2.3 island biogeography

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4 Terms

1
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evolution on islands

limited space and resources, creating unique conditions for evolution

2
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adaptive radiation

single species rapidly evolving into several new species to use different resources & reduce competition
ex. Galapagos finches

3
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why do birds beaks evolve

different beaks quickly evolve to fit variety of different food sources on islands

4
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island biogeography

habitat size and richness. species richness increases as the size of the habitat increases

  • ex. researchers counted the amount of bird species that inhabited reed islands in Hungary. as island area increased the bird species initially rose quickly and then began to slow.

  • the Galapagos islands are also another example