The phenomenon known as "spring creep" has put various species of U.S. wildlife out of balance with their traditional habitats, from the rabbit-like American pika in the West to the roses and lilies in New England, the environmental experts said in a telephone news briefing.
"The losers tend to be our native plant species," said Charles Davis of Harvard University, who studied plant changes in Concord, Massachusetts, where American conservationist and philosopher Henry David Thoreau lived a century and a half ago.
"Climate change is not affecting species uniformly," Davis said. "Certain groups are hit harder than others, and those species that are not able to respond to climate change ... are being hit the hardest.
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