Boron isotope systematics of cultured brachiopods:Response to acidification, vital effects and implications for palaeo-pH reconstruction
CO 2 -induced ocean acidification and associated decrease of seawater carbonate saturation state contributed to multiple environmental crises in Earth's history, and currently poses a major threat for marine calcifying organisms. Owing to their high abundance and good preservation in the Phaner...
Published in: | Geochimica et Cosmochimica Acta |
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Main Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2019
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Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/boron-isotope-systematics-of-cultured-brachiopods(d980e0ce-dd47-4a2d-8fcb-3178d054eb6b).html https://doi.org/10.1016/j.gca.2019.01.015 https://research-repository.st-andrews.ac.uk/bitstream/10023/20243/1/Jurikova_2019_GCA_Boron_CC.pdf |
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/d980e0ce-dd47-4a2d-8fcb-3178d054eb6b 2024-09-15T18:28:25+00:00 Boron isotope systematics of cultured brachiopods:Response to acidification, vital effects and implications for palaeo-pH reconstruction Jurikova, Hana Liebetrau, Volker Gutjahr, Marcus Rollion-Bard, Claire Hu, Marian Y. Krause, Stefan Henkel, Daniela Hiebenthal, Claas Schmidt, Mark Laudien, Jürgen Eisenhauer, Anton 2019-03-01 application/pdf https://research-portal.st-andrews.ac.uk/en/researchoutput/boron-isotope-systematics-of-cultured-brachiopods(d980e0ce-dd47-4a2d-8fcb-3178d054eb6b).html https://doi.org/10.1016/j.gca.2019.01.015 https://research-repository.st-andrews.ac.uk/bitstream/10023/20243/1/Jurikova_2019_GCA_Boron_CC.pdf eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/boron-isotope-systematics-of-cultured-brachiopods(d980e0ce-dd47-4a2d-8fcb-3178d054eb6b).html info:eu-repo/semantics/openAccess Jurikova , H , Liebetrau , V , Gutjahr , M , Rollion-Bard , C , Hu , M Y , Krause , S , Henkel , D , Hiebenthal , C , Schmidt , M , Laudien , J & Eisenhauer , A 2019 , ' Boron isotope systematics of cultured brachiopods : Response to acidification, vital effects and implications for palaeo-pH reconstruction ' , Geochimica et Cosmochimica Acta , vol. 248 , pp. 370-386 . https://doi.org/10.1016/j.gca.2019.01.015 Biomineralisation Boron isotopic composition Culturing experiment Low-magnesium calcite pH and pCO reconstruction Physiological response Proxy calibration article 2019 ftunstandrewcris https://doi.org/10.1016/j.gca.2019.01.015 2024-08-14T23:40:02Z CO 2 -induced ocean acidification and associated decrease of seawater carbonate saturation state contributed to multiple environmental crises in Earth's history, and currently poses a major threat for marine calcifying organisms. Owing to their high abundance and good preservation in the Phanerozoic geological record, brachiopods present an advantageous taxon of marine calcifiers for palaeo-proxy applications as well as studies on biological mechanism to cope with environmental change. To investigate the geochemical and physiological responses of brachiopods to prolonged low-pH conditions we cultured Magellania venosa, Terebratella dorsata and Pajaudina atlantica under controlled experimental settings over a period of more than two years. Our experiments demonstrate that brachiopods form their calcite shells under strong biological control, which enables them to survive and grow under low-pH conditions and even in seawater strongly undersaturated with respect to calcite (pH = 7.35, Ω cal = 0.6). Using boron isotope (δ 11 B) systematics including MC-ICP-MS as well as SIMS analyses, validated against in vivo microelectrode measurements, we show that this resilience is achieved by strict regulation of the calcifying fluid pH between the epithelial mantle and the shell. We provide a culture-based δ 11 B−pH calibration, which as a result of the internal pH regulatory mechanisms deviates from the inorganic borate ion to pH relationship, but confirms a clear yet subtle pH dependency for brachiopods. At a micro-scale level, the incorporation of boron appears to be principally driven by a physiological gradient across the shell, where the δ 11 B values of the innermost calcite record the internal calcifying fluid pH while the composition of the outermost layers is also influenced by seawater pH. These findings are of consequence to studies on biomineralisation processes, physiological adaptations as well as past climate reconstructions. Article in Journal/Newspaper Ocean acidification University of St Andrews: Research Portal Geochimica et Cosmochimica Acta 248 370 386 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Biomineralisation Boron isotopic composition Culturing experiment Low-magnesium calcite pH and pCO reconstruction Physiological response Proxy calibration |
spellingShingle |
Biomineralisation Boron isotopic composition Culturing experiment Low-magnesium calcite pH and pCO reconstruction Physiological response Proxy calibration Jurikova, Hana Liebetrau, Volker Gutjahr, Marcus Rollion-Bard, Claire Hu, Marian Y. Krause, Stefan Henkel, Daniela Hiebenthal, Claas Schmidt, Mark Laudien, Jürgen Eisenhauer, Anton Boron isotope systematics of cultured brachiopods:Response to acidification, vital effects and implications for palaeo-pH reconstruction |
topic_facet |
Biomineralisation Boron isotopic composition Culturing experiment Low-magnesium calcite pH and pCO reconstruction Physiological response Proxy calibration |
description |
CO 2 -induced ocean acidification and associated decrease of seawater carbonate saturation state contributed to multiple environmental crises in Earth's history, and currently poses a major threat for marine calcifying organisms. Owing to their high abundance and good preservation in the Phanerozoic geological record, brachiopods present an advantageous taxon of marine calcifiers for palaeo-proxy applications as well as studies on biological mechanism to cope with environmental change. To investigate the geochemical and physiological responses of brachiopods to prolonged low-pH conditions we cultured Magellania venosa, Terebratella dorsata and Pajaudina atlantica under controlled experimental settings over a period of more than two years. Our experiments demonstrate that brachiopods form their calcite shells under strong biological control, which enables them to survive and grow under low-pH conditions and even in seawater strongly undersaturated with respect to calcite (pH = 7.35, Ω cal = 0.6). Using boron isotope (δ 11 B) systematics including MC-ICP-MS as well as SIMS analyses, validated against in vivo microelectrode measurements, we show that this resilience is achieved by strict regulation of the calcifying fluid pH between the epithelial mantle and the shell. We provide a culture-based δ 11 B−pH calibration, which as a result of the internal pH regulatory mechanisms deviates from the inorganic borate ion to pH relationship, but confirms a clear yet subtle pH dependency for brachiopods. At a micro-scale level, the incorporation of boron appears to be principally driven by a physiological gradient across the shell, where the δ 11 B values of the innermost calcite record the internal calcifying fluid pH while the composition of the outermost layers is also influenced by seawater pH. These findings are of consequence to studies on biomineralisation processes, physiological adaptations as well as past climate reconstructions. |
format |
Article in Journal/Newspaper |
author |
Jurikova, Hana Liebetrau, Volker Gutjahr, Marcus Rollion-Bard, Claire Hu, Marian Y. Krause, Stefan Henkel, Daniela Hiebenthal, Claas Schmidt, Mark Laudien, Jürgen Eisenhauer, Anton |
author_facet |
Jurikova, Hana Liebetrau, Volker Gutjahr, Marcus Rollion-Bard, Claire Hu, Marian Y. Krause, Stefan Henkel, Daniela Hiebenthal, Claas Schmidt, Mark Laudien, Jürgen Eisenhauer, Anton |
author_sort |
Jurikova, Hana |
title |
Boron isotope systematics of cultured brachiopods:Response to acidification, vital effects and implications for palaeo-pH reconstruction |
title_short |
Boron isotope systematics of cultured brachiopods:Response to acidification, vital effects and implications for palaeo-pH reconstruction |
title_full |
Boron isotope systematics of cultured brachiopods:Response to acidification, vital effects and implications for palaeo-pH reconstruction |
title_fullStr |
Boron isotope systematics of cultured brachiopods:Response to acidification, vital effects and implications for palaeo-pH reconstruction |
title_full_unstemmed |
Boron isotope systematics of cultured brachiopods:Response to acidification, vital effects and implications for palaeo-pH reconstruction |
title_sort |
boron isotope systematics of cultured brachiopods:response to acidification, vital effects and implications for palaeo-ph reconstruction |
publishDate |
2019 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/boron-isotope-systematics-of-cultured-brachiopods(d980e0ce-dd47-4a2d-8fcb-3178d054eb6b).html https://doi.org/10.1016/j.gca.2019.01.015 https://research-repository.st-andrews.ac.uk/bitstream/10023/20243/1/Jurikova_2019_GCA_Boron_CC.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Jurikova , H , Liebetrau , V , Gutjahr , M , Rollion-Bard , C , Hu , M Y , Krause , S , Henkel , D , Hiebenthal , C , Schmidt , M , Laudien , J & Eisenhauer , A 2019 , ' Boron isotope systematics of cultured brachiopods : Response to acidification, vital effects and implications for palaeo-pH reconstruction ' , Geochimica et Cosmochimica Acta , vol. 248 , pp. 370-386 . https://doi.org/10.1016/j.gca.2019.01.015 |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/boron-isotope-systematics-of-cultured-brachiopods(d980e0ce-dd47-4a2d-8fcb-3178d054eb6b).html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.gca.2019.01.015 |
container_title |
Geochimica et Cosmochimica Acta |
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248 |
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370 |
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