How can we reconcile the evolutionary problem of cooperation? What can social amoebae tell us about the origins of multicellularity?
In this episode, we talk to Joan Strassmann and David Queller, professors at Washington University in St. Louis, about the evolution of cooperation and conflict. From social insects to humans, we can find instances of individuals seemingly sacrificing fitness for the good of the group. But, truly altruistic behavior poses a problem for evolutionary biologists because it challenges the assumption that natural selection favors individuals over groups. We talk with Joan and David about their work with the social amoeba, Dictyostelium discoideum. This species is known for its remarkable developmental cycle: when there is no more to eat, the starving amoebae aggregate into a slug-like organism, which then forms a fruiting body that releases spores in hopes of dispersing to a better place. The problem, evolutionarily, is that only a fraction of the cells in the fruiting body get to live on through offspring. This facultative lifestyle and the ability to combine genetically different cells makes D. discoideum a prime study species for understanding how relatedness impacts cooperation and conflict and the possible origins of multicellular organisms.
Towards the end of the episode, we also talk about Joan’s new book Slow Birding: The Art and Science of Enjoying the Birds in Your Own Backyard.
Cover art: Keating Shahmehri. Find a transcript of this episode on our website.
--- Support this podcast: https://podcasters.spotify.com/pod/show/bigbiology/supportEp 24: Mental Smoke Detectors
Ep 23: Beauty of the Beasts
Season 2 Preview
Ep 22: Whale Aware
Ep 21: Replaying the MP3 of Life
Ep 20: Ask Us Anything
Ep 19: Microbial Garden of Eden
Ep 18: Bug in the system
Ep 17: 1000 ways to make a baby
Ep 16: Rules of Life
Ep 15: Climate change: should they stay or should they go?
Ep 14: Plasticity? Sounds fishy.
Ep 13: Unraveling Genetic Knots
Ep 12: Containing Cancer with Squirrel Ecology
Ep 11: The Vagina Research Institute (Full Conversation)
Ep 11: The Vagina Research Institute
Ep 10: Tangling the Tree of Life
Ep 9: Information, Aliens, and the Origin of Life (Full Conversation)
Ep 9: Information, Aliens, and the Origin of Life
Ep 8: Immune System: Make Love not War (Full Conversation)
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