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Understanding Protist Population Growth and the Gause Principle

Explore a virtual lab simulation focusing on the population growth of ciliated protists, particularly Paramecium species, and the factors influencing their growth, such as food, water, shelter, space, and competition. Learn about carrying capacity, interspecies and intraspecies competition, and the Principle of Competitive Exclusion, which dictates that the species with the greatest growth rate will dominate in resource competition scenarios.

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Understanding Protist Population Growth and the Gause Principle

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  1. Protist Population Growth Lab The Gause Principle

  2. Do a search … • Virtual protist population lab • Or • http://www.mhhe.com/biosci/genbio/virtual_ labs_2K8/labs/BL_19/

  3. Paramecium: A ciliated protist • Freshwater • Many varied species Parameciem caudatum Paramecium aurelia

  4. Given time and unlimited resources…….. • Exponential Growth

  5. But…….. • Limiting factors affect population growth • Food • Water • Shelter • Space • competition

  6. Carrying Capacity • The maximum and stable population that an environment can sustain

  7. Competition • Intraspecies: within a species • Interspecies: within two or more species

  8. Principle of Competitive Exclusion • When two species compete for resources the one with the greatest growth rate will outcompete the other. • No two species can occupy the same niche

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