Role of sex and migration in adaptation to sink environments

A - Papers appearing in refereed journals

Lagator, M., Morgan, A., Neve, P. and Colegrave, N. 2014. Role of sex and migration in adaptation to sink environments. Evolution. 68 (8), pp. 2296-2305.

AuthorsLagator, M., Morgan, A., Neve, P. and Colegrave, N.

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.

KeywordsEvolutionary rescue; Experimental evolution; Migration; Sex; Source-sink; Dynamics; Antibiotic-resistance; Population-genetics; Marginal habitats; Evolution; Recombination; Chlamydomonas; Fitness; Ecology; Rates
Year of Publication2014
Journal citation68 (8), pp. 2296-2305
Digital Object Identifier (DOI)
Open accessPublished as bronze (free) open access
FunderLeverhulme Trust
Publisher's version
Supplemental file
Output statusPublished
Publication dates
Online25 Apr 2014
Publication process dates
Accepted14 Apr 2014
Grant IDF/00 215/AW
Copyright licensePublisher copyright

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