Decoupling between the response of coral calcifying fluid pH and calcification to ocean acidification
Abstract Evaluating the factors responsible for differing species-specific sensitivities to declining seawater pH is central to understanding the mechanisms via which ocean acidification (OA) affects coral calcification. We report here the results of an experiment comparing the responses of the cora...
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ftdoajarticles:oai:doaj.org/article:b8d70a97df5241da98784d056ad77e53 2023-05-15T17:50:28+02:00 Decoupling between the response of coral calcifying fluid pH and calcification to ocean acidification S. Comeau C. E. Cornwall M. T. McCulloch 2017-08-01T00:00:00Z https://doi.org/10.1038/s41598-017-08003-z https://doaj.org/article/b8d70a97df5241da98784d056ad77e53 EN eng Nature Portfolio https://doi.org/10.1038/s41598-017-08003-z https://doaj.org/toc/2045-2322 doi:10.1038/s41598-017-08003-z 2045-2322 https://doaj.org/article/b8d70a97df5241da98784d056ad77e53 Scientific Reports, Vol 7, Iss 1, Pp 1-10 (2017) Medicine R Science Q article 2017 ftdoajarticles https://doi.org/10.1038/s41598-017-08003-z 2022-12-31T05:07:09Z Abstract Evaluating the factors responsible for differing species-specific sensitivities to declining seawater pH is central to understanding the mechanisms via which ocean acidification (OA) affects coral calcification. We report here the results of an experiment comparing the responses of the coral Acropora yongei and Pocillopora damicornis to differing pH levels (8.09, 7.81, and 7.63) over an 8-week period. Calcification of A. youngei was reduced by 35% at pH 7.63, while calcification of P. damicornis was unaffected. The pH in the calcifying fluid (pHcf) was determined using δ11B systematics, and for both species pHcf declined slightly with seawater pH, with the decrease being more pronounced in P. damicornis. The dissolved inorganic carbon concentration at the site of calcification (DICcf) was estimated using geochemical proxies (B/Ca and δ11B) and found to be double that of seawater DIC, and increased in both species as seawater pH decreased. As a consequence, the decline of the saturation state at the site of calcification (Ωcf) with OA was partially moderated by the DICcf increase. These results highlight that while pHcf, DICcf and Ωcf are important in the mineralization process, some corals are able to maintain their calcification rates despite shifts in their calcifying fluid carbonate chemistry. Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Scientific Reports 7 1 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
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Medicine R Science Q |
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Medicine R Science Q S. Comeau C. E. Cornwall M. T. McCulloch Decoupling between the response of coral calcifying fluid pH and calcification to ocean acidification |
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Medicine R Science Q |
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Abstract Evaluating the factors responsible for differing species-specific sensitivities to declining seawater pH is central to understanding the mechanisms via which ocean acidification (OA) affects coral calcification. We report here the results of an experiment comparing the responses of the coral Acropora yongei and Pocillopora damicornis to differing pH levels (8.09, 7.81, and 7.63) over an 8-week period. Calcification of A. youngei was reduced by 35% at pH 7.63, while calcification of P. damicornis was unaffected. The pH in the calcifying fluid (pHcf) was determined using δ11B systematics, and for both species pHcf declined slightly with seawater pH, with the decrease being more pronounced in P. damicornis. The dissolved inorganic carbon concentration at the site of calcification (DICcf) was estimated using geochemical proxies (B/Ca and δ11B) and found to be double that of seawater DIC, and increased in both species as seawater pH decreased. As a consequence, the decline of the saturation state at the site of calcification (Ωcf) with OA was partially moderated by the DICcf increase. These results highlight that while pHcf, DICcf and Ωcf are important in the mineralization process, some corals are able to maintain their calcification rates despite shifts in their calcifying fluid carbonate chemistry. |
format |
Article in Journal/Newspaper |
author |
S. Comeau C. E. Cornwall M. T. McCulloch |
author_facet |
S. Comeau C. E. Cornwall M. T. McCulloch |
author_sort |
S. Comeau |
title |
Decoupling between the response of coral calcifying fluid pH and calcification to ocean acidification |
title_short |
Decoupling between the response of coral calcifying fluid pH and calcification to ocean acidification |
title_full |
Decoupling between the response of coral calcifying fluid pH and calcification to ocean acidification |
title_fullStr |
Decoupling between the response of coral calcifying fluid pH and calcification to ocean acidification |
title_full_unstemmed |
Decoupling between the response of coral calcifying fluid pH and calcification to ocean acidification |
title_sort |
decoupling between the response of coral calcifying fluid ph and calcification to ocean acidification |
publisher |
Nature Portfolio |
publishDate |
2017 |
url |
https://doi.org/10.1038/s41598-017-08003-z https://doaj.org/article/b8d70a97df5241da98784d056ad77e53 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Scientific Reports, Vol 7, Iss 1, Pp 1-10 (2017) |
op_relation |
https://doi.org/10.1038/s41598-017-08003-z https://doaj.org/toc/2045-2322 doi:10.1038/s41598-017-08003-z 2045-2322 https://doaj.org/article/b8d70a97df5241da98784d056ad77e53 |
op_doi |
https://doi.org/10.1038/s41598-017-08003-z |
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Scientific Reports |
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7 |
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1 |
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1766157228435308544 |