Power Point presentations, panel discussions, brainstorming, case studies and hands-on demonstrations. Breaks should be included after any activity that will last 90 minutes. To end the training, summarize the content, have participants discuss how the training will affect the way they do their jobs in the future and hand out evaluation forms.
Easy access to parks, scenic natural views, clean river corridors and other greenspaces should be a given, but unfortunately there is sometimes a disparity between urban versus rural, rich versus poor, one race versus another. While in the past environmental justice has typically been used in reference to uneven exposures to pollution, the term can also be applied to the presence or absence of quality natural areas within a community because access to these areas can contribute to better health, as was stated in Chapter 1 of Creating Sustainable Community Parks and Landscapes, 2nd edition. Studies have shown that in places where people have fewer resources like money and personal transportation, coupled with factors such as perceived neighborhood safety, they are less likely to be physically active, leading to higher rates of obesity, diabetes and other health risks.
Managers of sustainable community parks and landscapes should work in conjunction with their municipal and county governments to ensure that access to greenspaces is as equitably distributed as possible. For as Betty Morrow, a sociology professor at Florida International University, once wrote, “It can be argued that a truly sustainable community is impossible without environmental and social justice.”
The subject of environmental justice is certainly a heavy one and too large to discuss in great detail here. However, when creating and managing a sustainable landscape, keep these thoughts in mind to minimize the chances of leaving anyone out or placing a heavier burden on a certain population:
It isn’t just about access to natural areas, it is also about the size and quality of these natural areas. For instance, a study done on parks in Baltimore showed that while African American communities lived within walking distance of more parks than white communities, the parks near the white communities spanned more acres and were less crowded than the parks in predominantly African American neighborhoods. Other studies, like one done in the Chicago area, showed that parks in low-income and minority neighborhoods had poorer vegetation quality, lower maintenance, and accessibility issues that deterred residents from using the parks.70 Just because the greenspace is there, doesn’t mean that someone will necessarily use it. A sustainable landscape must be well-designed and properly maintained in order to be of use to the surrounding community and the plants and wildlife that inhabit it.
A growing population base and an outdated existing school were the driving forces behind the need for this new facility, which accommodates 1,400 students and over 100 staff members. This facility shares the expanded 230-acre “campus” where the district’s Middle, Intermediate and newest Elementary schools exist. The need to preserve natural environments on this campus was a key concern to many since the inception of the design phase. (Learn more)
In an effort to provide enhanced wildlife habitat on the MHS’ approximately 10,000 acres, installation of warm season grass meadows began in the Spring of 1997 with a fifteen acre plot of indiangrass (Sorghastrum nutans), eastern gamagrass (Tripsacum dactyloides) and, predominately, switchgrass (Panicum virgatum). Since that time, the area covered by meadows has increased to approximately 150 acres. (Learn more)
Sustainability is a concept that is integrated into all facets of the Bayer Corporation’s business. Bayer was looking at how what they do impacts the environment and human health. It was this commitment to sustainable development and the company’s empowerment of their employees that prompted one staff member to contact the Wildlife Habitat Council (WHC) in 1997 to see how to better utilize their Pittsburgh campus for natural resource protection and environmental education. (Learn more)
Triangle park, surrounding residential neighborhood, as well as nearby Stoney Creek, have a history of flooding. Borough residents and a team of stormwater professsionals, including a licensed engineer, looked at existing conditions in the park and the surrounding area to identify retrofit opportunities and best management practices (BMPs) that could alleviate flooding and water quality problems in Stoney Creek. (Learn more)
Pennsburg Shade Tree Committee decided that the Borough’s one and only “natural” park, inherited from a local golf course, needed some serious work in order to meet its namesake: the Pennsburg Nature Preserve. Some of the concerns of the Committee were that the stream in the park was badly eroded, there was too much grass to mow, the park wasn’t “natural” and it lacked decent riparian vegetation and floodplain forest. (Learn more)
This development was designed, incorporating sustainable stormwater management practices. According to Wes Horner, former associate at CH2M HILL (the engineering firm responsible for the LID design), “Our approach at Springbrook was to keep the stormwater as close to the source as possible, cleansing and recycling it with many different ‘best practices’.” (Learn more)
The Flourtown Country Club was an existing facility owned by Springfield Township (Montgomery County, Pa.). The Township determined that improvements to the facility were needed and decided to create a new entrance to the club with more defined circulation to enhance the safety of both pedestrian and vehicular traffic. The Township saw an opportunity to create a more sustainable site, while still meeting the needs of the Township and addressing the immediate safety concerns. (Learn more)
This material was excerpted and/or adapted from “Creating Sustainable Community Parks and Landscapes, 2nd Edition”.
Nothing contained in this document is intended to be relied upon as legal advice or to create an attorney-client relationship. The material presented is generally provided in the context of Pennsylvania law and, depending on the subject, may have more or less applicability elsewhere. There is no guarantee that it is up to date or error free.
Copyright © is held by the Pennsylvania Land Trust Association
Text may be excerpted and reproduced with acknowledgement of ConservationTools.org and the Pennsylvania Land Trust Association.