Trophic Cascade and How wolves change rivers
This video is narrated by George Monbiot. Trophic cascades are powerful indirect interactions that can control entire ecosystems. Trophic cascades occur when predators limit the density and/or behavior of their prey and thereby enhance survival of the next lower trophic level. This video is narrated by George Monbiot. He explains how wolves arrives and change the environment including rivers.
