Rapid decline in pH of coral calcification fluid due to incorporation of anthropogenic CO2

Abstract Marine calcifying organisms, such as stony corals, are under threat by rapid ocean acidification (OA) arising from the oceanic uptake of anthropogenic CO2. To better understand how organisms and ecosystems will adapt to or be damaged by the resulting environmental changes, field observation...

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Autores principales:	Kaoru Kubota, Yusuke Yokoyama, Tsuyoshi Ishikawa, Atsushi Suzuki, Masao Ishii
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0b7463f124494da78f24d4ccd3572dd4
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spelling	oai:doaj.org-article:0b7463f124494da78f24d4ccd3572dd42021-12-02T15:06:23ZRapid decline in pH of coral calcification fluid due to incorporation of anthropogenic CO210.1038/s41598-017-07680-02045-2322https://doaj.org/article/0b7463f124494da78f24d4ccd3572dd42017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07680-0https://doaj.org/toc/2045-2322Abstract Marine calcifying organisms, such as stony corals, are under threat by rapid ocean acidification (OA) arising from the oceanic uptake of anthropogenic CO2. To better understand how organisms and ecosystems will adapt to or be damaged by the resulting environmental changes, field observations are crucial. Here, we show clear evidence, based on boron isotopic ratio (δ11B) measurements, that OA is affecting the pH of the calcification fluid (pHCF) in Porites corals within the western North Pacific Subtropical Gyre at two separate locations, Chichijima Island (Ogasawara Archipelago) and Kikaijima Island. Corals from each location have displayed a rapid decline in δ11B since 1960. A comparison with the pH of the ambient seawater (pHSW) near these islands, estimated from a large number of shipboard measurements of seawater CO2 chemistry and atmospheric CO2, indicates that pHCF is sensitive to changes in pHSW. This suggests that the calcification fluid of corals will become less supersaturated with respect to aragonite by the middle of this century (pHCF = ~8.3 when pHSW = ~8.0 in 2050), earlier than previously expected, despite the pHCF-upregulating mechanism of corals.Kaoru KubotaYusuke YokoyamaTsuyoshi IshikawaAtsushi SuzukiMasao IshiiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kaoru Kubota Yusuke Yokoyama Tsuyoshi Ishikawa Atsushi Suzuki Masao Ishii Rapid decline in pH of coral calcification fluid due to incorporation of anthropogenic CO2
description	Abstract Marine calcifying organisms, such as stony corals, are under threat by rapid ocean acidification (OA) arising from the oceanic uptake of anthropogenic CO2. To better understand how organisms and ecosystems will adapt to or be damaged by the resulting environmental changes, field observations are crucial. Here, we show clear evidence, based on boron isotopic ratio (δ11B) measurements, that OA is affecting the pH of the calcification fluid (pHCF) in Porites corals within the western North Pacific Subtropical Gyre at two separate locations, Chichijima Island (Ogasawara Archipelago) and Kikaijima Island. Corals from each location have displayed a rapid decline in δ11B since 1960. A comparison with the pH of the ambient seawater (pHSW) near these islands, estimated from a large number of shipboard measurements of seawater CO2 chemistry and atmospheric CO2, indicates that pHCF is sensitive to changes in pHSW. This suggests that the calcification fluid of corals will become less supersaturated with respect to aragonite by the middle of this century (pHCF = ~8.3 when pHSW = ~8.0 in 2050), earlier than previously expected, despite the pHCF-upregulating mechanism of corals.
format	article
author	Kaoru Kubota Yusuke Yokoyama Tsuyoshi Ishikawa Atsushi Suzuki Masao Ishii
author_facet	Kaoru Kubota Yusuke Yokoyama Tsuyoshi Ishikawa Atsushi Suzuki Masao Ishii
author_sort	Kaoru Kubota
title	Rapid decline in pH of coral calcification fluid due to incorporation of anthropogenic CO2
title_short	Rapid decline in pH of coral calcification fluid due to incorporation of anthropogenic CO2
title_full	Rapid decline in pH of coral calcification fluid due to incorporation of anthropogenic CO2
title_fullStr	Rapid decline in pH of coral calcification fluid due to incorporation of anthropogenic CO2
title_full_unstemmed	Rapid decline in pH of coral calcification fluid due to incorporation of anthropogenic CO2
title_sort	rapid decline in ph of coral calcification fluid due to incorporation of anthropogenic co2
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/0b7463f124494da78f24d4ccd3572dd4
work_keys_str_mv	AT kaorukubota rapiddeclineinphofcoralcalcificationfluidduetoincorporationofanthropogenicco2 AT yusukeyokoyama rapiddeclineinphofcoralcalcificationfluidduetoincorporationofanthropogenicco2 AT tsuyoshiishikawa rapiddeclineinphofcoralcalcificationfluidduetoincorporationofanthropogenicco2 AT atsushisuzuki rapiddeclineinphofcoralcalcificationfluidduetoincorporationofanthropogenicco2 AT masaoishii rapiddeclineinphofcoralcalcificationfluidduetoincorporationofanthropogenicco2
_version_	1718388430321221632

Rapid decline in pH of coral calcification fluid due to incorporation of anthropogenic CO2

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