美国科学60秒 SSS 2012-11-12

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Researchers use climate models to forecast the effects of warming on Arabica coffee trees in Ethiopean,their native range. Under the best case scenario¹, meaning fewer emissions² and less warming. Only a third of today's range would still be suitable for coffee by 2080.In the worst case, wild Arabica could be nearly wiped out in the region. That's because coffee trees are sensitive to temperature. The researchers say, they may not be able to colonize³ new areas fest enough to beat climate change. That's assuming no direct human impact, like clearing land for grazing, which is already a problem though. Of course the coffee in your cup doesn't come from wild trees. But wild coffee forest have a much bigger gene⁴ pool than cultivated crops, meaning more * diease, path and drown. Preserving that diversity might just be grounds to act on climate change.

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