Keystone Species All ecosystems on Earth are formed of a delicate balance of species. When an ecosystem is at equilibrium, the relative numbers of organisms within each species remain stable. A food web is a graphical representation of the trophic (food-based) interactio... more
Keystone Species Keystone species have a major influence on the structure of their ecological community. The profound influence of keystone species occurs because of their position and activity within the food chain/web. In the sense meant here, a "major influen... more
