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It may not be that disturbing to the flies, however. Fruit flies, because of their fast rate of reproduction, may rapidly adapt to the changing climate. What's disturbing, Huey said, is that most other living creatures cannot evolve so quickly.
"Humans can adapt, to some extent, because of our intelligence and technologies," he said. But many creatures — especially such nonmobile and slow-growing plants like the sequoia tree — are likely going to be unable to adapt, Huey said.
"This is a clear signal on three different continents that climate change is occurring and that genetic change is going along with it," the biologist said.
In Friday's report, Huey, lead author Joan Balanya at the University of Barcelona, George Gilchrist at the College of William & Mary and colleagues describe how this fruit fly native to Europe — likely only about a dozen of them — was accidentally introduced in a fruit shipment to Chile. The invasion spread quickly across Chile and, in 1982, a Canadian scientist collecting flies in Port Townsend was surprised to find among his insect booty these foreign invaders. "They likewise spread quickly here and now can be found from just north of Santa Barbara into British Columbia," Huey said.
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http://www.chron.com/disp/story.mpl/nation/4158663.html