How Wolves Change Rivers
March 21, 2014
5m
Overview
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.
Directed by
Where to watch
In United States
Not available to stream, rent, or buy in United States right now.
More like this
A Toxic Love Story
2026
Above Majestic
2018
McQueen
2018
Capital in the Twenty-First Century
2019
Drew: The Man Behind the Poster
2013
Avatar: The Deep Dive - A Special Edition of 20/20
2022
The Class of ‘92
2013
Marvel's Behind the Mask
2021
42 Up
1999
Harmontown
2014
Naqoyqatsi
2002
Heart of a Dog
2015
Night Will Fall
2014
28 Up
1984
My Mom Jayne
2025
Come See Me in the Good Light
2025
American Boy: A Profile of Steven Prince
1978
Evil Influencer: The Jodi Hildebrandt Story
2025
35 Up
1991
Seduced and Abandoned
2013