Kellock, Celeste, Cole, Catherine, Penkman, Kirsty orcid.org/0000-0002-6226-9799 et al. (6 more authors) (2020) The role of aspartic acid in reducing coral calcification under ocean acidification conditions. Scientific Reports. 12797. ISSN 2045-2322
Abstract
Biomolecules play key roles in regulating the precipitation of CaCO3 biominerals but their response to ocean acidification is poorly understood. We analysed the skeletal intracrystalline amino acids of massive, tropical Porites spp. corals cultured over different seawater pCO2. We find that concentrations of total amino acids, aspartic acid/asparagine (Asx), glutamic acid/glutamine and alanine are positively correlated with seawater pCO2 and inversely correlated with seawater pH. Almost all variance in calcification rates between corals can be explained by changes in the skeletal total amino acid, Asx, serine and alanine concentrations combined with the calcification media pH (a likely indicator of the dissolved inorganic carbon available to support calcification). We show that aspartic acid inhibits aragonite precipitation from seawater in vitro, at the pH, saturation state and approximate aspartic acid concentrations inferred to occur at the coral calcification site. Reducing seawater saturation state and increasing [aspartic acid], as occurs in some corals at high pCO2, both serve to increase the degree of inhibition, indicating that biomolecules may contribute to reduced coral calcification rates under ocean acidification.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) The University of York > Faculty of Sciences (York) > Physics (York) |
Funding Information: | Funder Grant number LEVERHULME TRUST UNSPECIFIED |
Depositing User: | Pure (York) |
Date Deposited: | 18 Jun 2020 11:40 |
Last Modified: | 16 Oct 2024 16:41 |
Published Version: | https://doi.org/10.1038/s41598-020-69556-0 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1038/s41598-020-69556-0 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:162064 |
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