Boron isotope systematics of cultured brachiopods: response to acidification, vital effects and implications for palaeo-pH reconstruction
CO2-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 g...
Published in: | Geochimica et Cosmochimica Acta |
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Online Access: | https://epic.awi.de/id/eprint/52293/ https://hdl.handle.net/10013/epic.0eeb9acf-b212-42ce-9c75-31577fa9975b |
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ftawi:oai:epic.awi.de:52293 2024-09-15T18:28:18+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 https://epic.awi.de/id/eprint/52293/ https://hdl.handle.net/10013/epic.0eeb9acf-b212-42ce-9c75-31577fa9975b unknown Elsevier Ltd Jurikova, H. , Liebetrau, V. , Gutjahr, M. , Rollion-Bard, C. , Hu, M. Y. , Krause, S. , Henkel, D. , Hiebenthal, C. , Schmidt, M. , Laudien, J. orcid:0000-0003-2663-4821 and Eisenhauer, A. (2019) Boron isotope systematics of cultured brachiopods: response to acidification, vital effects and implications for palaeo-pH reconstruction , Geochimica et Cosmochimica Acta, 248 , p. 370 . doi:10.1016/j.gca.2019.01.015 <https://doi.org/10.1016/j.gca.2019.01.015> , hdl:10013/epic.0eeb9acf-b212-42ce-9c75-31577fa9975b EPIC3Geochimica et Cosmochimica Acta, Elsevier Ltd, 248, pp. 370, ISSN: 0016-7037 Article isiRev info:eu-repo/semantics/article 2019 ftawi https://doi.org/10.1016/j.gca.2019.01.015 2024-06-24T04:24:41Z CO2-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, Ωcal = 0.6). Using boron isotope (δ11B) 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 δ11B−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 δ11B 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Geochimica et Cosmochimica Acta 248 370 386 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
CO2-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, Ωcal = 0.6). Using boron isotope (δ11B) 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 δ11B−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 δ11B 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 |
spellingShingle |
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 |
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 |
publisher |
Elsevier Ltd |
publishDate |
2019 |
url |
https://epic.awi.de/id/eprint/52293/ https://hdl.handle.net/10013/epic.0eeb9acf-b212-42ce-9c75-31577fa9975b |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
EPIC3Geochimica et Cosmochimica Acta, Elsevier Ltd, 248, pp. 370, ISSN: 0016-7037 |
op_relation |
Jurikova, H. , Liebetrau, V. , Gutjahr, M. , Rollion-Bard, C. , Hu, M. Y. , Krause, S. , Henkel, D. , Hiebenthal, C. , Schmidt, M. , Laudien, J. orcid:0000-0003-2663-4821 and Eisenhauer, A. (2019) Boron isotope systematics of cultured brachiopods: response to acidification, vital effects and implications for palaeo-pH reconstruction , Geochimica et Cosmochimica Acta, 248 , p. 370 . doi:10.1016/j.gca.2019.01.015 <https://doi.org/10.1016/j.gca.2019.01.015> , hdl:10013/epic.0eeb9acf-b212-42ce-9c75-31577fa9975b |
op_doi |
https://doi.org/10.1016/j.gca.2019.01.015 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
248 |
container_start_page |
370 |
op_container_end_page |
386 |
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1810469653783248896 |