KEY CONCEPT Every organism has a habitat and a niche.

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Presentation transcript:

KEY CONCEPT Every organism has a habitat and a niche.

A habitat differs from a niche. A habitat is all aspects of the area in which an organism lives. biotic factors abiotic factors An ecological niche includes all of the factors that a species needs to survive, stay healthy, and reproduce. food abiotic conditions behavior

Resource availability gives structure to a community. Species can share habitats and resources. Competition occurs when two species use resources in the same way. Competitive exclusion keeps two species from occupying the same niche.

Competitive exclusion has different outcomes. One species is better suited to the niche and the other will either be pushed out or become extinct. The niche will be divided. The two species will further diverge.

Ecological equivalents are species that occupy similar niches but live in different geographical regions. Madagascar South America