A1 Journal article – refereed

Evolution of specialization under non-equilibrium population dynamics




List of Authors: Tuomas Nurmi, Kalle Parvinen

Publisher: ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD

Publication year: 2013

Journal: Journal of Theoretical Biology

Journal name in source: JOURNAL OF THEORETICAL BIOLOGY

Journal acronym: J THEOR BIOL

Volume number: 321

Number of pages: 15

ISSN: 0022-5193

DOI: 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. (C) 2013 Elsevier Ltd. All rights reserved.


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