yellowstone
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how the wolves saved yellowstone: a lesson in keystone species
A lesson in keystone species and biodiversity. When wolves are reintroduced to Yellowstone, incredible changes occur.
Posted: January 5 2017
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video: 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.
Posted: March 17 2016