Sources and Sinks: A Stochastic Model of Evolution in Heterogeneous Environments

Condensed Matter journal club

Sources and Sinks: A Stochastic Model of Evolution in Heterogeneous Environments

  • Event time: 11:30am
  • Event date: 14th January 2011
  • Speaker: (School of Physics & Astronomy, University of Edinburgh)
  • Location: Room 2511,

Event details

Abstract

We study evolution driven by spatial heterogeneity in a stochastic model of source-sink ecologies. A sink is a habitat where mortality exceeds reproduction so that a local population persists only due to immigration from a source. Immigrants can, however, adapt to conditions in the sink by mutation. To characterize the adaptation rate, we derive expressions for the first arrival time of adapted mutants. The joint effects of migration, mutation, birth, and death result in two distinct parameter regimes. These results may pertain to the rapid evolution of drug-resistant pathogens and insects.
PRL 105 2481804 (2010)

Authors

Rutger Hermsen and Terence Hwa