Island Biogeography

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Island Biogeography
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Island Habitats in Baltic Sea
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Reptile and Amphibian Species Area Curve for
Caribbean Islands
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Habitat Islands In the Great Basin
Bird Species
Mammal Species
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Ant species On New Guinea and Nearby Islands
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Species Area Curve

• S cAz
• where
• S number of species
• A area of island
• c constant for habitat type - forest, desert,
  grassland, etc.
• z slope of curve - predicted to be 0.263, but
  actually varies with dispersal ability

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Real Slopes for Species-Area Curves

• Oceanic islands birds - New Guinea islands
  z0.22
• beetles - West Indies z0.34
• land plants - Channel islands z0.37
• Habitat islands birds - Andes paramo z0.29
• birds - mtns of Great Basin z0.165
• mammals - mtns of Great Basin z0.326
• inverts -caves in West Virginia z0.72

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Robert MacArthur and E.O. Wilson - originators of
the Equilibrium Theory of Island Biogeography
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Ruffed Grouse by Audubon
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Ruffed Grouse male mating display
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Apostle Islands Lake Superior
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Krakatau before and after 1883 eruption
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Aerial photo of Anak Krakatau and Krakatau
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Krakatau today
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Mangrove islands off the Florida coast
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Mangrove Island Close-Up
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Dan Simberloff on MandolinNick Gotelli on Guitar
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Simberloffs defaunation experiment on Mangroves
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Simberloffs defaunation experiment on Mangroves
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Bracken Fern
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Bracken Fern - Australia
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Number of species found on Bracken Fern
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Picture Winged Drosophila
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Picture Winged Drosophila about 1000 species
from 1 ancestor
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Cichlid Diversity
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Cichlids from Lake Tanganyika (left) and Lake
Malawi (right)