Video: How wolves can alter the course of rivers
4:33
Video: How wolves can alter the course of rivers
Feb 18, 2014
TEDKate Torgovnick May
People actively hunt wolves to protect their livestock. But in some places wolves are being hunted towards extinction. Wolves are a critical keystone species in a healthy ecosystem. By regulating prey populations, wolves enable many other species of plants and animals to flourish. Without predators, such as wolves, the system fails to support a natural level of biodiversity. Just like beavers, wolves aide the ability for the forests and grasses to grow and water to accumulate. Wolves are importa
4:12
People actively hunt wolves to protect their livestock. But in some places wolves are being hunted towards extinction. Wolves are a critical keystone species in a healthy ecosystem. By regulating prey populations, wolves enable many other species of plants and animals to flourish. Without predators, such as wolves, the system fails to support a natural level of biodiversity. Just like beavers, wolves aide the ability for the forests and grasses to grow and water to accumulate. Wolves are importa
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How Wolves Change Rivers
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The “How Wolves Changed Rivers” story became environmental gospel. One problem: the science doesn’t actually support it. Colorado State researchers examined 20 YEARS of wolf recovery inYellowstone and the results are clear: wolves are not the magical cure all they are made out to be. The trophic cascade theory? Oversimplified at best, misleading at worst. Here’s what ACTUALLY matters: SCIENCE-BASED MANAGEMENT WITH HUMANS IN THE ECOSYSTEM While Yellowstone’s hands-off approach failed, Montana’s a
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Wolves didn't touch the rivers—but they changed them. By altering elk behavior, wolves allowed vegetation to grow back. Willows returned. Beavers came back. Rivers stabilized. This is called a trophic cascade, and it's one of the most famous examples of ecosystem restoration. The 2026 study says the effect was smaller than claimed, but the basic science still holds. Nature is connected. 🐺🌊 #TrophicCascade #WolvesChangeRivers #YellowstoneEcosystem #WolfScience #EcosystemRestoration How wolves c
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