The effect of ocean acidification on tropical coral calcification: Insights from calcification fluid DIC chemistry
Highlights • Calcification fluid pH and [precipitating DIC] are positively correlated in all corals. • [Precipitating DIC] and coral calcification rate are positively correlated in all but one outlier coral. • Corals cultured at high seawater pCO2 usually have low fluid pH and [precipitating DIC]. •...
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ftoceanrep:oai:oceanrep.geomar.de:45155 2023-05-15T17:50:52+02:00 The effect of ocean acidification on tropical coral calcification: Insights from calcification fluid DIC chemistry Allison, Nicola Cole, Catherine Hintz, Chris Hintz, Ken Rae, James Finch, Adrian 2018 text https://oceanrep.geomar.de/id/eprint/45155/ https://oceanrep.geomar.de/id/eprint/45155/1/Allison.pdf https://doi.org/10.1016/j.chemgeo.2018.09.004 en eng Elsevier https://oceanrep.geomar.de/id/eprint/45155/1/Allison.pdf Allison, N. , Cole, C., Hintz, C., Hintz, K., Rae, J. and Finch, A. (2018) The effect of ocean acidification on tropical coral calcification: Insights from calcification fluid DIC chemistry. Chemical Geology, 497 . pp. 162-169. DOI 10.1016/j.chemgeo.2018.09.004 <https://doi.org/10.1016/j.chemgeo.2018.09.004>. doi:10.1016/j.chemgeo.2018.09.004 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2018 ftoceanrep https://doi.org/10.1016/j.chemgeo.2018.09.004 2023-04-07T15:42:54Z Highlights • Calcification fluid pH and [precipitating DIC] are positively correlated in all corals. • [Precipitating DIC] and coral calcification rate are positively correlated in all but one outlier coral. • Corals cultured at high seawater pCO2 usually have low fluid pH and [precipitating DIC]. • Maintaining high [precipitating DIC] at high seawater pCO2 is at the expense of other calcification processes. Abstract Ocean acidification typically reduces calcification in tropical marine corals but the mechanism for this process is not understood. We use skeletal boron geochemistry (B/Ca and δ11B) to reconstruct the calcification fluid DIC of corals cultured over both high and low seawater pCO2 (180, 400 and 750 μatm). We observe strong positive correlations between calcification fluid pH and concentrations of the DIC species potentially implicated in aragonite precipitation (be they CO32−, HCO3− or HCO3− + CO32−). Similarly, with the exception of one outlier, the fluid concentrations of precipitating DIC species are strongly positively correlated with coral calcification rate. Corals cultured at high seawater pCO2 usually have low calcification fluid pH and low concentrations of precipitating DIC, suggesting that a reduction in DIC substrate at the calcification site is responsible for decreased calcification. The outlier coral maintained high pHCF and DICCF at high seawater pCO2 but exhibited a reduced calcification rate indicating that the coral has a limited energy budget to support proton extrusion from the calcification fluid and meet other calcification demands. We find no evidence that increasing seawater pCO2 enhances diffusion of CO2 into the calcification site. Instead the overlying [CO2] available to diffuse into the calcification site appears broadly comparable between seawater pCO2 treatments, implying that metabolic activity (respiration and photosynthesis) generates a similar [CO2] in the vicinity of the calcification site regardless of seawater pCO2. Article in Journal/Newspaper Ocean acidification OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Chemical Geology 497 162 169 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Highlights • Calcification fluid pH and [precipitating DIC] are positively correlated in all corals. • [Precipitating DIC] and coral calcification rate are positively correlated in all but one outlier coral. • Corals cultured at high seawater pCO2 usually have low fluid pH and [precipitating DIC]. • Maintaining high [precipitating DIC] at high seawater pCO2 is at the expense of other calcification processes. Abstract Ocean acidification typically reduces calcification in tropical marine corals but the mechanism for this process is not understood. We use skeletal boron geochemistry (B/Ca and δ11B) to reconstruct the calcification fluid DIC of corals cultured over both high and low seawater pCO2 (180, 400 and 750 μatm). We observe strong positive correlations between calcification fluid pH and concentrations of the DIC species potentially implicated in aragonite precipitation (be they CO32−, HCO3− or HCO3− + CO32−). Similarly, with the exception of one outlier, the fluid concentrations of precipitating DIC species are strongly positively correlated with coral calcification rate. Corals cultured at high seawater pCO2 usually have low calcification fluid pH and low concentrations of precipitating DIC, suggesting that a reduction in DIC substrate at the calcification site is responsible for decreased calcification. The outlier coral maintained high pHCF and DICCF at high seawater pCO2 but exhibited a reduced calcification rate indicating that the coral has a limited energy budget to support proton extrusion from the calcification fluid and meet other calcification demands. We find no evidence that increasing seawater pCO2 enhances diffusion of CO2 into the calcification site. Instead the overlying [CO2] available to diffuse into the calcification site appears broadly comparable between seawater pCO2 treatments, implying that metabolic activity (respiration and photosynthesis) generates a similar [CO2] in the vicinity of the calcification site regardless of seawater pCO2. |
format |
Article in Journal/Newspaper |
author |
Allison, Nicola Cole, Catherine Hintz, Chris Hintz, Ken Rae, James Finch, Adrian |
spellingShingle |
Allison, Nicola Cole, Catherine Hintz, Chris Hintz, Ken Rae, James Finch, Adrian The effect of ocean acidification on tropical coral calcification: Insights from calcification fluid DIC chemistry |
author_facet |
Allison, Nicola Cole, Catherine Hintz, Chris Hintz, Ken Rae, James Finch, Adrian |
author_sort |
Allison, Nicola |
title |
The effect of ocean acidification on tropical coral calcification: Insights from calcification fluid DIC chemistry |
title_short |
The effect of ocean acidification on tropical coral calcification: Insights from calcification fluid DIC chemistry |
title_full |
The effect of ocean acidification on tropical coral calcification: Insights from calcification fluid DIC chemistry |
title_fullStr |
The effect of ocean acidification on tropical coral calcification: Insights from calcification fluid DIC chemistry |
title_full_unstemmed |
The effect of ocean acidification on tropical coral calcification: Insights from calcification fluid DIC chemistry |
title_sort |
effect of ocean acidification on tropical coral calcification: insights from calcification fluid dic chemistry |
publisher |
Elsevier |
publishDate |
2018 |
url |
https://oceanrep.geomar.de/id/eprint/45155/ https://oceanrep.geomar.de/id/eprint/45155/1/Allison.pdf https://doi.org/10.1016/j.chemgeo.2018.09.004 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://oceanrep.geomar.de/id/eprint/45155/1/Allison.pdf Allison, N. , Cole, C., Hintz, C., Hintz, K., Rae, J. and Finch, A. (2018) The effect of ocean acidification on tropical coral calcification: Insights from calcification fluid DIC chemistry. Chemical Geology, 497 . pp. 162-169. DOI 10.1016/j.chemgeo.2018.09.004 <https://doi.org/10.1016/j.chemgeo.2018.09.004>. doi:10.1016/j.chemgeo.2018.09.004 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.chemgeo.2018.09.004 |
container_title |
Chemical Geology |
container_volume |
497 |
container_start_page |
162 |
op_container_end_page |
169 |
_version_ |
1766157788471361536 |