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Published (Version of record)CC BY V4.0, Open Access
Published (Version of record)CC BY V4.0, Open
Journal article
Local thermal adaptation and limited gene flow constrain future climate responses of a marine ecosystem engineer
Evolutionary Applications (Online) , Vol.13(5), pp.918-934
05/2020
PMID: 32431743
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Source: InCites
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 limited gene flow, while common garden experiments (14‐day exposures to 15, 18, 21°C) revealed strong site differences in early development and mortality in response to elevated temperature. Embryos from many sites spanning a longitudinal thermal gradient showed suppressed development and increased mortality to elevated water temperatures, but populations originating from warmer and more variable thermal environments tended to be less susceptible to warming. Notably, there was significant local‐scale variation in the thermal responses of embryos within regions which was corroborated by the finding of small‐scale genetic differences. We expect the observed genetic and phenotypic differentiation to lead to uneven responses to warming sea surface temperatures in this important marine foundation species. The study highlights the challenges of predicting species responses to thermal stress and the importance of management strategies that incorporate evolutionary potential for “climate‐proofing” marine ecosystems.
Details
- Title
- Local thermal adaptation and limited gene flow constrain future climate responses of a marine ecosystem engineer
- Creators
- Adam D Miller - Deakin UniversityMelinda A Coleman - Southern Cross UniversityJennifer Clark - University of Technology SydneyRachael Cook - Deakin UniversityZuraya Naga - Deakin UniversityMartina A Doblin - University of British ColumbiaAry A Hoffmann - The University of MelbourneCraig D. H Sherman - Deakin UniversityAlecia Bellgrove - Deakin University
- Publication Details
- Evolutionary Applications (Online) , Vol.13(5), pp.918-934
- Publisher
- Wiley-Blackwell Publishing, Inc.; Hoboken
- Grant note
- This work was partially funded by Deakin University funding and Wettenhall Environment Trust awarded to A Miller and A Bellgrove, an Australian Research Council Discovery Grant (DP0663550) awarded to M.A. Coleman, and UTS funding awarded to MA Doblin.
- Identifiers
- 991012925041502368
- Copyright
- This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. © 2019 The Authors. Evolutionary Applications published by John Wiley & Sons Ltd
- Academic Unit
- Faculty of Science and Engineering; School of Environment, Science and Engineering; National Marine Science Centre
- Language
- English
- Resource Type
- Journal article