Keystone Species - Beaver

Keystone Species


A keystone species is an animal whose actions shape its ecosystem to the benefit of other species too. Without its keystone species, an ecosystem might not survive. Examples include:

  • The beaver, above, which builds dams that create wetlands.
  • The prairie dog, whose vast networks of burrows provide habitat for other animals also.
  • The wolf, which keeps deer and elk populations in check, which in turn prevents overgrazing of woodlands.