New Scientist: They say what doesn't kill you makes you stronger, but that's not true for the US's iconic aspen trees. They appeared to survive a severe drought between 2000 and 2003, but it is now clear that it fundamentally weakened them. If the same is true for other tree species, climate change may be pushing many forests perilously close to a tipping point. Ever since the drought in western North America, aspen trees have been dying at an alarming rate, a phenomenon now known as sudden aspen decline....
URL: http://www.newscientist.com/article/dn22589-dying-aspen-trees-sound-alarm-for-worlds-forests.html?cmpid=RSS%7CNSNS%7C2012-GLOBAL%7Cclimate-change
Enclosure: http://www.newscientist.com/data/images/ns/cms/dn22589/dn22589-1_300.jpg
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