North Woods landscape is "under attack" | StarTribune.com
"Lots of other factors are going to reinforce the effect of climate change on forests, not just warmer temperatures," said study author Lee Frelich, director of the Center for Hardwood Ecology at the U.
He called the conspiring environmental pressures a "triple double whammy."
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The impact will repaint the Minnesota landscape, it said, with the border between prairies and woods shifting 60 to 300 miles to the northeast.
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"Rapid warming, especially in winters, has a springboard effect for insects and diseases," he said.
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To be sure, some effects of warmer climate could be positive, the paper notes. More carbon in the air from greenhouse gases could make it easier for trees to grow richer foliage without losing as much moisture, and more nitrogen in the atmosphere could act as fertilizer to northern forests. But researchers said those benefits are modest, and any gains in growth will be more than offset by less regular rainfall and other change.
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The result, said Frelich, will be the "savannafication" of many northern areas, which will become grasslands with scattered trees and brush rather than forests, and will resemble parts of central Iowa or even Missouri.
1 comment:
Frehlich should look at actual data instead of unrealistic model projections. See: http://www.appinsys.com/GlobalWarming/RS_MinnesotaUSA.htm
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