Invasive earthworms at the root of sugar maple decline
A new study suggests that non-native worms are eating up the forest floor, causing sugar maples to die back and perhaps harming other forest dwellers.
The worms crawl in, the worms crawl out, and corpses aren't the only casualties. A Michigan Technological University scientist has fingered non-native earthworms as a primary culprit in the decline of an iconic American tree.