4015_Tutorial_3

4015_Tutorial_3 - Biodiversity Chapter 2, continued A...

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Biodiversity Chapter 2, continued
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A species found in a particular region, but  nowhere else is said to be  ENDEMIC  to  that region
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There is a  high degree of endemism  found in areas that  Had biota that evolved in isolation. Ex: Madagascar, Australia, New Guinea, New Caledonia
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Isolated islands have high  proportions of endemic species,  but low species richness
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An exception to the general rule of  low species richness on isolated  islands is islands in the Pacific  Ocean that have high species  richness and high degrees of  endemism for corals, reef fishes,  snails and lobsters
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Percent endemic species  is high on the Tropics on land, so is species richness
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Tropical  marine and terrestrial  regions have greater species  richness  than  higher latitude  regions
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Exceptions : Seaweed  shows no relationship to latitude Richness of marine birds and mammals is  greater at high latitudes 
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Generally, larger land areas  support greater number of  species, have greater species  richness
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Island Biogeography
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Typically, the Tropics have larger  land areas, so they support the greatest number of species
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This note was uploaded on 07/07/2011 for the course BIOL 4015 taught by Professor Prowell during the Summer '08 term at LSU.

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4015_Tutorial_3 - Biodiversity Chapter 2, continued A...

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