Forests are migrating up mountain peaks

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By Paul Voosen, Science. 

Excerpt: It’s a hallmark prediction of climate change: As the world warms, trees will migrate not just toward the poles, but also up the slopes of mountains, eating away at fragile alpine ecosystems. Although advancing tree lines have been tracked at individual mountains, a new large-scale study has found something surprising: Over a span of 4 decades, the largest upward movement of these forests has come not near the poles, as one might expect, but instead in the tropics, where monitoring has been far more limited.... 

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