What are keystone species and why are they important? - National Environmental Treasure

A keystone species is a plant, animal, fungi, or even bacteria that has a disproportionately large impact on their ecosystem.

Sea otters are rebounding from near extinction. Not everyone is happy.

Role of Keystone Species in an Ecosystem

Article - What Is A Keystone Species, PDF, Ecology

The American Bison: A National Treasure, by Animal Learns

keystone species Archives - National Environmental Treasure

10 reasons why Bristol Bay deserves protection

What Is a Keystone Species and Why Are They So Important? - Utopia

The American chestnut: Restoring a keystone species

Keystone species, facts and photos

Keystone Species: Definition, types and significance

Keystone species, facts and photos

What are keystone species and why are they important? - National Environmental Treasure

The importance of Keystone Species, by Barry Nerhus

10 Keystone Species Examples and the Important Role they Play in Every Ecosystem