Living Lighter on the Land
We greatly expanded our growing area this spring and summer at the Armstrong Education Center and have been reaping the fruits of our labor, both in the organic vegetable garden and in our native plant gardens. These gardens are used to demonstrate sustainable land use concepts such as local food production for humans, honeybees, and other wildlife.
The plants have enjoyed our lovely fall weather and produced a late abundance of fruit and blossoms. This summer was persistently cool and cloudy, which allowed for an extended planting season but also delayed or stunted blooming. It also encouraged plant predation by insects. Our vegetable gardens sustained heavy damage early on from Colorado potato beetles and the Squash vine borer (see my earlier blog post about how to keep squash producing into fall). Later, we had difficultly controlling the Mexican bean beetle and caterpillars on the cole crops. Not even our resident bull frog, pictured here, could keep them in check. Because we strive to strike a balance with insect populations as part of the web of life, we use only organic methods in our gardens and attempt to deter them mainly through crop rotation and mulching.
When things get out of hand, my tried-and-true method for organic pest control in the garden is to make "bug juice," also known as "sick juice." I collect as many of the offenders as I can in a small jar with a lid. I puree these in a little water in an old blender that I have reserved for this use. Then I strain this liquid through a fine sieve and pour it into a spray bottle. I use the rinse water from the blender jar (after it has been sieved) to dilute the liquid further. Then I spray this on plants that are affected by that particular insect. This is basically biological warfare: the premise being that one of the bugs in the mixture will carry a disease that then quickly spreads through the entire population. This works on insects that have become overabundant on any kind of plant, including this native milkweed that has been infested with aphids.
See our website calendar for a list of events you can attend for hands-on education on how to manage your own property with a Living Lighter on the Land mindset. Learn how your activities can support the Pound Ridge's efforts to become a certified Community Wildlife Habitat, and please join our mailing list or like our facebook page for news and updates related to local conservation initiatives.
Chores still to be done at this time:
- Plant winter rye as a cover crop, or mulch beds with shredded leaves covered by straw.
- Plant trees and shrubs, and consider adding support until roots are set next year.
- Create a leaf pile for a steady source of Fall mulch and Spring seed-sowing medium.
- Harvest fall crops such as spinach, lettuce, and kale, and keep those beds covered at night.
by intern Kadijah Spence and Krista Munger. Pound Ridge Land Conservancy land stewardess, Krista Munger and interns are working in the garden to water, thin, and harvest.
Now that you have planted crops according to the time line presented in the previous article it is time to water, thin and harvest. If you haven’t already transplanted plants started indoors, please do so as soon as possible. In the Armstrong vegetable garden, we have tomatoes, squash, peppers, and basil which were all transplanted the end of May/beginning of June along with carrots, beets, beans, lettuce and other greens. The seeds we use were purchased from or donated by Hudson Valley Seed Library. This link gives more information about sowing seeds directly into the ground.
Our strawberries are harvested on a daily basis and other greens are harvested weekly. Strawberries are best picked when the bottom is fully ripened and red. They hold the most nutrients when eaten picked and eaten fresh. Leafy greens can be picked until their juice shows milky white. We recently planted beets and corn. The beets only need one seed per hole and are spaced 3 inches apart. Where you have spilled too many, wait for them to grow a few inches and then thin them by selecting the smallest ones of the group. Corn resembles grass when young, so be careful when weeding. If you are unsure of a plant's identity, then leave it until it flowers and use a guide to identify it.
There are many ways to use the vegetables and fruits from your garden. One can add chopped up strawberries to make a special treat for the kids in the morning. A fresh salad made from hand-picked garden greens is a perfect way to start the afternoon. To get a bit creative, one can garnish meat with herbs from the garden.
Beginning the Fall Garden
To grow a fall garden in southern New York, buy seed now before it becomes unavailable. You will need to start seeds in midsummer to be ready for transplanting in early autumn. If you start them inside, seedlings should be hardened off just as they are in spring; gradually let them adjust to the stronger sunlight of the outdoors. We plan to start ours outdoors under an adjustable shade canopy.
Semi-hardy vegetables for our climate include beets, carrot, cauliflower, celery, Chinese cabbage, endive, Irish potatoes, lettuce and salad greens, radicchio, rutabaga, salsify, and Swiss chard. These will die back with the first hard frosts, so their fall growing season is short. The hardiest vegetables for fall gardens are bok choi, broccoli, Brussels sprouts, cabbage, collards, English peas, kale, kohlrabi, leeks, mustard greens, parsley, radish, spinach and turnip. Using a cold frame, these vegetables can be grown right through the winter.
by intern Kadijah Spence and Krista Munger. Pound Ridge Land Conservancy is proud to welcome six new interns this summer.
Nick and Chris are students from Fox Lane High School's Aspire Program. They are here for their final school semester and are working to gain experience in the environmental field before heading off to college.
Ryland just graduated from John Jay High School and is very experienced in working outdoors. He is in charge of native plant restoration projects at the Armstrong Preserve and Education Center, and is sponsored here by a grant from the Rusticus Garden Club.
Shawn is enrolled in the Stamford AgriScience Program. Shawn works in the "Working Backyard" at Armstrong, taking care of the organic vegetable garden, native plant gardens, the compost and chickens.
Our college interns are Kadijah from Yonkers, attending Manhattanville College and Olivia from Waccabuc, who attends Marist College. Both are majoring in Environmental Studies/Science and plan to work in the conservation field. The intern team is joined by a number of volunteers who are dedicated to serving the environment, including returning intern Nick A., Sawyer, Nate, and our board member Al.
All of the interns and volunteers are increasing their knowledge of the outdoors and how to take care of the land. Nick and Chris worked as a team to build a raised garden bed, put up protective deer-fencing, re-route a trail, install stairs down a steep hillside. Ryland planted the newly fenced areas with seedlings grown in our native plant nursery, which is tended by all of the interns in rotation. He has also detected and removed a quantity of mile-a-minute vine, an invasive species which threatens native vegetation by smothering and outcompeting it. Shawn is learning the complex intricacies of our integrated garden and composting system in our "working backyard."
Olivia, as PRLC's Conservation Intern, is helping to execute a number of planned projects including invasive species removal at two of our preserves and trail enhancements at two others. Olivia will also help us to compile data measuring the success of our field work so that we can adaptively manage our priority landscape projects. An example is our longterm project to control the spread of Phragmites in fens at the Isaacson Preserve. A team of four went out recently to count the numbers of plants growing in established plots. They will return on July 12, from 10am to noon, for a Volunteer Work Session. You are invited to join them. It is a beautiful preserve.
You may have seen Kadijah at one of PRLC's movie nights, guided hikes, or volunteer work sessions. She works as an all-around assistant to Krista, PRLC's Land Steward & Educator and is learning how to prepare for and organize events and teams of volunteers. She also plants, weeds, waters and gathers the growing fruits and vegetables in the garden.
On June 18, 2014 Kadijah, Olivia, Nick and Chris joined a team of AmeriCorps volunteers organized by TIP-PR, The Invasives Project of Pound Ridge. They worked to control invasive species at a town-owned preserve behind the Town House called the Slade Preserve.
Below are the albums of the Issacson and Slade Preserves workdays. Please like our Facebook page for our frequent short updates on what we are doing and what we see!
April is Invasive Pest and Disease Awareness Month, and a task force of the United States Department of Agriculture seeks to raise awareness of the threat of invasive species to ecosystems, the economy, and to our own well-being. Their website has excellent photographs of two main villains in our area: the Asian long-horned beetle (ALB) and the Emerald ash borer. It says, “The ALB has the potential to cause more damage than Dutch elm disease, chestnut blight and gypsy moths combined, destroying millions of acres of America’s treasured hardwoods, including national forests and backyard trees.”
Citizen help is needed to stem the spread of known populations and to prevent new ones. Hikers and landowners have reported several new occurrences, and if caught early enough, some cases can be eradicated. In New York, the state has imposed a quarantine on moving firewood and certain other wood products from one location to another, and with good reason. The map on the right shows the known distribution of the Emerald ash borer in New York.
We have been hearing about invasive species quite a lot in our local news in Pound Ridge. Earthworms from Europe aredepleting our soils and forest health, Mute swans (also from Europe) alter water quality and displace native wildlife, and our sources of food for birds and insects are in decline due to competition from non-native species. We seem to have an ecosystem in peril, with the good, the bad, and the ugly in conflict. What can we do? One thing we cannot do is expect Mother Nature to fix the problem. Adaptation and ecosystem balancing occur on such a long time scale that to wait is to risk massive extinctions and the loss of ecosystem services like clean water.
We can, however, draw upon the power or nature to right itself. A healthy ecosystem naturally resists biotic invasion from pests, whether they be animal or plant, because all of the niches in the system are filled. It is difficult for an invader to gain a foothold among the fierce competition of a thriving, co-adapted community. The plants and animals that do become invasive were often brought here intentionally and sold for their pest-resistant properties (because our wildlife cannot eat them).
Recommendations: We must all do our part to support diversity in native ecosystems by protecting certain areas as wildlife preserves and ensuring that those areas are connected by corridors. This is a major concern of the PRLC. We can also greatly expand the boundaries of protected land by choosing to landscape public and private properties with native plants to whatever extent possible, and in place of lawn.
To learn more about the relationship between native plants and wildlife species, attend one or more of the events sponsored by PRLC and other community organizations in our four-part series, beginning April 22, Birds & Bees: Wildlife Needs. Please also see what our neighbors are up to as we work together to certify the town as a National Wildlife Community Habitat.
With lengthening days, we are living lighter on the land this month by harnessing the power of the sun. In our cold frame, thickly insulated with hay and oriented to receive maximum light, the plants are growing so quickly that I have begun to harvest extra greens for our chickens. The girls have rewarded us in turn with up to four eggs a day (from 4 laying hens), and are churning through our compost in search of what bugs are active in March. Next month, I will introduce to you our new and improved solar array, powering the Armstrong Education Center at 100%!
In the Armstrong kitchen, we ate salad from the cold frame all winter long with the exception of a few weeks in January (see Early 2014 North American Cold Wave). I went out often to brush off snow but didn't dare open the door, as I could see though the frozen condensation that the plants were wilting at their tips. The greens pictured here were planted as seed in October: Cavolo kale, Spring broccoli raab, Mizuna, Rossimo lettuce, Red giant mustard, Speckled lettuce, and Renegade spinach. A few Red chard transplanted in have not fared well. The Mizuna and lettuces recently began flowering and so were cleared out to make room for kale and spinach that had somewhat languished beneath. We should have greens for months yet.
The cold frame is serving double duty as our germinator and seedling incubator too. So far, I have started Utah tall celery, Curley parsley, Common chives, Clear dawn onions, Broccoli, and Long Island Improved brussels sprouts, in addition to native species Bladdernut and Groundnut. For most plants (especially New York natives), temperature is not the limiting factor so much as light, and only the sunniest of window sills are adequate. I find it easier, and a lot cleaner, to set up my grow space outside or in a basement/workshop area under lights. LED lights are most efficient, but must be in the correct spectrum for plants to use the light.
See how we grow vegetables, flowers, and native trees and shrubs in the Armstrong Working Backyard our May 3 Plant Swap and Volunteer Work Session. To get started sooner, click here for instructions on making a cold frame and starting seeds. See also our lineup of events in our partnership series Birds & Bees: Wildlife Needs, aimed at educating our community about the role of native plants to native wildlife, including what you can do to foster their habitats on your own property!
If you haven't started planning for this year's garden, now is the time to begin! Nurseries and serious gardeners have already started sowing under lights, and by the end of this month, we can often plant spinach, radish, and sugar snap peas here in New York. Taking some time now to plan what, where, and when you will plant can save you work in the long run and increase the useful yield of your garden. By timing crops to mature in batches, for example, you can produce abundant harvests from May to November, and even beyond with help from a cold-frame or other frost protection.
We recently hosted a Garden Planning Workshop at the Armstrong Education Center, the center of our public programming for education on Living Lighter on the Land. In case you missed it, I will present here some of the material we covered and will also direct you to a webpage I created which serves as something like a resource library for topics covered at PRLC workshops: Land Stewardship in Action Wiki. Feel free to copy the Wiki and add to it for your own purposes.
We covered the basics outlined below and then expanded our conversation based on the specific cases presented, such as fertilization for raised beds that are filled with coir and perlite rather than soil and compost (probably best to take a soil test first). Events like this are a great place to have your specific questions addressed by a group of knowledgeable people. Please see the events calendar on our website for information about our May 3 Plant Swap and Volunteer Work Session, and stay tuned for a planned series in April and May that will teach you how to provide quality habitat for local wildlife using native plants, trees, and shrubs on your property (and get Certified for your efforts by the National Wildlife Federation).
Garden Planning Basics:
- Prepare the soil. It is important to meet the needs of whatever plants you wish to grow, but drastically amending soil can be costly and time-consuming. (link for soil testing services)
- Decide what you want to grow. My advice is to dream big and then whittle your list down according to how much space and time you have. Put everything else on a vision board for later inspiration.
- Map your planting areas. Note the soil and light conditions, and choose plants with similar requirements. Consider planting "companion plants" that grow well together. Some gardeners plan for height variation or for "seasonal interest." I make multiple maps for early season, mid-season, and late season.
- Schedule planting and other tasks such as feeding, mulching, and harvesting. Remember that as some plants reach their harvest point, others can be sown beneath for repeat harvests all season long.
A List of Gardening Tasks for Early Spring:
- Gather materials: Seeds, trays, leaf mold or other sowing medium
- Turn the compost pile so that it is ready when you need it
- Turn the leaf pile to speed up its composting
- Build a trellis for peas
The week starting Feb. 28, under protection, plant onions, leeks, scallions, chives, celery, celeriac, artichoke.
The week starting March 7, under protection, plant all of the above plus arugula, spring raab, and parsley
The week starting March 14, under protection, plant all of the above plus lettuce, early cabbage, kale, collards, broccoli. Direct sow spinach, peas, arugula, and spring/summer onions.
The week starting March 21, under protection, plant the above plus peppers, tomatoes, eggplant, chard, bok choy. Continue to sow plants listed through April.
The week starting March 28, direct sow spring raab, radishes, spinach, peas, arugula, and spring/summer onions
The week starting April 14, direct sow lettuce, carrots, parsnips, spring raab, radishes, spinach, peas, arugula, and spring/summer onions. Transplant lettuce, parsley, scallions, and chives.
The week starting April 28, direct sow chard, beets, lettuce, carrots, parsnips, spring raab, radishes, spinach, peas, arugula, onions. Transplant early cabbage, kale, collards, broccoli, tatsoi, bok choy, arugula, lettuce, spring raab, parsley, chives
To be continued…
In the northeast, home heating is the largest residential energy expense and accounts for up to half of all housing-related carbon emissions. How can you, the conscientious citizen, stay warm in winter without leaving your environmental concerns out in the cold? Answering this question is a top priority at the Pound Ridge Land Conservancy’s Armstrong Education Center, where I live and work out of the Armstrong House, an older home retrofitted with cutting-edge technologies to be a model for low-impact 21st century living. Former Living Lighter on the Land blog posts have covered green energy topics including the costs/benefits of wood heat (March 4, 2013) and radiant heat (Dec. 19, 2012). In this edition of the blog, I will explore some of the options for efficient home heating with recommendations from my own experience at Armstrong.
No matter what energy source you use, the first and most important thing you can do to limit consumption and pollution is to insulate and air seal your home. Caulking and weatherstripping are simple and cost-effective ways to get started. According to the Alliance for Green Heat, heating results in an average of 345 million metric tons of carbon each year, whereas air conditioning, the second largest sources of emissions, accounts for about 147 million, both of which are reduced by investments in home insulation. It pays for itself too – insulating your home can lower energy bills by up to 50%. Renovations at the Armstrong House included the spraying of soy based foam insulation in the walls and ceilings and extensive sealing of cracks and energy leakage points like power outlets. We also installed a low emissive reflective insulation and housewrap. The goal is to create a continuous thermal barrier envelope that reduces air exchange and conductive heat loss. Remember that better quality insulation has higher R value (or thermal resistance), regardless of thickness. Options include spraying insulation from the inside, through holes in the walls, but better coverage is achieved by removing the siding on the outside. In the photo below, notice the dark areas on the roof where snow has melted. These are indicative of heat loss due to a discontinous thermal barrier.
One simple piece of technology to consider for your green home is a heat exchanger. We have a ventilation-specific heat exchanger on our air filtration system at Armstrong that is 70% efficient. This means: In winter, cold air from the intake pipe is first heated by outgoing air before it circulates through the house. In summer, the heat from warm outdoor air is removed by the outgoing exhaust stream. The two air streams remain separate throughout.
No matter what source of energy you use, the above suggestions can help to lower your costs and emissions, which is often more feasible for the homeowner than converting to another heat source. However, adding a wood or pellet stove to your existing system can be a sound investment. I am going to put my neck right out there and say that I am a fan of heating by wood. Not only does it lend a wonderfully cozy feeling to one’s home, it gives one the excuse to get outside and take a breath of fresh air while loading up an arm’s worth for the day. Controversy over wood burning’s contribution to air pollution seems to be dampened by arguments for its overall benefit to local economies and a reduction in the amount of oil and gas being transported from a distance. Plus, there has been a lot of progress in stove efficiency, prompted in part by a contest and partly by pending legislation from the Environmental Protection Agency, which proposes new standards for efficiency for stoves sold after 2015.
The Wittus Twinfire is an award-winner made by the same local company that generously donated our stove at Armstrong: it has an efficiency rating of 93% and can reduce wood use by 40%. The secret is called two-stage gasification: it heats wood in one compartment in the relative absence of oxygen, releasing combustible gases into a separate compartment where they meet air and efficiently release their energy with very little emissions.
We have burned about a cord and a half of wood in our stove this winter, and we harvested it from storm-blown trees on the property with the help of volunteers. Conservatively speaking, the heat produced by burning that amount of prime oak in our stove is equivalent to burning about 200 gallons of propane (our current fuel for the radiant heat system, until our solar thermal panels are installed). In other words, we have saved $600 by using wood this season and can expect to double that by the time winter is over. Use this handy fuel comparison chart to figure out how much you might save. Keep in mind that prices vary regionally, and that seasoned wood yields more energy (and less pollution) than freshly split, “greeen” wood. Cornell Cooperative Extension can help you to make the transition to wood burning and advise you on safety and maintenance of your wood stove, pellet stove, or boiler. They can also help to advise you on how to manage your woodlot for sustainable fuel harvests.
Brrr! It's cold outside. The Chickadees are as puffed up as they can be and are staying close by their caches of energy-rich seeds and berries. Chickadees will forage and add to their stores as winter progresses, providing hours of entertainment for an attentive birdwatcher. They and other small songbirds need to eat the equivalent of more than 10% of their bodyweight daily just to make it through each night. Perhaps for this reason, a number of birds congregate together in winter in what are known as "mixed foraging flocks" – Titmice, Juncos, Nuthatches, Creepers, Kinglets, and Downy woodpeckers join the Chickadee in sharing food resources while warning of potential predators. Where are all the other animals of winter? Should we be concerned for their welfare in this cold?
On the whole, any animal that makes this region its home is adapted to the extremes of temperature. For example, birds have circulatory systems that separate the cold blood in their legs from the rest of their bodies. The heartbeats of turtles slow to about one beat per minute, and even those living under ice can draw in oxygen through the cloaca. Frogs can freeze and thaw, and some insects produce antifreeze proteins in their blood. The honey bees in our hive at the "Working Backyard" demonstration site at the Armstrong Education Center do not hibernate but instead cluster together in a humming mass to maintain adequate body temperature. They feed upon their stored honey to obtain the energy needed for this near constant activity. With honey bees in precipitous decline, we opted not to harvest any of the sweet stuff for ourselves this year. (For more information, stay tuned to our Events Calendar, including a showing of the documentary "Vanishing of the Bees" on April 11).
The availability of winter food is a good predictor of which animal species hibernate and for how long. Insectivorous bats, grass-loving woodchucks (also known as groundhogs), and fruit-loving chipmunks will all sleep until Spring has sprung. Many more animals lie dormant for short periods and rise to forage on warm days, including skunks, squirrels, beaver, muskrat, and bear. Mammals that do not hibernate, like the Eastern coyote and White-tailed deer, must eat enough to maintain internal body temperatures similar to our own and are therefore surprisingly active in winter and more generalist in their diets. You have probably noticed that deer will eat just about anything vegetative. Coyotes eat a lot of fruit and rodents in addition to young deer. Thinking about the habits and living conditions of the animals sharing our landscape enhances ones connection to place and to the interplay of life, and is increasingly advocated as part of basic childhood education. For conservationists, tracks provide invaluable information about the distribution and health of animals and their habitat use.
I have taken much pleasure in following the tracks of a Red fox around Armstrong Preserve this week, with fresh prints daily leading to new insights about my secretive neighbor, whom I've never actually seen. I am touched by the play of its softly furred prints across the stark frozen surface of the Croton Reservoir, and the way each rear footfall is carefully placed to "direct register" over the preceding one. Tracking is an art and a skill that I have yet to fully develop, but as with most worthy endeavors, the joy is in the work, or in this case the journey. World-famous trackers Tom Brown Jr. and Susan Morse say they have never stopped learning so long as there is a track to follow.
Perhaps you have a local wildlife observation to share. Send me an email, or better yet, join Pound Ridge Land Conservancy this Saturday in welcoming Chris Nagy of the Wild Suburbia Project to the Armstrong Education Center Workshop Series. Chris will share with us Wild Suburbia's successful citizen science project documenting the presence of five large mammal species in Westchester County and surrounding areas.
Winter is here and with it come sightings of some extraordinarily beautiful visitors to our lands and waters. While it is true that most birds migrate south to warmer climes and richer feeding grounds, incoming migrants are just arriving from the Arctic and points north. The Hudson Valley E-Almanac last week reported an irruption of Snowy owls in our area and the rare presence of a Greater white-fronted goose, which had gotten off course when leaving the tundra and found itself amidst a flock of Canada geese. Late season migrants are generally larger-bodied birds, able to take the cold and to take advantage of available prey, seed stores, and habitat niches.
The open waters of our reservoirs are prime winter duck habitat, and clear sight lines make the shore particularly rewarding for viewing the bold breeding plumages and even courtship behavior of more than twenty different Anatidae species (see Audobon's list of birds in Westchester County). On a recent outing at the Cross River Reservoir, which is accessible by trail from both the Armstrong and Richards Preserves, I noted a raft of four Hooded mergansers and separately, a group of Buffleheads and Mallards with one Common goldeneye. From now through February I can expect to see many more, including the lovely Ring-necked duck, Canvasback, Lesser Scaup, and others, which sometimes raft up in the hundreds or even thousands. Were I to venture over to nearest salt-water shore, I might find spectacular seaducks like Common and King Eider, Harlequins, and Scoters bobbing in the surf.
Most of the birds I have mentionnned thus far would be termed "medium distance migrants," because they are resident year-round in North America and move on a predictable, seasonal rotation. True long-distance migrants are rarer and include the Artic tern and Whooping crane, along with a number of "our" small songbirds which actually spend the majority of the year in the neotropics and thus only summer with us here. Of course, some birds don't migrate at all, such as the familiar Northern cardinal, Downy woodpecker, and Black-capped chickadee. They rely on a local abundance of seed, fruit, and insects to sustain them through the winter, and will move short distances (a few hundred miles) if food becomes scarce.
Bird-lovers, hunters, and scientists have come up with various methods to predict the arrival and departure of each species in an area. One of those methods is based on a Cumulative WSI (Weather Severity Index) = – [average daily temperature oC ] + number of consecutive days with average temperature <0 o C + snow depth + number of consecutive days with snow cover. I recommend checking in with the E-Almanac or your local Audobon chapter for recent sightings. We happen to be smack in the middle of the 114th Annual Audobon Christmas Bird Count, an inventory of birds seen by backyard birders from all over the world. Sign up for a New York observation site here, and happy ducking!
I would bet that anybody reading this blog considers him or herself a conservationist, a steward of the land and waters supporting life on Earth. My job as Land Steward for the seventeen parcels protected by the Pound Ridge Land Conservancy is as varied as this landscape, and yet there are common threads that tie together this work and connect to other's efforts to protect plants and wildlife, including your own. In order to survive, all plants and animals need habitat: places to eat, sleep, reproduce, and withstand extreme climate events. They need connectivity between habitat, either as safe passages for travel or for gene-mixing to occur through reproduction (prolonging the long-term health of a species). Our main job as conservationists is to maintain the health of native landscapes so that habitat and connections exist to support the web of life on which we all depend.
Increasingly, my time on the land is taken up with control of plants and animals that are newcomers to our landscape. Not all non-native species are a cause for concern, but those that are classified as "invasive" threaten the health of ecosystems when they out-compete native species and alter the composition of communities. Species that are invasive have the potential to affect food webs and habitats in dramatic and irreversible ways, which is why conservationists worldwide are concerned about the increased mobility of organisms into and out of ecosystems that were previously more "closed" by natural barriers of time and space.
Even species that are technically native to our country as not necessarily desireable in the local landscape, which comes as a surprise to most people, who are accustomed to thinking in terms of political and state boundaries rather than ecological ones. The plants and animals in our community have adapted to one another and to prevailing environmental conditions through eons, and are unlikely to benefit from an influx of new genetic material in the system. In the case of plants especially, specially-raised cultivars can pollute the gene pool of local plants, impairing their ability to serve the animals that have co-adapted to depend upon them.
A prime example is Giant reed, or Phragmites, a local species that has been corrupted by genes from its cousin (native to the Pacific Northwest), resulting in an aggressively spreading rootstock that monopolizes wetlands and vastly reduces biodiversity. It is nearly impossible to find the local and non-invasive variety of Phragmites today. We have been working hard to combat its spread at the Isaacson Preserve, home to a globally rare fen habitat that still holds a healthy and specialized community of plants, insects, and birdlife. Even in PRLC's small protected preserves, life succeeds by adapting to changing conditions we have little control over and which are often too complicated for us to fully comprehend. What we do know is that native species and landscapes are resilient, and that many if not most of our native species can succeed with careful management and remediation of human impacts.
PRLC has been working with numerous local conservation partners to devise a strategy that will limit the further spread of invasive species into sensitive areas. You can help (and learn more) by staying tuned to this blog and by joining us at our Volunteer Work Sessions on the first Saturday of each month (10am-noon). At home, you can help wildlife immediately by replacing nursery-bred cultivars with native species (find out how here, and soon, on our website). Encourage your local municipality to do the same, using New York City as an example of a community that has outlawed the planting of non-native genotypes on city streets in order to protect wildlife in the city and beyond. We are all connected in today's world, and we must work together to protect the integrity of native landscapes to support local flora and fauna, or lose it forever.