Wolves of Yellowstone | EARTH A New Wild | PBS LearningMedia
Wolves of Yellowstone | EARTH A New Wild | PBS LearningMedia
Gray wolves were reintroduced into Yellowstone National Park in 1995, which have since resulted in a trophic cascade through the entire ecosystem. After the wolves were driven extinct in the region nearly 100 years ago, scientists began to fully understand their role in the food web as a keystone species.
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