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Climate change puts ecosystems on the run
Global warming is causing climate belts to shift toward the poles and to higher elevations. To keep pace with these changes, the average ecosystem will need to shift about a quarter mile each year, says a new study by scientists at the Carnegie Institution at Stanford University and at the University of California, Berkeley. |
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Study shows loss of 15-42 percent of mammals in North America
If Earth is headed for a mass extinction like the previous five, in which more than 75 percent of all species were wiped out, then North American mammals are one-fifth to one-half the way there, according to a University of California, Berkeley, and Pennsylvania State University analysis. |
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