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Although bark beetles delivered the knockout punch
USA Today (Society for the Advancement of Education), Dec, 2005
Although bark beetles (which thrive on water-stressed trees) delivered the knockout punch, the high heat that accompanied last summer's drought was the underlying cause of death for millions of pinyon pines throughout the Southwest, points out David D. Breshears, professor of natural resources at the University of Arizona, Tucson.
The resulting landscape will affect the ecosystem for decades.
COPYRIGHT 2005 Society for the Advancement of Education
COPYRIGHT 2006 Gale Group
