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Cougar predation key to ecosystem health

10-24-2006 · EurekAlert!

The general disappearance of cougars from a portion of Zion National Park in the past 70 years has allowed deer populations to dramatically increase, leading to severe ecological damage, loss of cottonwood trees, eroding streambanks and declining biodiversity. Researchers are calling it a "trophic cascade" of environmental degradation.

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Keywords: cougar, predation, key, ecosystem, health

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