Environmental stress and evolutionary change

Belinda Van Heerwaarden, Vanessa M. Kellermann, Ary A. Hoffmann

Research output: Chapter in Book/Report/Conference proceedingEncyclopaedia / Dictionary EntryOtherpeer-review

Abstract

Periodically, populations will experience stressful conditions. Adaptation to these conditions requires adequate levels of heritable genetic variance. Other factors including genetic interactions, plasticity, nongenetic inheritance and gene flow may also prevent evolutionary responses. Although stressful conditions can lead to a loss of biodiversity following extinction, periods of stress may also lead to rapid evolution and diversification through novel/intense selection pressures and through the release of variability following an increase in mutation and recombination rates and/or the disruption of canalized systems. Over the last century, anthropogenic disturbances have increasingly imposed severe and novel environmental stresses on natural populations. Evolutionary shifts in response to these recent disturbances (including climate change) have already been detected as shifting phenotypes and altered allele frequencies along gradients.

Original languageEnglish
Title of host publicationEncyclopedia of Ecology
PublisherElsevier
Pages197-203
Number of pages7
Volume1
Edition2
ISBN (Electronic)9780444641304
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • Adaptation
  • Canalization
  • Candidate genes
  • Climate change
  • Epistasis
  • Evolvability
  • Gene flow
  • Genetic interactions
  • Habitat fragmentation
  • Heritability
  • Low population size
  • Mutation rates
  • Recombination rates
  • Selection

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