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Evolution of Cooperation

Evolution of Cooperation. How do you direct more benefit to cooperators vs. cheaters? How would you ever get a mutualism if both are costly?. Anaerobic methane oxidation (AOM). Sulfate Reducing Bacteria. methane is oxidized with sulfate as the terminal electron acceptor:

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Evolution of Cooperation

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  1. Evolution of Cooperation • How do you direct more benefit to cooperators vs. cheaters? • How would you ever get a mutualism if both are costly?

  2. Anaerobic methane oxidation (AOM) Sulfate Reducing Bacteria methane is oxidized with sulfate as the terminal electron acceptor: CH4 + SO42- → HCO3- + HS- + H2O MethanotrophicArchaea • Important reducer of greenhouse gas emissions • (90% of marine methane from marine sediments oxidized by AMO) • Unable to culture in lab – could be obligate syntrophy • Unclear which intermediates are exchanged

  3. Structured populations and Haystack model (John Maynard Smith)

  4. Simpson’s Paradox Chuang et al, Science 2009

  5. Prisoner’s Dilemma W(defector) (Turner & Chao, 1999. Nature)

  6. “Snowdrift Game”

  7. Cooperation in Myxococcus (Kuner & Kaiser, 1982)

  8. (Fiegna & Velicer, 2003; Velicer & Yu, 2003)

  9. (Fiegna et al., 2006. Nature)

  10. Monday (11/21):Class Presentations! Monday (11/28):Evolution of Pathogens

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