Posted by: Michael Ritter PhD | January 27, 2009

Tree Deaths Double in Western United States says the USGS

tree_death

Red fir, Sequoia National Park, California. Photo credit: Nate Stephenson, U.S. Geological Survey.

A recent United States Geological Survey-led  study published in Science reports on an unsettling trend of tree death rates in western US old-growth forests. The study found that the rate of tree death has doubled over the last two decades across a variety of forest types, tree species and sizes, and at all elevations across the western United States. Regional increases in temperature appears to be correlated with tree death rates.

For more see:

The Physical Environment links: The Forest Biome

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