B151xF08_L07EvolHist - Biology 1510/1511 Georgia Tech School of Biology Fall 2008 Evolution and History of Life • Evolutionary radiations •

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Unformatted text preview: Biology 1510/1511 Georgia Tech School of Biology Fall 2008 Evolution and History of Life • Evolutionary radiations • Mass extinction events • Macroevolutionary patterns • Natural selection and evolution • For a good overview of Earth history, see: Historical Geology Website (GPC) Biology 1510/1511 Georgia Tech School of Biology Fall 2008 Patterns of Evolution • Lineages come and go all the time. – Most of the species (>99%!) that have existed on earth are now extinct . • The fossil record contains several major speciation events, or evolutionary radiations (e.g., Cambrian & Cenozoic radiations). • The fossil record also contains a number of major extinction events (e.g., P/T and K/T). Biology 1510/1511 Georgia Tech School of Biology Fall 2008 Top Left: Campbell & Reece, Fig. 25.14 Lower Left: Miller, AI (1998) Science 281: 1157-1160 Right: Peters, SE (2008) Nature 454: 626-629 WRONG! Overall Biotic Diversity Biology 1510/1511 Georgia Tech School of Biology Fall 2008 Environmental & Planetary Factors • Sea level – Varies with climate (glaciation) and determines the extent of shallow shelf seas.shelf seas....
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This note was uploaded on 09/04/2009 for the course BIO 1510 taught by Professor Unknown during the Spring '07 term at Georgia Institute of Technology.

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B151xF08_L07EvolHist - Biology 1510/1511 Georgia Tech School of Biology Fall 2008 Evolution and History of Life • Evolutionary radiations •

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