Species Interactions


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Species diversity


      What determines the number of species in a community?
      • Where is diversity greatest ?
      • What determines diversity on islands?

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Where is diversity greatest?

    The Tropics
    Why?
  • Greater rates of Speciation
    1. more resources (= larger pop'ns. & more niches)
    2. positive feedback (sp. interactions)
  • Lower Rates of Extinction
    1. Greater stability

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quiz

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Niches:
the roles species play in communities



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"Styles" species interact




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