HOW WOLVES CHANGE RIVERS - Wolf Expert Anneka explains
Animal Watch
Jan 23, 2026 20:32
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Thirty years ago, wolves were reintroduced to **Yellowstone National Park** and triggered one of the most important ecological recoveries ever recorded. Through a powerful **trophic cascade**, wolves changed elk behaviour, restored riverbanks, brought back trees and beavers, and ultimately healed the rivers themselves.
Now, on the 30 year anniversary of that success, wolves are at risk once again. Politicians are pushing to remove protections under the **Endangered Species Act**, opening the door to widespread killing and population collapse.
If these protections are lost, the damage will spread far beyond Yellowstone, threatening the survival of the **Red Wolf** and **Mexican Wolf**, two of the most endangered wolves on Earth.
Wolf expert **Anneka Svenska** explains how wolves restored Yellowstone through a trophic cascade and why their future protection now hangs in the balance and debunks some crazy theories about the reintroduced wolves such as the Rewilded Wolves were Giant Canadian Wolves and nothing like the original ones.
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Presented by Anneka Svenska
Edited by Ellen Hope Cobb
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