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Evolutionary stagnation due to pattern-pattern interactions in a coevolutionary predator-prey model

N J Savill1, P Hogeweg

  • 1Bioinformatics and Theoretical Biology, Utrecht University, The Netherlands. njs@behold.biol.ruu.nl

Artificial Life
|April 1, 1997
PubMed
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Predators and prey form distinct clusters, called quasi-species, in phenotype space. The interaction between these phenotype clusters and spatial patches inhibits predator evolution.

Area of Science:

  • Ecology
  • Evolutionary Biology
  • Theoretical Biology

Background:

  • Coevolutionary predator-prey systems are fundamental to ecological dynamics.
  • Understanding the interplay between spatial structure and evolutionary processes is crucial.

Purpose of the Study:

  • To investigate a spatially structured coevolutionary predator-prey model.
  • To analyze the formation of phenotype clusters (quasi-species) and spatial patches.
  • To determine how these patterns influence evolutionary trajectories.

Main Methods:

  • Development of a one-dimensional spatially structured model.
  • Simulation of coevolutionary dynamics between predator and prey populations.
  • Analysis of spatial and phenotypic clustering patterns.

Related Experiment Videos

Main Results:

  • Predators and prey self-organize into distinct phenotype clusters (quasi-species).
  • Prey quasi-species form spatial patches.
  • Decreasing prey quasi-species and predator quasi-species distance reduces prey patch size.
  • Spatial and phenotypic clustering inhibits predator evolution.

Conclusions:

  • The interaction between phenotype space patterns (quasi-species) and real space patterns (patches) is a key factor in limiting predator evolution.
  • Spatial structure plays a significant role in shaping coevolutionary dynamics.
  • Quasi-species formation is a critical outcome of this model.