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Biology  /  Bio 3605  ·  Atom · ~20 seconds

Competitive Exclusion and the Ecological Niche

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The competitive exclusion principle holds that two species occupying the identical ecological niche, the full resource-and-condition set a species uses, cannot stably coexist.

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Two species needing the same limited food source and nesting site cannot both persist there long-term.

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Overlapping-habitat species routinely coexist by dividing resources along another axis — full niche overlap, not habitat overlap, triggers exclusion.