Solar Farms Look to Produce Something Apart From Power: Friendly Habitats for Wildlife – Slashdot
Posted by EditorDavid from the letting-the-sun-shine-in dept.
“Solar farms could blanket millions of acres in the United States over the coming decades,” writes the New York Times.
But “the sites that capture that energy take up land that wildlife needs to survive and thrive.” “We have to address both challenges at the same exact time,” said Rebecca Hernandez, a professor of ecology at the University of California, Davis, whose research focuses on how to do just that. Insects, those small animals that play a mighty role in supporting life on Earth, are facing alarming declines. Solar farms can offer them food and shelter by providing a diverse mix of native plants. Such plants can also decrease erosion, nourish the soil and store planet-warming carbon. They can also attract insects that improve pollination of nearby crops…
On a recent morning at the solar meadow in Ramsey, it was time to count insects… In solar pollinator habitat, Minnesota was an early leader among states. Since 2017, funded by the Department of Energy, Lee Walston [a landscape ecologist at Argonne National Laboratory] has been studying sites there and throughout the Midwest. “If you build it, will they come?” he asks in his research. So far, the answer is a resounding yes, if you grow the right plants. In a study published late last year, his team found that insect abundance had tripled over five years on test plots at two other Minnesota solar sites. The abundance of native bees grew twentyfold. The results come amid a global decline of wildlife that leaders are struggling to address.
Some of the most well-known insect species are in trouble: Later this year, the federal government is expected to rule on whether to place monarch butterflies on the Endangered Species List. North American birds, for their part, are down almost 30% since 1970. But at this site, called Anoka County Solar, acoustic monitoring has documented 73 species of birds, presumably attracted by the buffet of seeds and insects. Some build nests in the structures supporting the panels. Mammals are showing up, too… What makes this meadow possible is the height of the panels. A prairie restoration firm had told ENGIE, the owner and developer, that taller panels would allow for a sharp increase in native vegetation species, providing much more ecological diversity, said John Gantner, the director of engineering and delivery for ENGIE’s smaller-scale sites. The price of the additional steel and the native seeds were “insignificant to the overall project cost,” Gantner said. Over the life of the project, ENGIE has found, pollinator-friendly landscaping actually saves money because it needs far less mowing…
Nationwide, it’s unclear what portion of solar farms include any kind of pollinator habitat. The federal project that Walston is part of has a running rough count of just under 24,000 acres. That’s compared with about 600,000 acres of currently operating large-scale sites across the country, according to the Solar Energy Industries Association, with a sharp increase expected over the next couple decades.
The article adds that it also helps develoipers get their projects approved “at a time when communities are increasingly wary of vast solar farms. Developers are taking note…”
Others have also suggested “agrivoltaics” — where farming land is also used for generating renewable energy.
“This is lemma 1.1. We start a new chapter so the numbers all go back to one.” — Prof. Seager, C&O 351
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