Local thermal adaptation and limited gene flow constrain future climate responses of a marine ecosystem engineer.

ABSTRACT: Rising ocean temperatures and extreme temperature events have precipitated declines and local extinctions in many marine species globally, but patterns of loss are often uneven across species ranges for reasons that are poorly understood. Knowledge of the extent of local adaptation and gene flow may explain such patterns and help predict future trajectories under scenarios of climate change. We test the extent to which local differentiation in thermal tolerance is influenced by gene flow and local adaptation using a widely distributed intertidal seaweed (Hormosira banksii) from temperate Australia. Population surveys across ~2,000 km of the species range revealed strong genetic structuring at regional and local scales (global F _ST = 0.243) reflecting extremely limi

SUBMITTER: Miller AD 

PROVIDER: S-EPMC7232764 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature