Reintroducing wolves to Yellowstone changed the entire geography of the park: as elk were displaced, saplings that would have been eaten by elk were spared, riverbank erosion was brought under control, and streams and rivers shifted their courses.
fact
Reintroducing wolves to Yellowstone changed the entire geography of the park: as elk were displaced, saplings that would have been eaten by elk were spared, riverbank erosion was brought under control, and streams and rivers shifted their courses.