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?
“How Wolves Change Rivers” is a four and a half-minute clip about the unexpected effects of reintroducing wolves into Yellowstone National Park in the early nineties. This video explains the trophic cascade, or trickle down effect, that happens in all food chains
When looking into the more long-term effects of the hunting, a plethora of positive side effects begin to emerge: increased bald eagle populations, stabilized river banks, reforestation, increased vegetation, and more. Because one deer dies, wolves, bears, beavers, birds and nature in general flourish.