BIO 182 Chapter Notes - Chapter 47: Ecological Niche, Limiting Factor, Commensalism

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6 Nov 2016
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Niche is determined by physical environment as well as interactions with other species. Interactions can create positive, negative, or neutral outcomes for the species involved. Populations can only survive in certain environments. Coexisting species can only survive if one of the following is true: they use different resources, active at different times, there are no limiting resources. Related species generally have similar niches suggests niche is heavily influenced by evolution. Species interactions influence distribution and abundance of a population. Benefit has to outweigh cost in order for natural selection to favor a behavior. Competition interaction in which the availability of resources is not enough to support. Indirect interactions resource competition all of the individuals that need it. Intraspecific competition between individuals of the same species. Interspecific competition between individuals of different species struggle for existence. Overlapping niches generally result in one species either changing its niche or becoming extinct.

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