There Were Too Many Deer In The Forest. So They Unleashed The Wolves Without Any Idea What Would Happen.
One of the most exciting scientific findings of the last 50 years is called a trophic cascade. A trophic cascade starts at the top of the food chain and tumbles to the bottom. One of the best examples of this happened in Yellowstone National Park in 1995 when wolves were reintroduced. Wolves are really good at eating deer. Basically, wolves see deer/elk like this: Humans killed all the wolves in Yellowstone National Park 70 years ago. Humans, being the controlling type in our relationship with Earth, tried to control the deer population. Deer started avoiding certain parts of the park — mostly the places where they could easily be trapped. And those areas started to regenerate! Barren parts of the land became lush forest filled with new animals. Beavers loved the new trees, so they started moving in too! The wolves started killing coyotes, and that allowed for mice and rabbits. Bald eagles and hawks decided they wanted in on the action too. Then grizzly bears moved back as well!
• Our Environment and its Degradation