Article courtesy of Deborah Byrd | February 28, 2014 | EarthSky | Shared as educational material
Do yourself a favor and watch this video on how wolves change rivers. It will make you happy.
When wolves were reintroduced to Yellowstone National Park in the United States after being absent nearly 70 years, the most remarkable trophic cascade occurred. The wolves have affected not just the surrounding living ecosystems, but the physical geography of the land itself. George Monbiot explains in this movie remix.