Hunting Habits of Wolves Change Ecological Balance in Yellowstone - New York Times: "By JIM ROBBINS
Published: October 18, 2005
YELLOWSTONE NATIONAL PARK, Wyo. - Hiking along the small, purling Blacktail Deer Creek, Douglas W. Smith, a wolf biologist, makes his way through a lush curtain of willows.
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Joel Sartore/National Geographic
A portrait of the Yellowstone gray wolf.
Nearly absent for decades, willows have roared back to life in Yellowstone, and the reason, Mr. Smith believes, is that 10 years after wolves were introduced to Yellowstone, the park is full of them, dispersed across 13 packs.
He says the wolves have changed the park's ecology in many ways; for one, they have scared the elk to high ground and away from browsing on every willow shoot by rivers and streams.
'Wolves have caused a troph"
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