Phenotypic plasticity facilitates initial colonization of a novel environment

Sheng Pei Wang, David M Althoff

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Phenotypic plasticity can allow organisms to respond to environmental changes by producing better matching phenotypes without any genetic change. Because of this, plasticity is predicted to be a major mechanism by which a population can survive the initial stage of colonizing a novel environment. We tested this prediction by challenging wild Drosophila melanogaster with increasingly extreme larval environments and then examining expression of alcohol dehydrogenase (ADH) and its relationship to larval survival in the first generation of encountering a novel environment. We found that most families responded in the adaptive direction of increased ADH activity in higher alcohol environments and families with higher plasticity were also more likely to survive in the highest alcohol environment. Thus, plasticity of ADH activity was positively selected in the most extreme environment and was a key trait influencing fitness. Furthermore, there was significant heritability of ADH plasticity that can allow plasticity to evolve in subsequent generations after initial colonization. The adaptive value of plasticity, however, was only evident in the most extreme environment and had little impact on fitness in less extreme environments. The results provide one of the first direct tests of the adaptive role of phenotypic plasticity in colonizing a novel environment.

Original languageEnglish (US)
JournalEvolution
DOIs
StateAccepted/In press - Jan 1 2019

Fingerprint

phenotypic plasticity
Alcohol Dehydrogenase
colonization
plasticity
alcohol
alcohol dehydrogenase
Alcohols
fitness
Drosophila melanogaster
alcohols
Phenotype
heritability
Extreme Environments
phenotype
environmental change
Population
prediction
organisms

Keywords

  • Adaptation
  • colonization
  • phenotypic plasticity

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Genetics
  • Agricultural and Biological Sciences(all)

Cite this

Phenotypic plasticity facilitates initial colonization of a novel environment. / Wang, Sheng Pei; Althoff, David M.

In: Evolution, 01.01.2019.

Research output: Contribution to journalArticle

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