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Dynamics of populations in a changing environment.
Journal article

Dynamics of populations in a changing environment.

  • Droz M Insitut de Physique Théorique, Université de Genève, quai Ernest Ansermet 24, 1211 Genève 4, Switzerland.
  • Pekalski A
  • 2002-06-13
Published in:
  • Physical review. E, Statistical, nonlinear, and soft matter physics. - 2002
English We present an individual-based model of a population that lives in a changing environment. The individuals forming the population are subject to mutations and selection pressure. Using Monte Carlo simulations we have shown that, depending on the values of the mutation rate and selection, the population may reach either an active phase (it will survive) or an absorbing phase (it will become extinct). We have determined that the transition between the two states (phases) is continuous. We have shown that when the selection is weaker the population lives in all available space, while if the selection is stronger, it will move to the regions where the living conditions are better, avoiding those with more difficult conditions. The dependence of the mean time to extinction on the rate of mutations has been determined and discussed.
Language
  • English
Open access status
closed
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Persistent URL
https://sonar.ch/global/documents/82673
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