What is a Keystone Species: Definition, Types, Characteristics, Importance, Examples, and Ecological Role

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 Introduction:      A keystone species is an organism that plays a disproportionately large role in maintaining the structure, stability, and functioning of an ecosystem. Another definition of keystone species is a species whose impact on its ecosystem is disproportionately large relative to its abundance or biomass. They are named after the keystone in a stone arch, the central wedge-shaped stone that holds the entire arch together. In 1969 zoologist Robert T. Paine used this architectural term as a metaphor to describe the critical role of these species. Although keystone species are often low in abundance, their removal can cause major changes throughout an ecosystem. Not all dominant or abundant species are keystone species. A keystone species is identified by the magnitude of its ecological impact rather than by its population size. Some keystone species are abundant, while others are relatively rare. Keystone in a stone arch History of keystone species concept...
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