Stable oxygen isotope composition is biased by shell calcification intensity in planktonic Foraminifera
Planktonic Foraminifera are widely used for environmental reconstructions through measurements of their shell's geochemical characteristics, including its stable oxygen and carbon isotope composition. Using these parameters as unbiased proxies requires a firm knowledge of all potential confound...
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ftunivgeneve:oai:unige.ch:aou:unige:134085 2023-10-01T03:58:00+02:00 Stable oxygen isotope composition is biased by shell calcification intensity in planktonic Foraminifera Weinkauf, Manuel Groeneveld, Jeroen Waniek, Joanna Vennemann, Torsten Martini, Rossana 2020 https://archive-ouverte.unige.ch/unige:134085 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1002/essoar.10502627.1 https://archive-ouverte.unige.ch/unige:134085 unige:134085 info:eu-repo/semantics/openAccess info:eu-repo/classification/ddc/550 Planktonic Foraminifera Calcification Stable oxygen isotope info:eu-repo/semantics/preprint Text Preprint 2020 ftunivgeneve https://doi.org/10.1002/essoar.10502627.1 2023-09-07T07:56:07Z Planktonic Foraminifera are widely used for environmental reconstructions through measurements of their shell's geochemical characteristics, including its stable oxygen and carbon isotope composition. Using these parameters as unbiased proxies requires a firm knowledge of all potential confounding factors influencing foraminiferal shell geochemistry. One such parameter is the shell calcification intensity (shell weight normalized for shell size) that may influence the shell delta 18O value either bioenergetically (by reducing energy available and required for equilibrium isotope fractionation during faster calcification) or kinetically (by influencing calcification depth through the shell's density contrast with seawater). Specimens from the Globigerinoides ruber/elongatus compound from a sediment trap in the North Atlantic have been used to quantify the influence of shell calcification intensity on shell delta 18O values. Shell calcification intensity was found to have a significant effect on the shell stable oxygen isotope composition in all species. Through model fitting, it is suggested that the effect size may be in a range of 1 to 2‰ (depending on species, depth migration, and local oceanographic conditions). We show that the confounding effect of shell calcification intensity on stable oxygen isotope composition can be of importance, depending on the anticipated precision of the derived reconstructions. A framework is provided to quantify this effect in future studies. Report North Atlantic Planktonic foraminifera Université de Genève: Archive ouverte UNIGE |
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Open Polar |
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Université de Genève: Archive ouverte UNIGE |
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ftunivgeneve |
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English |
topic |
info:eu-repo/classification/ddc/550 Planktonic Foraminifera Calcification Stable oxygen isotope |
spellingShingle |
info:eu-repo/classification/ddc/550 Planktonic Foraminifera Calcification Stable oxygen isotope Weinkauf, Manuel Groeneveld, Jeroen Waniek, Joanna Vennemann, Torsten Martini, Rossana Stable oxygen isotope composition is biased by shell calcification intensity in planktonic Foraminifera |
topic_facet |
info:eu-repo/classification/ddc/550 Planktonic Foraminifera Calcification Stable oxygen isotope |
description |
Planktonic Foraminifera are widely used for environmental reconstructions through measurements of their shell's geochemical characteristics, including its stable oxygen and carbon isotope composition. Using these parameters as unbiased proxies requires a firm knowledge of all potential confounding factors influencing foraminiferal shell geochemistry. One such parameter is the shell calcification intensity (shell weight normalized for shell size) that may influence the shell delta 18O value either bioenergetically (by reducing energy available and required for equilibrium isotope fractionation during faster calcification) or kinetically (by influencing calcification depth through the shell's density contrast with seawater). Specimens from the Globigerinoides ruber/elongatus compound from a sediment trap in the North Atlantic have been used to quantify the influence of shell calcification intensity on shell delta 18O values. Shell calcification intensity was found to have a significant effect on the shell stable oxygen isotope composition in all species. Through model fitting, it is suggested that the effect size may be in a range of 1 to 2‰ (depending on species, depth migration, and local oceanographic conditions). We show that the confounding effect of shell calcification intensity on stable oxygen isotope composition can be of importance, depending on the anticipated precision of the derived reconstructions. A framework is provided to quantify this effect in future studies. |
format |
Report |
author |
Weinkauf, Manuel Groeneveld, Jeroen Waniek, Joanna Vennemann, Torsten Martini, Rossana |
author_facet |
Weinkauf, Manuel Groeneveld, Jeroen Waniek, Joanna Vennemann, Torsten Martini, Rossana |
author_sort |
Weinkauf, Manuel |
title |
Stable oxygen isotope composition is biased by shell calcification intensity in planktonic Foraminifera |
title_short |
Stable oxygen isotope composition is biased by shell calcification intensity in planktonic Foraminifera |
title_full |
Stable oxygen isotope composition is biased by shell calcification intensity in planktonic Foraminifera |
title_fullStr |
Stable oxygen isotope composition is biased by shell calcification intensity in planktonic Foraminifera |
title_full_unstemmed |
Stable oxygen isotope composition is biased by shell calcification intensity in planktonic Foraminifera |
title_sort |
stable oxygen isotope composition is biased by shell calcification intensity in planktonic foraminifera |
publishDate |
2020 |
url |
https://archive-ouverte.unige.ch/unige:134085 |
genre |
North Atlantic Planktonic foraminifera |
genre_facet |
North Atlantic Planktonic foraminifera |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/essoar.10502627.1 https://archive-ouverte.unige.ch/unige:134085 unige:134085 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/essoar.10502627.1 |
_version_ |
1778530345822453760 |