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KEY CONCEPT Every organism has a habitat and a niche.

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.

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KEY CONCEPT Every organism has a habitat and a niche.

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  1. KEY CONCEPT Every organism has a habitat and a niche.

  2. 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

  3. 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.

  4. 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. • Competitive exclusion has different outcomes.

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

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