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BP: Fachverband Biologische Physik

BP 44: Stochastic Dynamics of Growth Processes in Biological and Social Systems (accompanying session, joint DY/BP/SOE)

BP 44.3: Vortrag

Freitag, 4. April 2014, 10:30–10:45, GÖR 226

Cooperation in suddenly changing environments — •Karl Wienand¹, Jonas Cremer², Anna Melbinger², and Erwin Frey¹ — ¹Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universität München, Theresienstrasse 37, 80333 München, Germany — ²UC San Diego, 9500 Gilman Dr., La Jolla, CA 92093, U.S.A.

The interdependence of evolutionary and growth dynamics shapes the evolutionary fate of populations. This is especially the case in microbial populations, where volatile population sizes and capricious environments are the rule rather than the exception. A suddenly changing carrying capacity, which periodically oscillates between abundance and scarcity of resources, represents such changing environment and causes the population size to grow and shrink. The variation in size, in turn, affects the evolutionary dynamics. Studying this complex interplay, we find most oscillating environments enhance demographic fluctuations and cooperative behavior.