APES Unit 2.4 Ecological Tolerance

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4 Terms

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Ecological Tolerance / Fundamental Niche

The range of abiotic factors a species/individual can endure before death

  1. Optimal Range: Ideal conditions

  2. Zone of Physiological Stress: Surviving, not thriving

    • Infertility

    • Stunted Growth

    • Less Activity

  3. Zone of Intolerance: Death or Migration

    • Thermal shock

    • Suffocation

    • Lack of resources

    • Ideal pH = 7

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Purpose of Fundamental Niche

Establishes abiotic limits for the persistence of a species

Biotic Factors:

  • Predators

  • Competitors

  • Disease

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Realized Niche

Actual biotic/abiotic conditions an individual/species lives in

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Geographic Range

Areas a species lives in around the world