Keystone species is a species which has a disproportionately large effect on its natural environment relative to its abundance, a concept introduced in 1969 by the zoologist Robert
Keystone species maintain the local biodiversity of an ecosystem, influencing the abundance and type of other species in a habitat. They are nearly always a critical component of the local food web. ... Without its keystone species, an entire ecosystem would radically change—or cease to exist altogether.
A keystone species is an organism that helps define an entire ecosystem.
What is a keystone species, and why do they matter?
Keystone species hold together the complex web of relationships in an ecosystem. They can be animals, plants or microorganisms. Examples of keystone species include starfish, sea otters, wolves and elephants.
What is an example of keystone species?
Sea otters are responsible to keep a check on the population of sea urchins and there by prevent the destruction of kelp forests caused by the sea urchins.
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