Decrease in volume and density of foraminiferal shells with progressing ocean acidification

Abstract Rapid increases in anthropogenic atmospheric CO2 partial pressure have led to a decrease in the pH of seawater. Calcifying organisms generally respond negatively to ocean acidification. Foraminifera are one of the major carbonate producers in the ocean; however, whether calcification reduct...

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Autores principales:	Azumi Kuroyanagi, Takahiro Irie, Shunichi Kinoshita, Hodaka Kawahata, Atsushi Suzuki, Hiroshi Nishi, Osamu Sasaki, Reishi Takashima, Kazuhiko Fujita
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/322deeb26e05451e918b3af79596677e
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spelling	oai:doaj.org-article:322deeb26e05451e918b3af79596677e2021-12-02T18:37:11ZDecrease in volume and density of foraminiferal shells with progressing ocean acidification10.1038/s41598-021-99427-12045-2322https://doaj.org/article/322deeb26e05451e918b3af79596677e2021-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-99427-1https://doaj.org/toc/2045-2322Abstract Rapid increases in anthropogenic atmospheric CO2 partial pressure have led to a decrease in the pH of seawater. Calcifying organisms generally respond negatively to ocean acidification. Foraminifera are one of the major carbonate producers in the ocean; however, whether calcification reduction by ocean acidification affects either foraminiferal shell volume or density, or both, has yet to be investigated. In this study, we cultured asexually reproducing specimens of Amphisorus kudakajimensis, a dinoflagellate endosymbiont-bearing large benthic foraminifera (LBF), under different pH conditions (pH 7.7–8.3, NBS scale). The results suggest that changes in seawater pH would affect not only the quantity (i.e., shell volume) but also the quality (i.e., shell density) of foraminiferal calcification. We proposed that pH and temperature affect these growth parameters differently because (1) they have differences in the contribution to the calcification process (e.g., Ca2+-ATPase and Ω) and (2) pH mainly affects calcification and temperature mainly affects photosynthesis. Our findings also suggest that, under the IPCC RCP8.5 scenario, both ocean acidification and warming will have a significant impact on reef foraminiferal carbonate production by the end of this century, even in the tropics.Azumi KuroyanagiTakahiro IrieShunichi KinoshitaHodaka KawahataAtsushi SuzukiHiroshi NishiOsamu SasakiReishi TakashimaKazuhiko FujitaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Azumi Kuroyanagi Takahiro Irie Shunichi Kinoshita Hodaka Kawahata Atsushi Suzuki Hiroshi Nishi Osamu Sasaki Reishi Takashima Kazuhiko Fujita Decrease in volume and density of foraminiferal shells with progressing ocean acidification
description	Abstract Rapid increases in anthropogenic atmospheric CO2 partial pressure have led to a decrease in the pH of seawater. Calcifying organisms generally respond negatively to ocean acidification. Foraminifera are one of the major carbonate producers in the ocean; however, whether calcification reduction by ocean acidification affects either foraminiferal shell volume or density, or both, has yet to be investigated. In this study, we cultured asexually reproducing specimens of Amphisorus kudakajimensis, a dinoflagellate endosymbiont-bearing large benthic foraminifera (LBF), under different pH conditions (pH 7.7–8.3, NBS scale). The results suggest that changes in seawater pH would affect not only the quantity (i.e., shell volume) but also the quality (i.e., shell density) of foraminiferal calcification. We proposed that pH and temperature affect these growth parameters differently because (1) they have differences in the contribution to the calcification process (e.g., Ca2+-ATPase and Ω) and (2) pH mainly affects calcification and temperature mainly affects photosynthesis. Our findings also suggest that, under the IPCC RCP8.5 scenario, both ocean acidification and warming will have a significant impact on reef foraminiferal carbonate production by the end of this century, even in the tropics.
format	article
author	Azumi Kuroyanagi Takahiro Irie Shunichi Kinoshita Hodaka Kawahata Atsushi Suzuki Hiroshi Nishi Osamu Sasaki Reishi Takashima Kazuhiko Fujita
author_facet	Azumi Kuroyanagi Takahiro Irie Shunichi Kinoshita Hodaka Kawahata Atsushi Suzuki Hiroshi Nishi Osamu Sasaki Reishi Takashima Kazuhiko Fujita
author_sort	Azumi Kuroyanagi
title	Decrease in volume and density of foraminiferal shells with progressing ocean acidification
title_short	Decrease in volume and density of foraminiferal shells with progressing ocean acidification
title_full	Decrease in volume and density of foraminiferal shells with progressing ocean acidification
title_fullStr	Decrease in volume and density of foraminiferal shells with progressing ocean acidification
title_full_unstemmed	Decrease in volume and density of foraminiferal shells with progressing ocean acidification
title_sort	decrease in volume and density of foraminiferal shells with progressing ocean acidification
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/322deeb26e05451e918b3af79596677e
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_version_	1718377789519822848

Decrease in volume and density of foraminiferal shells with progressing ocean acidification

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