Geographical gradients in selection can reveal genetic constraints for evolutionary responses to ocean acidification.

ABSTRACT: 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 populatio

SUBMITTER: Gaitan-Espitia JD 

PROVIDER: S-EPMC5326508 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature