Articles | Volume 20, issue 19
https://doi.org/10.5194/bg-20-4043-2023
https://doi.org/10.5194/bg-20-4043-2023
Research article
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04 Oct 2023
Research article | Highlight paper |  | 04 Oct 2023

Element ∕ Ca ratios in Nodosariida (Foraminifera) and their potential application for paleoenvironmental reconstructions

Laura Pacho, Lennart de Nooijer, and Gert-Jan Reichart

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Cited articles

Allen, K. A. and Hönisch, B.: The planktic foraminiferal B / Ca proxy for seawater carbonate chemistry: A critical evaluation, Earth Planet. Sc. Lett., 345–348, 203–211, https://doi.org/10.1016/j.epsl.2012.06.012, 2012. 
Allen, K. A., Hönisch, B., Eggins, S. M., Haynes, L. L., Rosenthal, Y., and Yu, J.: Trace element proxies for surface ocean conditions: A synthesis of culture calibrations with planktic foraminifera, Geochim. Cosmochim. Ac., 193, 197–221, https://doi.org/10.1016/j.gca.2016.08.015, 2016. 
Anand, P., Elderfield, H., and Conte, M. H.: Calibration of Mg / Ca thermometry in planktonic foraminifera from a sediment trap time series, Paleoceanography, 18, 1050, https://doi.org/10.1029/2002pa000846, 2003.  
Bahr, A., Schönfeld, J., Hoffmann, J., Voigt, S., Aurahs, R., Kucera, M., Flögel, S., Jentzen, A., and Gerdes, A.: Comparison of Ba / Ca and δ18OWATER as freshwater proxies: A multi-species core-top study on planktonic foraminifera from the vicinity of the Orinoco River mouth, Earth Planet. Sc. Lett., 383, 45–57, https://doi.org/10.1016/j.epsl.2013.09.036, 2013. 
Barker, S., Cacho, I., Benway, H., and Tachikawa, K.: Planktonic foraminiferal Mg / Ca as a proxy for past oceanic temperatures: A methodological overview and data compilation for the Last Glacial Maximum, Quaternary Sci. Rev., 24, 821–834, https://doi.org/10.1016/j.quascirev.2004.07.016, 2005. 
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Co-editor-in-chief
This study presents element/Ca data collected on Nodosariata, a particular group of foraminifera. The results of this work can potentially expand the applicability of foraminiferal proxies to the Permian, with important implication for the pale oceanographic and modeling communities.
Short summary
We analyzed Mg / Ca and other El / Ca (Na / Ca, B / Ca, Sr / Ca and Ba / Ca) in Nodosariata. Their calcite chemistry is markedly different to that of the other calcifying orders of foraminifera. We show a relation between the species average Mg / Ca and its sensitivity to changes in temperature. Differences were reflected in both the Mg incorporation and the sensitivities of Mg / Ca to temperature.
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