
A more long-range study in the mountains of western Europe shows a similar result. BBC news reports that scientists studied distributions of 171 plant species between 1905 and 2005 and found that, on average, populations have relocated their optimum ranges 29 meters higher in elevation each decade in response to climate change. Abstract: Lenoir et al. Science. 27 June 2008. 320(5884): 1768-1771.
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