Dictionary of Human Evolution and Biology

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Ecological Niche

Role of a species in the ecological community; this term has been defined in several different ways.

1. activity range of each species with every dimension of the physical and biological environment included; this definition sees the niche as a multidimensional space.

2. physical space occupied by an organism.

3. functional role of the organism in the community, e.g. which trophic level it occupies.

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