Supplementary material from "Geographical gradients in selection can reveal genetic constraints for evolutionary responses to ocean acidification"
Posted on 2017-01-20 - 11:47
Geographical gradients in selection can shape different genetic architectures in natural populations, reflecting potential genetic constraints for adaptive evolution under climate change. Investigation of natural pH/pCO2 variation in upwelling regions reveals different spatio-temporal patterns of natural selection, generating genetic and phenotypic clines in populations, and potentially leading to local adaptation, relevant to understanding effects of ocean acidification (OA). Strong directional selection, associated with intense and continuous upwellings, may have depleted genetic variation in populations within these upwelling regions, favouring increased tolerances to low pH but with an associated cost in other traits. In contrast, diversifying or weak directional selection in populations with seasonal upwellings or outside major upwelling regions may have resulted in higher genetic variances and the lack of genetic correlations among traits. Testing this hypothesis in geographical regions with similar environmental conditions to those predicted under climate change will build insights into how selection may act in the future and how populations may respond to stressors such as OA.
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Diego Gaitán-Espitia, Juan; Marshall, Dustin; Dupont, Sam; Bacigalupe, Leonardo; Bodrossy, Levente; J. Hobday, Alistair (2017). Supplementary material from "Geographical gradients in selection can reveal genetic constraints for evolutionary responses to ocean acidification". The Royal Society. Collection. https://doi.org/10.6084/m9.figshare.c.3670189.v1