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A phenomenological analysis of eco-evolutionary coupling under dilution
Vitor H Sanches1, Dhyan V H Kuraoka2, Pedro R Almeida2
1Instituto de Física, Universidade de São Paulo. São Paulo, SP, Brazil; Escola de Artes Ciências e Humanidades, Universidade de São Paulo. São Paulo, SP, Brazil.
Journal of Theoretical Biology
|December 3, 2017
Summary
This study models microbial evolution, showing how periodic dilution and Allee effects influence the coexistence of cooperators and cheaters in populations. The eco-evolutionary game model accurately predicts experimental phase diagrams.
Area of Science:
- Evolutionary Biology
- Microbial Ecology
- Game Theory
Background:
- Mixed microbial populations of cooperators and cheaters are studied using periodic dilution to understand resilience and adaptability.
- Experimental data show a stable equilibrium where cooperators and cheaters coexist.
Purpose of the Study:
- To phenomenologically analyze experimental data on microbial population dynamics from an eco-evolutionary game perspective.
- To extend a previous model by incorporating periodic dilution and Allee effects.
Main Methods:
- Developed an extended eco-evolutionary game model based on the Prisoners Dilemma.
- Included a dilution parameter and a term for Allee effects.
- Focused on pairwise interactions without assortative encounters, group, or kin selection.
Main Results:
- The model qualitatively and quantitatively describes the features of the experimental phase diagram.
- A stable coexistence equilibrium between cooperators and cheaters was observed.
- The model's success is discussed in terms of an effective payoff matrix.
Conclusions:
- The extended eco-evolutionary game model provides a robust framework for understanding microbial population dynamics.
- Periodic dilution and Allee effects are significant factors in the evolutionary stability of microbial communities.
- The model offers insights into the complex interplay between ecology and evolution in microbial systems.
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