Wolves Change Geography

February 15, 2014 at 4:08 pm | Posted in Media, Nature, Science | Leave a comment

A short film about “trophic cascade“- the cascading consequences of changes in individual species populations – especially of top-of-the-pyramid predators.

After 70 years absence, wolves were reintroduced into Yellowstone National Park in the United States. They restored balance to grazing populations. This created a cascading effect that allowed the natural restoration of plant life, improvements in bear and rodent populations, and better river flows. Wolves changed the geography.

http://www.youtube.com/watch?v=ysa5OBhXz-Q

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