Species Richness on Islands

Species Richness on Islands - Rate at which species become...

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1/31/11 Species Richness on Islands Islands provide excellent study tools for biogeography studies Islands – also include mountain tops, natural woodland fragments (any patch surrounded by unsuitable habitat for island species) MacArthur and E.O. Wilson developed a hypothesis of island biogeography to identify important determinants of species diversity on islands.
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1/31/11 Island Biogeography Newly formed oceanic island will receive colonizing species from a distant mainland Factor affecting number of species that will inhabit the island Rate at which new species immigrate to the island
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Unformatted text preview: Rate at which species become extinct on the island Island physical feature that affect these rates Size Distance from mainland Small islands have fewer immigrants and higher extinction rates Closer island will have more immigrants than a far island Immigration and extinction rates also depend of the number of species already on the island As species increase the immigration rate of new species declines because it is most likely that this species is already represented...
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Species Richness on Islands - Rate at which species become...

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