How to Turn Your Yard Into an Ecological Oasis
By Tyler Wells Lynch
For years, Toni Genberg assumed a healthy garden was a healthy habitat. That's how she approached the landscaping around her home in northern Virginia. On trips to the local gardening center, she would privilege aesthetics, buying whatever looked pretty, "which was typically ornamental or invasive plants," she said. Then, in 2014, Genberg attended a talk by Doug Tallamy, a professor of entomology at the University of Delaware. "I learned I was actually starving our wildlife," she said.
The problem, Tallamy explained, is with the picky diets of plant-eating insects. Most of these bugs — roughly 90 percent — eat and reproduce on only certain native plant species, specifically those with whom they share an evolutionary history. Without these carefully tuned adaptations of specific plants, insect populations suffer. And because bugs themselves are a key food source for birds, rodents, amphibians, and other critters, that dependence on natives — and the consequences of not having them — works its way up the food chain. Over time, landscapes that consist mainly of invasive or nonnative plants could become dead zones.
Croplands can be just as destructive, making up nearly 20 percent of all land in the United States. And that doesn't even include the single largest irrigated crop in the country. Covering more than 40 million acres in the U.S., grass lawn consumes an area roughly the size of New England — land that, for the sake of habitat conservation, might as well be pavement.
Considering how little habitat and food these monocultures provide, and the incredible amount of resources they require, is there any wonder why the global insect populations are plummeting?
But there are solutions. One, at least in theory, is quite simple: Plant more native species. It's a calling that has spoken to a growing number of park managers, home gardeners, and landscapers — many of whom trace a direct line of inspiration to Tallamy. His research has helped overturn decades of harmful horticultural practice, forcing us to rethink how we tend to both public and private spaces.
In lieu of monocrops, landscapes with a larger, more diverse biomass of native species help support pollinators, sequester carbon, capture runoff, and rebuild habitats. One recent study found habitats with two or three native tree species are on average 25 percent to 30 percent more productive than monocultures, meaning they contribute that much more food and energy to an ecosystem. Habitats with five native tree species were 50 percent more productive. Wildlife is drawn to lands teeming with native plants.
For individuals who'd like to live a more sustainable lifestyle, the simple message of planting more native species is both productive and rewarding — a refreshing contrast to consumerist exhortations that blame the collective problem of environmental collapse on individual shopping choices. Like anything else, real change has to happen at the macro level, especially when it comes to turfgrass — a crop with deep cultural, even evolutionary roots.
Sociobiologists refer to the preference humans have for vast swaths of low-cut grass as "Savanna Syndrome." Open grasslands allowed our primitive ancestors to keep an eye out for predators. So even today, on a deep level, we feel safer when we can see to the horizon.
Until the Industrial Age, the demands of agriculture kept lawns at bay. They were seen mostly as status symbols that said a person had enough money to brush off the territorial demands of farmland. The invention of the lawnmower democratized the lawn, and further embedded its pathological hold on our psyches.
But lawns require huge quantities of water and often chemical treatments to maintain them — not to mention the emissions produced by two-cycle lawnmowers. According to the Environmental Protection Agency, running a lawnmower for one hour emits as much air pollution as driving a typical car 100 miles. This resource allocation becomes more and more difficult to justify as climate change continues to dry up once-productive habitats. As a monocrop, lawns displace landscapes that could benefit people, plants, animals, and insects. It's time for us to reconsider lawns on a grand scale, several researchers have concluded.
Considering how entrenched lawns are in the American imagination, to uproot them will require some give-and-take. Advocates say we need a culture shift as well as policies that support it.
"As climate change and droughts worsen, we might get to a point where there's political support to outlaw lawns," said Sarah B. Schindler, a professor of law at the University of Maine, who has written several papers about the legal authority of municipalities to ban lawns. "I do think we're seeing a change in norms, and I think part of that is tied to rising awareness of climate catastrophe."
Part of that work is simply raising awareness. Many people don't think about the possibility of their yards as anything but turfgrass. As Tallamy puts it, lawn is the default landscape, but it doesn't have to be. "People don't realize there's an alternative."
Choosing Native Plants
Some communities are beginning to impose alternatives. In California, Colorado, and Arizona, where water shortages are a growing crisis, cities offer rebates for each square foot of lawn replaced with native or water-saving landscapes—a process known as "xeriscaping." In wetter climes, Washington, DC, and cities in Nebraska, Washington state, Iowa and Minnesota have implemented rebate programs for the planting of rain gardens, which capture and infiltrate more runoff than grass. The city of Alexandria, Virginia, recently changed its municipal mowing to allow for the growth of meadows and glades in city parks.
Throughout the country, local groups are advocating for the planting of natives on roadsides, medians, campuses, and parks. Some, like Food Not Lawns, encourage homeowners and neighborhoods to replace lawns with edible plants to establish food sovereignty and food security within their communities. Others take a more clandestine approach by planting "guerrilla gardens" or tossing "seed bombs" into abandoned lots and properties where they don't have the legal right to garden.
"One thing that we've learned with our research is that there is room for compromise," Tallamy said. Native planting doesn't have to be all or none to make a difference. He gave the example of chickadee reproduction: If you have at least 70 percent native plant biomass in a given habitat, you can have sustainable chickadee reproduction. "That gives you 30 percent to plant perennials and exotics and other ornamental plants."
Tallamy's research into the relationship between native plants and insects has inspired gardeners to do more than just turn their yards into native oases. Many are now creating resources to empower others to do the same.
The National Wildlife Federation created a native plant finder web tool, which allows users to plug in a ZIP code to find trees, shrubs, and plants native to their region. Following her horticultural revelation, Toni Genberg created ChooseNatives.org, a resource to help users find, purchase, and learn about native plants. Since switching to natives, Genberg herself has seen all sorts of wildlife return to a property that, before, was only a suburban simulacrum.
Matt Bright founded the nonprofit charity Earth Sangha with the goal of propagating and restoring local native plant communities in the DC area. "We've set records for total plants distributed from our wild plant nursery for four years running," he said. "And overall, the trend has been towards more demand from all corners, whether that's from park managers and ecologists, homeowners, or landscaping companies."
Biodiversity Among Buildings
But shifting away from lawns is complicated by the fact that municipalities have long adopted rules called "weed ordinances," which require short ground cover for purely aesthetic reasons. This effectively mandates the planting and maintaining of lawns, as do many local zoning laws and HOA bylaws. And these rules aren't always taken lightly. In Michigan a few years ago, a woman faced jail time for growing a vegetable garden in her front yard instead of lawn.
People don't want to be told that they can't have their lawns, but they also don't want to be told that they have to have a lawn.
The elephant in the room, of course, is property rights. Limits and requirements can inspire backlash. As Genberg points out, "Americans don't want to be told what to do, especially when it comes to their properties."
That's why Tallamy has focused on talking to the public instead of advancing top-down regulation. Laws, especially bans, need public support to pass. To even think about regulating lawns you first need to change the culture around them. As people like Toni Genberg and Matt Bright show, Tallamy's message is resonating.
"What you do on your property affects everybody," Tallamy said. Nonnative or ornamental plants may not look like pollutants, but from an ecological standpoint, they are. Tallamy's research bears this out: A new paper from his team shows just how effective nonnative plants are at destroying local habitats.
"We compared caterpillar communities in hedgerows that were invaded with non-natives versus hedgerows that were mostly native," he explained. "There's a 96% reduction in caterpillar biomass when they're nonnative, so if you're a bird and you're trying to rear your young, you just lost 96% of your food."
But there's a flip side, he said. If you take the invasive species out and put the native plants in, you've just created 96 percent more food.
And this isn't some gardening trend reserved for America's suburbs and conservation lands. In Manhattan, the most densely populated urban center in the country, officials converted an abandoned railway line into a public park called the High Line, with a policy of planting at least 50 percent native species.
"There are monarch butterflies there, there are all kinds of native bees, which really surprised me," Tallamy said. "If you can do that in Manhattan, you can do it anywhere."
Reposted with permission from YES! Magazine.
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By Matthew J. Landry and Heather Eicher-Miller
When university presidents were surveyed in spring of 2020 about what they felt were the most pressing concerns of COVID-19, college students going hungry didn't rank very high.
Why It Matters<p>This is not just a matter of growling stomachs. This is a straight-up education and health issue.</p><p>When students don't really know if they'll be able to get enough to eat, it can lead to a series of problems that make it harder to stay in school. For instance, it can affect <a href="https://doi.org/10.1177%2F1359105318783028" target="_blank">academic performance</a> and <a href="https://doi.org/10.1186/s12889-019-6943-6" target="_blank" rel="noopener noreferrer">sleep quality</a>. It can also lead to <a href="https://doi.org/10.1177/1359105318783028" target="_blank" rel="noopener noreferrer">poor mental and physical health</a> outcomes for college students.</p><p>Food insecurity can also result in disrupted eating patterns if there is <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6627945/" target="_blank" rel="noopener noreferrer">not enough food or the variety</a> or <a href="https://bmcpublichealth.biomedcentral.com/articles/10.1186/s12889-019-6943-6" target="_blank" rel="noopener noreferrer">quality of what someone eats</a> is low.</p>
Campus Food Pantries<p>Previous strategies by <a href="https://www.gao.gov/assets/700/696254.pdf" target="_blank">colleges and universities</a> to fight hunger in their student bodies have varied widely. They include campus food pantries, emergency cash assistance and nutrition education through noncredit classes or workshopse.</p><p>These strategies were put to the test during the spring 2020 semester, when nearly <a href="https://hope4college.com/wp-content/uploads/2020/06/Hopecenter_RealCollegeDuringthePandemic.pdf" target="_blank">three in five students</a> said they had trouble meeting their own basic needs during the pandemic.</p><p>College food pantries saw <a href="https://www.utrgv.edu/newsroom/2020/05/01-utrgv-student-food-pantry-seeing-recent-increase-in-demand-during-covid-19.htm" target="_blank" rel="noopener noreferrer">big increases</a> in demand. Others said they <a href="https://www.theprospectordaily.com/2020/09/22/uteps-food-pantry-is-running-out-of-food/" target="_blank" rel="noopener noreferrer">were getting less donated food</a>. This made it even harder to meet the rising food needs of students.</p><p>Campus food pantries largely rely on local or regional food banks, which have been dealing with <a href="https://www.indystar.com/story/news/local/2020/10/04/indiana-food-banks-call-more-food-stamps-meet-publics-need/3523683001/" target="_blank" rel="noopener noreferrer">greater demand</a> than they are able to meet during the pandemic.</p><p>The many students who are attending college remotely will, of course, have less access to campus resources like food pantries.</p>
Federal Help<p>Other potential ways to get more food are government programs like the <a href="https://www.fns.usda.gov/snap/recipient/eligibility" target="_blank">Supplemental Nutrition Assistance Program</a>, known as SNAP. Yet the majority of able-bodied students are not eligible. Long-standing restrictions, like the <a href="https://www.fns.usda.gov/snap/students" target="_blank">college SNAP rule</a>, prevent full-time students from receiving these benefits.</p><p>Such regulatory hurdles were created under the assumption that most students can rely on their parents to get enough to eat. However, college students have vastly different levels of financial support. Some students can rely on their parents for everything and others cannot rely on their parents for anything.</p><p>Decreased reliance on parental financial support is <a href="https://ir.library.louisville.edu/jsfa/vol47/iss3/5/" target="_blank">especially common</a> for first-generation students and students of color, who now make up <a href="https://1xfsu31b52d33idlp13twtos-wpengine.netdna-ssl.com/wp-content/uploads/2019/02/Race-and-Ethnicity-in-Higher-Education.pdf" target="_blank" rel="noopener noreferrer">45% of enrolled college students</a>.</p><p>Under normal circumstances, many college students might rely on part-time jobs to pay for their food.</p>
Short-Term Solutions<p>Universities and colleges can make it a priority to ensure students are aware of all available campus resources and services. They can also potentially help students apply for federal assistance benefits.</p><p>Campus food pantries are not a fully effective and efficacious solution for the scale of college food insecurity, but they can be a good interim solution to increase access to food for students.</p><p>Campuses without food pantries can start one, making use of resources the <a href="https://cufba.org/resources/" target="_blank">College and University Food Bank Alliance</a> provides. Schools with food pantries can try to get them to <a href="https://www.swipehunger.org/5campuspantry/" target="_blank" rel="noopener noreferrer">reach more students</a>.</p><p>Universities and colleges can also lean on one another for support. The <a href="http://wp.auburn.edu/endchildhungeral/alabama-campus-coalition-for-basic-needs/" target="_blank" rel="noopener noreferrer">Alabama Campus Coalition for Basic Needs</a> is a great example of this. It brings together 10 universities across the state of Alabama collectively working to address student food insecurity.</p>
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