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(niche) The place and role occupied by an organism in a community, determined by its nutritional requirements, habit, etc. Different species may occupy a similar niche in different areas, for example, the grass species of the Australian grasslands, though different from those of the North American grasslands, occupy the same niche. Also, the same species may occupy a different niche in different areas. Generally the breadth of the niche varies depending on the adaptability of the species, the more adaptable species occupying a wider niche than the less adaptable or more specialized species.
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