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Wednesday, May 15, 2013

Trout invasion behind Yellowstone elk decline: study

Trout invasion behind Yellowstone elk decline: study
Paris (AFP) May 14, 2013 - Researchers trying to explain declining elk numbers in the Yellowstone National Park (YNP) placed part of the blame Wednesday on a previously unlinked phenomenon - a predatory trout invasion. In a vicious circle of human interference that underscores the delicate balance of nature, the team said the illegal introduction of lake trout more than 20 years ago changed the diet of a key Yellowst ... morehttp://www.terradaily.com/reports/Trout_invasion_behind_Yellowstone_elk_decline_study_999.html

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