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How Wolves Change Rivers

When wolves were reintroduced to Yellowstone National Park in the United States after being absent nearly 70 years, the most remarkable "trophic cascade" occurred. What is a trophic cascade and how exactly do wolves change rivers? George Monbiot explains in this movie remix.

Stashed in: Consequences, Wolf!, National Parks, Favorites, National Parks, Nature, Rivers

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Wolves are so clever, Janill.

It just shows how much of a balance nature is, one animal removed had so many consequences on the environment.

Yes -- and how it's hard to know the consequences of what might happen when things change. 

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