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Evolution of Specialization Under Non-Equilibrium Population Dynamics

Tuomas Nurmi, Kalle Parvinen, Evolution of Specialization Under Non-Equilibrium Population Dynamics. Journal of Theoretical Biology 321, 63–77, 2013.

http://dx.doi.org/10.1016/j.jtbi.2012.12.018

Abstract:

We analyze the evolution of specialization in resource utilization in a mechanistically underpinned discrete-time model using the adaptive dynamics approach. We assume two nutritionally equivalent resources that in the absence of consumers grow sigmoidally towards a resource-specific carrying capacity. The consumers use resources according to the law of mass-action with rates involving trade-off. The resulting discrete-time model for the consumer population has over-compensatory dynamics. We illuminate the way non-equilibrium population dynamics affect the evolutionary dynamics of the resource consumption rates, and show that evolution to the trimorphic coexistence of a generalist and two specialists is possible due to asynchronous non-equilibrium population dynamics of the specialists. In addition, various forms of cyclic evolutionary dynamics are possible. Furthermore, evolutionary suicide may occur even without Allee effects and demographic stochasticity.

BibTeX entry:

@ARTICLE{jNuPa13a,
  title = {Evolution of Specialization Under Non-Equilibrium Population Dynamics},
  author = {Nurmi, Tuomas and Parvinen, Kalle},
  journal = {Journal of Theoretical Biology},
  volume = {321},
  pages = {63–77},
  year = {2013},
  ISSN = {0022-5193},
}

Belongs to TUCS Research Unit(s): Biomathematics Research Unit (BIOMATH)

Publication Forum rating of this publication: level 2

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