News of the WeekEcology

Western U.S. Forests Suffer Death by Degrees

Science  23 Jan 2009:
Vol. 323, Issue 5913, pp. 447
DOI: 10.1126/science.323.5913.447

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Summary

Mortality rates in seemingly healthy conifer stands have doubled in the past several decades, and often, new trees aren't replacing dying ones, forest ecologists report on page 521 of this issue of Science. Warmer temperatures and subsequent water shortfalls are the likely cause of the trees' increased death rate, they say.