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Rates of gene flow in a freshwater snail and the evolution of phenotypic plasticity

Author:
  • Johan Hollander
  • Johan Ahlgren
  • Christer Brönmark
Publishing year: 2017
Language: English
Pages: 764-770
Publication/Series: Biological Journal of the Linnean Society
Volume: 121
Issue: 4
Document type: Journal article
Publisher: Linnean Society of London

Abstract english

The evolution of phenotypic plasticity requires a number of conditions. Selection of plasticity is favoured when the organism experience environmental change, costs are low and cues are reliable about the environmental heterogeneity. However, organisms living in stable environments, not showing constitutive traits but a large amount of plasticity, are predicted to demonstrate high rates of gene flow in order for selection to favour the evolution of phenotypic plasticity, which accordingly should provide weak genetic structures across populations. We used the pulmonate freshwater gastropod Radix balthica, a species with known and considerable shell shape variation due to predator-induced plasticity, and used amplified fragment length polymorphism markers to test if the rate of gene flow can explain the evolution of phenotypic plasticity. Since R. balthica inhabit water bodies with different but consistent predator regimes, we envisaged a large dispersal rate. However, we found a contradictory result with clear population structures, even among adjacent ponds in southern Sweden. We discuss this apparent paradox in contrast to the evolution of ecotype formation, colonization mechanisms that have the potential to reduce gene flow and, in the context of costs of plasticity, we consider new perspectives about relaxed and variable selection that may drive the evolution of phenotypic plasticity.

Keywords

  • Evolutionary Biology
  • Connectivity
  • Gene flow
  • Isolation-by-distance
  • Local adaptation
  • Phenotypic plasticity
  • Population structure
  • Radix balthica

Other

Published
  • Centre for Animal Movement Research
  • ISSN: 0024-4066
Christer Brönmark
E-mail: christer [dot] bronmark [at] biol [dot] lu [dot] se

Head of unit

Division aquatic ecology

+46 46 222 37 02

+46 73 081 55 48

E-C125

Sölvegatan 37, Lund

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Professor

Aquatic Ecology

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Professor

Division aquatic ecology

+46 46 222 37 02

+46 73 081 55 48

E-C125

Sölvegatan 37, Lund

50

Research group

Aquatic Ecology

Projects

Doctoral students and postdocs

PhD students, main supervisor

Jerker Vinterstare

PhD students, assistant supervisor

  • Nan Hu
  • Varpu Pärssinen
  • Yongcui Sha
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