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16 Cards in this Set
- Front
- Back
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MacArthur - Geographic ecology
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_____was defined by this person as the search for patterns of plant and animal life that can be put on a map
(just above landscape ecology) |
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Preston
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Found fewest bird species live on smallest islands and most species on largest islands
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Nisson et. al.
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Found island area was best single predictor of species richness amoung woody plants, carabid beetles, and land snails.
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As Pleistocene ended and climate warmed, _________and ________ habitats contracted to the tops of high mountains across the __________ ___________
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- Forest and alpine habitats
- American Southwest |
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Did the woodlands, grasslands, and desert scrub prefer higher or lower elevations after the Pleistocene?
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lower
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Montane
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Once continuous forest converted to series of island-like fragments associated with mountains. (one word)
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Lakes can be considered ________ __________. They differ widely by degree of _________.
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- habitat islands
- isolation |
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Tonn and Maguson
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Found the number of species increases with the area of an insular environment.
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Barbour and Brown
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Found POSITIVE relationship between area and fish species richness.
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_________and________ found that isolation _________ (increases/reduces) bird diversity on Pacific Islands.
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MacArthur and Wilson
reduces |
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_______show a clear influence of isolation on diversity, ________ do not
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birds
pteridophytes |
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Equilibrium Model of Island Biogeography
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Model explained patterns of species diversity on islands as result of immigration and extinction rates.
Immigration highest on new island w/no organisms Accumulation- rate of immigration would decline-fewer arrivals would be new species |
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Predicted rate of extinction would rise w/increaseing number of species on an island for 3 reasons:
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-More species- more potential extinctions
-As number of species increases, pop size of each must decrease -As number of species increases, so does potential competition. |
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LG near islands will support....
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highest number
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SM far islands will support
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lowest number
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Sm near and Lg far will support
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intermediate number
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