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Ecology Review

Ecology Review. Highlights. According to our text niche is defined as: “The total way of life or role of a species in an ecosystem” What does this include?. What are fundamental niches?. How does a fundamental niche compare to a realized niche ?.

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Ecology Review

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  1. Ecology Review Highlights

  2. According to our text niche is defined as: “The total way of life or role of a species in an ecosystem” • What does this include?

  3. What are fundamental niches?

  4. How does a fundamental niche compare to a realized niche?

  5. How does this “negotiating for space” vary for generalist species versus specialist species?

  6. Why CAN’T they overlap? The Competitive Exclusion Principle

  7. How is this accomplished? • One species will have a competitive edge, and will gain a larger share of resources. • Other species will migrate to a new area, or become extinct. • Process of niche evolution is called resourcepartitioning. (Behavior separation that allows subpopulations of a single species to “share”) • Character displacement over TIME allows subpopulations to diverge into separate species.

  8. Darwin’s Galapagos finches Character Displacement

  9. More character displacement Natural Selection

  10. What is a keystone species?

  11. In Yellowstone Park…

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