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Posted Fri May 22 2009: from
BBC:
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Yosemite's giant trees disappearing http://apocadocs.com/s.pl?1243020166
The oldest and largest trees within California's world famous Yosemite National Park are disappearing.
Climate change appears to be a major cause of the loss.
The revelation comes from an analysis of data collected over 60 years by forest ecologists.
They say one worrying aspect of the decline is that it is happening within one of most protected forests within the US, suggesting that even more large trees may be dying off elsewhere.... Including 21 species of tree recorded by both surveys, the density of large diameter trees fell from 45 trees per square hectare to 34 trees, a decline of 24 percent in just over 60 years. White Firs (Abies concolor), Lodgepole Pines (Pinus contorta) and Jeffrey Pines (Pinus jeffreyi) were affected the most. Smaller size trees were unaffected.
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[Read more stories about:
forests, climate impacts]
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