Calcium isotope fractionation in coccoliths of cultured Calcidiscus leptoporus, Helicosphaera carteri, Syracosphaera pulchra and Umbilicosphaera foliosa
Four species of marine calcifying algae, the coccolithophores Calcidiscus leptoporus, Helicosphaera carteri, Syracosphaera pulchra and Umbilicosphaera foliosa were grown in laboratory cultures under temperatures varying between 14 and 23 °C, and one species, C. leptoporus, under varying [CO32−], ran...
Published in: | Earth and Planetary Science Letters |
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Main Authors: | , , , , |
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Language: | English |
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Elsevier
2007
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Online Access: | https://oceanrep.geomar.de/id/eprint/6688/ https://oceanrep.geomar.de/id/eprint/6688/1/81_Gussone_2007_CalciumIsotopeFractionationInCoccoliths_Artzeit_pubid7618.pdf https://doi.org/10.1016/j.epsl.2007.06.001 |
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ftoceanrep:oai:oceanrep.geomar.de:6688 2023-05-15T18:01:01+02:00 Calcium isotope fractionation in coccoliths of cultured Calcidiscus leptoporus, Helicosphaera carteri, Syracosphaera pulchra and Umbilicosphaera foliosa Gussone, Nikolaus Langer, G. Geisen, M. Steel, B. A. Riebesell, Ulf 2007 text https://oceanrep.geomar.de/id/eprint/6688/ https://oceanrep.geomar.de/id/eprint/6688/1/81_Gussone_2007_CalciumIsotopeFractionationInCoccoliths_Artzeit_pubid7618.pdf https://doi.org/10.1016/j.epsl.2007.06.001 en eng Elsevier https://oceanrep.geomar.de/id/eprint/6688/1/81_Gussone_2007_CalciumIsotopeFractionationInCoccoliths_Artzeit_pubid7618.pdf Gussone, N., Langer, G., Geisen, M., Steel, B. A. and Riebesell, U. (2007) Calcium isotope fractionation in coccoliths of cultured Calcidiscus leptoporus, Helicosphaera carteri, Syracosphaera pulchra and Umbilicosphaera foliosa. Earth and Planetary Science Letters, 260 (3-4). pp. 505-151. DOI 10.1016/j.epsl.2007.06.001 <https://doi.org/10.1016/j.epsl.2007.06.001>. doi:10.1016/j.epsl.2007.06.001 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2007 ftoceanrep https://doi.org/10.1016/j.epsl.2007.06.001 2023-04-07T14:53:24Z Four species of marine calcifying algae, the coccolithophores Calcidiscus leptoporus, Helicosphaera carteri, Syracosphaera pulchra and Umbilicosphaera foliosa were grown in laboratory cultures under temperatures varying between 14 and 23 °C, and one species, C. leptoporus, under varying [CO32−], ranging from 105 to 219 μmol/kg. Calcium isotope compositions of the coccoliths resemble in both absolute fractionation and temperature sensitivity previous calibrations of marine calcifying species e.g. Emiliania huxleyi (coccolithophores) and Orbulina universa (planktonic foraminifera) as well as inorganically precipitated CaCO3, but also reveal small species specific differences. In contrast to inorganically precipitated calcite, but similar to E. huxleyi and O. universa, the carbonate ion concentration of the medium has no statistically significant influence on the Ca isotope fractionation of C. leptoporus coccoliths; however, combined data of E. huxleyi and C. leptoporus indicate that the observed trends might be related to changes of the calcite saturation state of the medium. Since coccoliths constitute a significant portion of the global oceanic CaCO3 export production, the Ca isotope fractionation in these biogenic structures is important for defining the isotopic composition of the Ca sink of the ocean, one of the key parameters for modelling changes to the marine Ca budget over time. For the present ocean our results are in general agreement with the previously postulated and applied mean value of the oceanic Ca sink (Δsed) of about − 1.3‰, but the observed inter- and intra-species differences point to possible changes in Δsed through earth history, due to changing physico-chemical conditions of the ocean and shifts in floral and faunal assemblages. Article in Journal/Newspaper Planktonic foraminifera OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Earth and Planetary Science Letters 260 3-4 505 515 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Four species of marine calcifying algae, the coccolithophores Calcidiscus leptoporus, Helicosphaera carteri, Syracosphaera pulchra and Umbilicosphaera foliosa were grown in laboratory cultures under temperatures varying between 14 and 23 °C, and one species, C. leptoporus, under varying [CO32−], ranging from 105 to 219 μmol/kg. Calcium isotope compositions of the coccoliths resemble in both absolute fractionation and temperature sensitivity previous calibrations of marine calcifying species e.g. Emiliania huxleyi (coccolithophores) and Orbulina universa (planktonic foraminifera) as well as inorganically precipitated CaCO3, but also reveal small species specific differences. In contrast to inorganically precipitated calcite, but similar to E. huxleyi and O. universa, the carbonate ion concentration of the medium has no statistically significant influence on the Ca isotope fractionation of C. leptoporus coccoliths; however, combined data of E. huxleyi and C. leptoporus indicate that the observed trends might be related to changes of the calcite saturation state of the medium. Since coccoliths constitute a significant portion of the global oceanic CaCO3 export production, the Ca isotope fractionation in these biogenic structures is important for defining the isotopic composition of the Ca sink of the ocean, one of the key parameters for modelling changes to the marine Ca budget over time. For the present ocean our results are in general agreement with the previously postulated and applied mean value of the oceanic Ca sink (Δsed) of about − 1.3‰, but the observed inter- and intra-species differences point to possible changes in Δsed through earth history, due to changing physico-chemical conditions of the ocean and shifts in floral and faunal assemblages. |
format |
Article in Journal/Newspaper |
author |
Gussone, Nikolaus Langer, G. Geisen, M. Steel, B. A. Riebesell, Ulf |
spellingShingle |
Gussone, Nikolaus Langer, G. Geisen, M. Steel, B. A. Riebesell, Ulf Calcium isotope fractionation in coccoliths of cultured Calcidiscus leptoporus, Helicosphaera carteri, Syracosphaera pulchra and Umbilicosphaera foliosa |
author_facet |
Gussone, Nikolaus Langer, G. Geisen, M. Steel, B. A. Riebesell, Ulf |
author_sort |
Gussone, Nikolaus |
title |
Calcium isotope fractionation in coccoliths of cultured Calcidiscus leptoporus, Helicosphaera carteri, Syracosphaera pulchra and Umbilicosphaera foliosa |
title_short |
Calcium isotope fractionation in coccoliths of cultured Calcidiscus leptoporus, Helicosphaera carteri, Syracosphaera pulchra and Umbilicosphaera foliosa |
title_full |
Calcium isotope fractionation in coccoliths of cultured Calcidiscus leptoporus, Helicosphaera carteri, Syracosphaera pulchra and Umbilicosphaera foliosa |
title_fullStr |
Calcium isotope fractionation in coccoliths of cultured Calcidiscus leptoporus, Helicosphaera carteri, Syracosphaera pulchra and Umbilicosphaera foliosa |
title_full_unstemmed |
Calcium isotope fractionation in coccoliths of cultured Calcidiscus leptoporus, Helicosphaera carteri, Syracosphaera pulchra and Umbilicosphaera foliosa |
title_sort |
calcium isotope fractionation in coccoliths of cultured calcidiscus leptoporus, helicosphaera carteri, syracosphaera pulchra and umbilicosphaera foliosa |
publisher |
Elsevier |
publishDate |
2007 |
url |
https://oceanrep.geomar.de/id/eprint/6688/ https://oceanrep.geomar.de/id/eprint/6688/1/81_Gussone_2007_CalciumIsotopeFractionationInCoccoliths_Artzeit_pubid7618.pdf https://doi.org/10.1016/j.epsl.2007.06.001 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
https://oceanrep.geomar.de/id/eprint/6688/1/81_Gussone_2007_CalciumIsotopeFractionationInCoccoliths_Artzeit_pubid7618.pdf Gussone, N., Langer, G., Geisen, M., Steel, B. A. and Riebesell, U. (2007) Calcium isotope fractionation in coccoliths of cultured Calcidiscus leptoporus, Helicosphaera carteri, Syracosphaera pulchra and Umbilicosphaera foliosa. Earth and Planetary Science Letters, 260 (3-4). pp. 505-151. DOI 10.1016/j.epsl.2007.06.001 <https://doi.org/10.1016/j.epsl.2007.06.001>. doi:10.1016/j.epsl.2007.06.001 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2007.06.001 |
container_title |
Earth and Planetary Science Letters |
container_volume |
260 |
container_issue |
3-4 |
container_start_page |
505 |
op_container_end_page |
515 |
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1766170334239653888 |