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Updated: Jan 20, 2026

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Adaptive migration promotes food web persistence.

A Mougi1

  • 1Institute of Agricultural and Life Sciences, Academic Assembly, Shimane University, 1060 Nishikawatsu-cho, Matsue, 690-8504, Japan. amougi@gmail.com.

Scientific Reports
|September 4, 2019
PubMed
Summary

Adaptive movement in ecological models significantly boosts species persistence. Organisms moving to favorable habitats prevent regional extinction, enhancing biodiversity maintenance in complex ecosystems.

Area of Science:

  • Ecology
  • Theoretical Ecology
  • Population Dynamics

Background:

  • Spatiality is crucial for maintaining complex ecological systems with diverse species.
  • Existing models often assume random organism movement, which can be maladaptive.
  • Random dispersal may lead to species migrating from high- to low-fitness areas.

Purpose of the Study:

  • To investigate the role of adaptive movement in meta-community food web models.
  • To determine if adaptive dispersal can enhance species persistence across habitats.
  • To compare the effects of adaptive versus random dispersal on ecological community stability.

Main Methods:

  • Development of a meta-community model incorporating a food web structure.
  • Simulation of organism movement between habitats with varying fitness levels.

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  • Comparison of community persistence under adaptive and random dispersal scenarios.

    • Main Results:

    • Adaptive dispersal significantly improves species persistence across habitats.
    • Species are more likely to persist in systems with adaptive movement, especially in less connected habitats.
    • Adaptive dispersers abandon unfavorable habitats for favorable ones, preventing regional extinction.

    Conclusions:

    • Adaptive movement is a key factor in maintaining large and diverse ecological communities.
    • The stabilizing effect of spatiality in ecological systems may be underestimated by random movement models.
    • Organismal adaptive dispersal enhances overall community resilience and biodiversity.