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Yellowstone Ecosystem Needs Wolves and Willows, Elk and...Beavers?
The missing link in the Yellowstone ecosystem? The beaver, scientists have found.
Credit: NPS
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Scientists Tom Hobbs, Kristin Marshall and David Cooper study willows and beavers in Yellowstone National Park.
Credit: Colorado State University
A long-ago beaver dam, a rare sight today, along a stream in Yellowstone National Park.
Credit: NPS
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Locations of the project's experimental sites on Yellowstone's northern range.
Credit: Kristin Marshall
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Summertime at the team's upstream research site along East Blacktail Deer Creek.
Credit: Kristin Marshall
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Snow covers East Blacktail Deer Creek in winter. Still, most browsing occurs then.
Credit: Kristin Marshall
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Using calipers, scientist Kristin Marshall measures the diameters of browsed willow stems.
Credit: Kristin Marshall
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