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Global migration can lead to stronger spatial selection than local migration.

Feng Fu1, Martin A Nowaks

  • 1Program for Evolutionary Dynamics, Harvard University, Cambridge, MA 02138, USA.

Journal of Statistical Physics
|July 16, 2013
PubMed
Summary

Global migration surprisingly enhances spatial selection more than local migration in structured populations. This finding impacts understanding evolutionary dynamics and the evolution of cooperation under different mobility patterns.

Keywords:
Evolutionary dynamicsEvolutionary game theoryMathematical biologyPopulation structure

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Area of Science:

  • Evolutionary biology
  • Population genetics
  • Mathematical modeling

Background:

  • Population structure significantly influences evolutionary outcomes.
  • Mobility is a key factor in evolutionary dynamics within structured populations.
  • The comparative effect of global versus local migration on spatial selection remains largely unexplored.

Purpose of the Study:

  • To quantify the impact of global and local migration on the evolutionary competition between strategies.
  • To determine which migration pattern, global or local, more effectively promotes spatial selection and cooperation.
  • To investigate these effects within a finite island model.

Main Methods:

  • Utilizing a finite island model with islands arranged in a one-dimensional cycle.
  • Analyzing evolutionary competition between two strategies under global and local migration scenarios.
  • Deriving general results for conditions of weak selection and large population size, considering migration and mutation rates.

Main Results:

  • Global migration can lead to stronger spatial selection compared to local migration across a broad range of parameters.
  • The study provides a quantitative comparison of the two migration patterns' effects.
  • Surprisingly, global migration demonstrated a greater capacity to drive spatial selection.

Conclusions:

  • Different mobility patterns have distinct effects on evolutionary processes.
  • Global migration can be a more potent driver of spatial selection than local migration.
  • These findings offer valuable insights into the evolution of cooperation in structured populations.