"MINNESOTA — Almost everywhere he looks, Lee Frelich sees the fingerprints of climate change on the forests he has studied since he was a boy half a century ago.
Birds from southern Minnesota are now popping up far north in Ely, on the edge of the famous Boundary Waters Canoe Area Wilderness. Splashes of red maple leaves are now visible each fall amid the pines and spruces of the iconic North Woods, where they once would have been harder to find.
Frelich, the director of the University of Minnesota's Center for Forest Ecology, thinks that if the state's warming trend remains unchecked, such subtle changes will become starker and more devastating in the decades ahead. He thinks the boreal forests that soak up huge amounts of carbon dioxide from the atmosphere could disappear entirely, taking with them a third of the state's native species of trees, flowers, birds and pollinators. "