Movie Details
Original Language:English
Production Companies:Sustainable Man
How Wolves Change Rivers on the Web:Official Website
How Wolves Change Rivers
5 minDocumentary
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.