Bio 201 F07 True lect 7 v3

Bio 201 F07 True lect 7 v3 - CELL PHONES OFF! Alternative...

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CELL PHONES OFF!
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Alternative species concepts • Your conception of species depends on what kind of biology you do • Geneticists, population biologists: biological species concept • Anatomists, paleontologists: morphological species concept • Systematists: phylogenetic species concept
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What is a systematist? • Biologist who specializes in classifying species – Like a taxonomist (e.g. Linnaeus) but more concerned with classification system rather than species descriptions • Modern systematics - classification based on evolutionary relationships
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Elaphe obsoleta (rat snakes) Problems with species concepts: Intra- specific variation
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The European mosquito, Anopheles maculipennis Problems with species concepts: one “morphological species” may represent multiple “biological species” Actually 6 species “sibling species”
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Phylogenetic Species Seaside sparrows
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Populations, Speciation, Species Populations Successful Reproduction Speciation Isolation: Allopatry, Sympatry Divergence Species concepts Biological species: Isolation Morphological species: Divergence Phylogenetic species: Common ancestry
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Bio 201 F07 True lect 7 v3 - CELL PHONES OFF! Alternative...

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