The Ecological niche reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Ecological niche

In ecology, a niche is a term describing the position of a species or population in an ecosystem.

The description of a niche may include descriptions of the organism's life history, habitat, position in the food chain. According to the principle of mutual exclusivity, no two species can occupy the same niche in the same environment.

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