I saw this and was like -- uhm, thought more people knew of this
Keeping leaves in your yard can bolster the number and variety of species around — and the perks go beyond just the fall season.
“We actually have a lot more things emerging than I think many homeowners think we do,” Dr. Ferlauto said. “In a square meter of yard where you leave your leaves, there’s on average almost 2,000 insects that will emerge over the course of the spring.”
That total number doesn’t include decomposers and detritivores like earthworms or millipedes, he said, nor the tiny insectlike soil animals called springtails. What it does include are arboreal arthropods — species that spend only a portion of their lives in the fallen leaves and the rest above ground: butterflies and
moths (about 20 will emerge), parasitic wasps (about 300), beetles (almost 400), more than 100 spiders and 1,000-plus flies of various kinds.
Rake up or blow away those leaves, or shred them with your mower, and the results plummet — as do the essential ecological services those organisms perform, including key pest-control roles by the spiders, parasitic wasps and certain beetles.
Thinking about raking freshly fallen leaves into a pile? Think again, scientists and naturalists say.
In recent years, some naturalists have called for an approach known as “leaving leaves” when they fall to the ground, which would return organic materials back to the soil.
“A forest has the richest soil there is, and that happens because leaves are falling off the trees and decomposing right there and organic materials are going back into the soil,” said Susan Barton, a professor and extension specialist in landscape horticulture at the University of Delaware. “We should be doing that in all of our landscapes, but we’re not.”