Over-hunting of beavers has led to significant reduction of beaver population in some areas. In turn, it reduces predators that rely on beavers for food. Men who hunt beavers enjoy the sport but damage the local eco-system. They also take away the dams built by beavers which affect waterways.
The Beaver population was almost driven to extinction, and many predators lost their main source of food. Fish became an abundance though, but many rivers weren't controlled because the beaver's weren't there in some areas to build dams.
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