How does population of Tiger or any animal affect environment?

Answer 1

Say that the Bengal tiger, which lives in the rainforest, became extinct: because it is at the top of the food chain, no animals would die because that energy source is gone. However, animals that the tiger eat such as a deer, would become overpopulated, or there would be too many of them due to the fact that their main predator is gone. Because there are more deer now, the grass that the deer eats goes away faster, eventually causing the deer to die from starvation. It goes on and on because it is a chain reaction, like dominoes. If you take one thing away, everything else starts to fall apart. This is why we need to make sure endangered animals don't go extinct, because it will effect their ecosystem in a much greater way then we think.