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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?
Students will watch this video as an example for how populations can change an ecosystem.
- Subject:
- Biology
- Environmental Literacy and Sustainability
- Life Science
- Material Type:
- Diagram/Illustration
- Provider:
- Films for Action
- Date Added:
- 12/02/2015