Earth Week: Bark beetles change Rocky Mountain stream flows, affect water quality

On Earth Week -- and in fact, every week now -- trees in mountains across the western United States are dying, thanks to an infestation of bark beetles that reproduce in the trees' inner bark. In Colorado alone, the mountain pine beetle has caused the deaths of more than 3.4 million acres of pine trees. What effect do all these dead trees have on stream flow and water quality? Plenty, according to new research findings reported this week.

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