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Updated: Dec 21, 2025

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Dispersal Reduction: Causes, Genomic Mechanisms, and Evolutionary Consequences.

J M Waters1, B C Emerson2, P Arribas2

  • 1Department of Zoology, University of Otago, 340 Great King Street, Dunedin 9016, New Zealand.

Trends in Ecology & Evolution
|May 13, 2020
PubMed
Summary
This summary is machine-generated.

Reductions in dispersal ability drive species diversification across many life forms. Natural selection acting on existing genetic variation causes rapid, sometimes parallel, losses in dispersal, leading to speciation and biodiversity.

Keywords:
dispersalecological selectionevolutionary genomicsflightlessparallel evolutiontransporter hypothesis

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Area of Science:

  • Evolutionary Biology
  • Genomics
  • Ecology

Background:

  • Dispersal reduction is increasingly recognized as a significant factor in evolutionary diversification.
  • Understanding the causes and consequences of reduced dispersal across diverse taxa and ecosystems is crucial.

Purpose of the Study:

  • To synthesize emerging data on dispersal reduction across taxa and ecosystems.
  • To highlight commonalities in the causes and consequences of dispersal reduction.
  • To explore the diverse genomic mechanisms driving these evolutionary shifts.

Main Methods:

  • Literature synthesis of recent biological analyses.
  • Comparative analysis of data across different taxa and ecosystems.
  • Examination of genomic data related to dispersal shifts.

Main Results:

  • Dispersal reduction is a widespread driver of diversification.
  • Natural selection acting on standing genetic variation facilitates rapid, often parallel, loss of dispersal.
  • Dispersal loss is linked to speciation and biodiversity formation.

Conclusions:

  • Dispersal reduction represents a key nexus between adaptive and neutral evolutionary processes.
  • Recognizing these links transforms our understanding of biodiversity formation.
  • Genomic mechanisms play a diverse role in facilitating dispersal loss and subsequent diversification.