An Organism that has an unusually large effect on an ecosystem is called a keystone species.
A keystone species helps in defining an entire ecosystem.
Keystone species have an unusually large effect on an ecosystem. It maintains the local biodiversity of an ecosystem. It influences other species in its habitat. It is an Organism that holds the entire system together. It has low functional redundancy. One of the best examples of keystone species is the sea otters.
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