Life: The Science of Biology 12e Student Resources is no longer available and it was replaced by Biology and Life Sciences.
Media Clip 55.2: How Wolves Change Rivers
This video describes the remarkable trophic cascade that occurred when wolves were reintroduced to Yellowstone National Park in the United States after being absent for nearly 70 years.
Textbook Reference: Key Concept 55.3 Communities Are Complex Networks of Species Interactions