How Wolves Change Rivers
Check out this brilliant short film from Sustainable Human about the effects of reintroducing wolves to Yellowstone National Park, where they had been absent since the last one was killed in 1926 until their reintroduction in 1995.
While recent research suggests that the real story isn’t quite as neat and tidy as the one presented in the film (trophic cascades and food webs are incredibly complex! Who knew?!), it’s a great reminder of how every thread of an ecosystem plays an important part in weaving nature’s tapestry.