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Posted Fri Jun 6 2008: from BioScience, via Science Daily (US):
Western U.S. Forests At Risk: Complex Dynamics Underlie Bark Beetle Eruptions
Biological interactions involving fungi as well as trees and competing insects drive bark beetle outbreaks. The processes are sensitive to a forest's condition and the local climate, but prediction is difficult because the processes turn on multiple critical thresholds.... Forest management that favors single tree species and climate change are just two of the critical factors making forests throughout western North America more susceptible to infestation by bark beetles, according to an article published in the June 2008 BioScience.
[Read more stories about: forests, ecosystem interrelationships]

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