From accuweather.com:

For centuries, the wolf has inspired long-standing myths and legends across the world. In recent years, viral videos online have spun new tales about the wolf, attributing immense ecological changes to the canine, including a cascade of effects powerful enough to alter the flow of rivers in Yellowstone National Park.

While wolves are crucial predators in the Yellowstone food web, the story of a wolf-driven “trophic cascade” promoted in a popular online video is far from the complex reality of the park’s ecosystem.

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