How Wolves Change Rivers (A Physical Geography Lesson)

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.

Published Wednesday, February 19th, 2014

Published in


© 2016 Directions Media. All Rights Reserved.