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Earth Week: Whither Yellowstone's willows and the streams they shade?

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Willow catkin with dew in Yellowstone.

Willow catkin with dew in Yellowstone. Willows there and elsewhere depend upon a supply of water.

Credit: NPS


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Elk browsing on willows in Yellowstone

Elk browsing on willows in Yellowstone; Do elk or does water limit the growth of willows?

Credit: NPS


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old lake bed in Yellowstone covered with grass and willows growing along its wet edges.

An old lake bed in Yellowstone. Willows grow along its wet edges.

Credit: NPS


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Two researchers with instruments working on Yellowstone's northern range clip willows

Researchers working on Yellowstone's northern range clip willows as part of the study.

Credit: Tom Hobbs


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profile of an elk

What is the true role of elk in Yellowstone's ecosystem?

Credit: NPS


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An elk in a forest

At the center of Yellowstone: elk, willows, water, wolves--or all of them?

Credit: Wikimedia Commons


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