As global temperatures change, not all shifts will be equal. A new global analysis pinpoints the fast pace some species may have to move to remain in a suitable climate. Much of Earth's life forms are fine-tuned for specific ecosystems and their associated climates. Plunk a tree frog down in a harsh habitat it is not well adapted for, and it will fail to thrive—or even survive. Now, with regional climates shifting as a result of global warming, it is unclear just how far—and how fast—organisms will need to travel to keep up with moving climates.
http://www.scientificamerican.com/article.cfm?id=velocity-climate-change
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