3.1 Specialist and Generalist Species

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5 Terms

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Changing Habitats

Natural and Anthropogenic changes to the environment lead to changes in habitat

  • Organisms must be able to adapt to these quickly

  • Adaptable and heritable traits

  • Natural Selection

  • ex. Oil rigs, nstural disasters, pollution, invasive species

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Ecological Tolerance/Fundamental Niche

Range of abiotic environmental conditions an organism/population can endure before death

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Realized Niche

Specific set of biotic/abiotic conditions and resources a species actually uses

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Niche

A specific environmental role for an organism

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Generalists vs. Specialists

Generalists: Live in variety of environments, food

  • More ecological tolerance

  • Better adapted to changes environment

  • ex.

Specialists: Specific habitat and food

  • Narrow ecological tolerance

  • Better adapted in constant habitats

  • ex. Pika