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Unformatted text preview: cross section of North America A Closer Look 8.1 Island Biogeography (island = any isolated habitat) Islands have fewer species, high endemism, lower diversity, higher rate of extinction Species richness is directly proportional to island size, inversely proportional to distance from mainland What can we learn from island biogeography? fragmentation of the landscape (through urbanization, forestry, agriculture, roads) creates ecological islands Species that need large habitats may not survive on "islands Species area curve: used to predict extinction rates and to plan for conservation of habitat When exotic species are introduced, what happens to native species? BIOGEOGRAPHY Figure 8.6 from page 137 in text showing the pattern of vegetation in relation to precipitation and temperature. Boundaries between types are approximate....
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- Fall '04