What changes in the wood bison's environment make it endangered?

There have been no major changes in the killer whale's environment, and they are not an endangered species.

Because they, like their American Bison kin, have been hunted to near extinction.

Why are you asking me ask someone with a brain unlike your self your a loser especially Anna

Everyone is either affected in a positive or negative way

Beaver dams cause local flooding. The wetlands upstream from beaver dams have a different biotype than if the dams were removed.