NCEAS Project 12389

Converting evolutionary costs into ecological currency: linking trait variation, natural selection, and population dynamics

  • Darren Johnson

ActivityDatesFurther Information
Postdoctoral Fellow1st October 2009—30th September 2012Participant List  

Numerous studies in the ecological and evolutionary literature have estimated the magnitude of natural selection. Although natural selection is widespread and often strong, much less is known about the immediate effects of selection on population dynamics. I propose a method that can be used to quantify the direct effects of trait variation and natural selection on population dynamics. This method will be applied to meta-analyses examining the overall influence of selection on demographic components of fitness in a broad variety of organisms. Information from meta-analyses will be combined with models of population dynamics to evaluate how trait variation and selection can affect key population attributes such as size, growth rate, and probability of extinction. This work will be further applied to develop conceptual models of how different modes of selection (i.e., directional, stabilizing and disruptive) influence concurrent population dynamics. This project has clear ramifications for incorporating evolutionary considerations in the management and conservation of living natural resources.

TypeProducts of NCEAS Research
Journal Article Johnson, Darren; Christie, Mark R.; Moye, Jessica; Hixon, Mark. 2011. Genetic correlations between adults and larvae in a marine fish: Potential effects of fishery selection on population replenishment. Evolutionary Applications. Vol: 4(5). Pages 621-633. (Online version)
Journal Article Johnson, Darren; Grorud-Colvert, Kirsten A.; Rankin, Tauna L.; Sponaugle, Su. 2012. Measuring selective mortality from otoliths and similar structures: a practical guide for describing multivariate selection from cross-sectional data. Marine Ecology Progress Series. Vol: 471. Pages 151-163.