狼如何改变河流

George Monbiot narrates how reintroducing wolves to Yellowstone after about 70 years set off a trophic cascade. The wolves changed deer behavior, vegetation recovered, and rivers changed course.

Why HN likes it: HN cites it as the go-to example of how one keystone species can reshape an entire ecosystem.

“You need to learn about trophic cascades. Here's a quick intro”