2 22 10 Speciation

2 22 10 Speciation - Georgia Tech School of Biology...

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Georgia Tech School of Biology Spring 2010 Biology 1510 Speciation What is a species? Species concepts Reproductive Isolation Modes of speciation Patterns of Speciation
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Georgia Tech School of Biology Spring 2010 Biology 1510 What is a species?
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Georgia Tech School of Biology Spring 2010 Biology 1510 Biological species concept - a group of individuals that actually or potentially interbreed in nature Mayer 1942 Problems …… - Many species reproduce asexually - Many species can interbreed to produce hybrids - How do you determine whether or not species actually interbreed? - How do you classify the potential to interbreed?
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Georgia Tech School of Biology Spring 2010 Biology 1510 Dealing with hybrids Hooded crow Carion crow TWO SPECIES OR SUBSPECIES??? Hybrid progeny
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Georgia Tech School of Biology Spring 2010 Biology 1510 What is your goal for systematic classification? - reflect differences in behavior, habitat, ecological niches - represent processes of evolutionary history - apply to the largest possible variety of organisms ecological species concept phylogenetic species concept morphological species concept
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Georgia Tech School of Biology Spring 2010 Biology 1510 Species Concepts Q: Genetically, polar bears (2b) group among modern and prehistoric brown bears. By what species concept should polar bears NOT be classified as a separate species? A. Biological species concept
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2 22 10 Speciation - Georgia Tech School of Biology...

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