In Chester County, Pennsylvania, about 40 miles northwest of Philadelphia, Beaver Run carves a triangular piece of bottomland as it turns east to join French Creek. A gnarled old American sycamore grows in the narrow fringe of native forest bordering the stream. On a cold, gray winter’s day, agroforester Austin Unruh pulls on a woolen beanie and points out the variety of saplings poking through the straw-colored carpet of dormant grasses beyond the thin band of forest.
“Over there are American persimmons and pawpaws,” he says, identifying two of the native fruit-bearing trees he planted on the 3-acre corner of land. Scattered among them are ornamental natives such as red-twig dogwood and willows, which fetch a good price in the floral trade, he explained. With a state-funded grant from the nonprofit Stroud Water Research Center in Avondale, Pennsylvania, Unruh leased the land from Lundale Farm to demonstrate how agroforestry can be employed to create a new kind of pollution-fighting landscape called a “working buffer.”
A few hundred years ago, forests grew naturally along waterways in the eastern United States, but many have been razed to make way for towns, cities, cattle, and crops. Today, strips of streamside land replanted with native floodplain trees and shrubs, called riparian forest buffers, are essential to the health of creeks and rivers. These buffers help stabilize stream banks and decrease flooding while trapping and filtering pollutants that would otherwise end up in local waterways. Until recently, however, restoring a streamside buffer in rural areas meant taking farmland out of production.
Read more at Yale Environment 360
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