Role of sex and migration in adaptation to sink environments Journal Article

Author(s): Lagator, Mato; Morgan, Andrew D; Neve, Paul B; Colegrave, Nick
Article Title: Role of sex and migration in adaptation to sink environments
Affiliation IST Austria
Abstract: Understanding the effects of sex and migration on adaptation to novel environments remains a key problem in evolutionary biology. Using a single-cell alga Chlamydomonas reinhardtii, we investigated how sex and migration affected rates of evolutionary rescue in a sink environment, and subsequent changes in fitness following evolutionary rescue. We show that sex and migration affect both the rate of evolutionary rescue and subsequent adaptation. However, their combined effects change as the populations adapt to a sink habitat. Both sex and migration independently increased rates of evolutionary rescue, but the effect of sex on subsequent fitness improvements, following initial rescue, changed with migration, as sex was beneficial in the absence of migration but constraining adaptation when combined with migration. These results suggest that sex and migration are beneficial during the initial stages of adaptation, but can become detrimental as the population adapts to its environment.
Keywords: migration; Experimental Evolution; Evolutionary rescue; Sex; Source-sink dynamics
Journal Title: Evolution
Volume: 68
Issue 8
ISSN: 1558-5646
Publisher: Wiley-Blackwell  
Date Published: 2014-01-01
Start Page: 2296
End Page: 2305
Sponsor: The authors are grateful to the Leverhulme Trust (F/00 215/AW) for funding this work.
DOI: 10.1111/evo.12440
Notes: We would like to thank T. Vogwill and J. Lynch for helpful discussions about the concept and experimental design, and C. Evered for technical assistance. B. and D. Charlesworth provided valuable insights into the theory underpinning this work.
Open access: no
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