Competitive exclusion principle

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competitive exclusion principle

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Definition

Glossary of Ecology (6th ed.) by Krebs (2009)

Glossary of "Evolution (4th ed.)" by Futuyma & Kirkpatrick (2017)

  • The theoretical assertion that one of two ecologically identical species will eventually replace the other by competition.

Glossary of "Environmental Science: Earth as a Living Planet (2nd ed.)" by Botkin & Keller (1998)

  • The idea that two populations of different species with exactly the same requirements cannot persist indefinitely in the same habitat--one will always win out and the other will become extinct. Which one wins depends on the exact environmental conditions. Referred to as a principle, the idea has some basis in observation and experimentation.

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