Journal
GLOBAL CHANGE BIOLOGY
Volume 26, Issue 12, Pages 6813-6830Publisher
WILEY
DOI: 10.1111/gcb.15372
Keywords
acclimatization; adaptation mechanisms; calcification; corals; environmental variability; natural CO(2)vents; ocean acidification
Funding
- Total Foundation (High-CO2 Seas grant) [BIO-2016-081-4]
- French National Research Agency (4Oceans-MOPGA grant) [ANR-17-MPGA-0001]
- ALMA IDEA (STRAMICRO grant, University of Bologna)
- Maire Curie-Cofund (FP7-PEOPLE-Marie Curie Bandiera-Cofund) [600407]
- Marie Sklodowska-Curie Global Fellowship under the European Union's Horizon 2020 research and innovation programme (H2020-MSCAIF-2015) [702628]
- Marie Curie Actions (MSCA) [702628] Funding Source: Marie Curie Actions (MSCA)
- Agence Nationale de la Recherche (ANR) [ANR-17-MPGA-0001] Funding Source: Agence Nationale de la Recherche (ANR)
Ask authors/readers for more resources
HighpCO(2)habitats and their populations provide an unparalleled opportunity to assess how species may survive under future ocean acidification conditions, and help to reveal the traits that confer tolerance. Here we utilize a unique CO(2)vent system to study the effects of exposure to elevatedpCO2 on trait-shifts observed throughout natural populations ofAstroides calycularis, an azooxanthellate scleractinian coral endemic to the Mediterranean. Unexpected shifts in skeletal and growth patterns were found. Colonies shifted to a skeletal phenotype characterized by encrusting morphology, smaller size, reduced coenosarc tissue, fewer polyps, and less porous and denser skeletons at low pH. Interestingly, while individual polyps calcified more and extended faster at low pH, whole colonies found at low pH site calcified and extended their skeleton at the same rate as did those at ambient pH sites. Transcriptomic data revealed strong genetic differentiation among local populations of this warm water species whose distribution range is currently expanding northward. We found excess differentiation in the CO(2)vent population for genes central to calcification, including genes for calcium management (calmodulin, calcium-binding proteins), pH regulation (V-type proton ATPase), and inorganic carbon regulation (carbonic anhydrase). Combined, our results demonstrate how coral populations can persist in highpCO(2)environments, making this system a powerful candidate for investigating acclimatization and local adaptation of organisms to global environmental change.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available