SEPULCRE, Sophie; TRIBONDEAU, Marion; BASSINOT, Franck; MOJTAHID, Meryem; NARDELLI, Maria-Pia; DESSANDIER, Pierre Antoine; BONNIN, Jérôme

doi:10.3390/jmse12050736

BASSINOT, Franck
Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
Paléocéanographie [PALEOCEAN]

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Article de revue

Ce document a été publié dans

Journal of Marine Science and Engineering. 2024-04-28, vol. 12, n° 5, p. 736

Résumé en anglais

On six different species of benthic foraminifera covering various microhabitats and recovered from the Northern Atlantic Ocean, we tested the potential of the Mg/Ca and Sr/Ca ratios as proxies for paleoceanography. We performed analysis using two instruments (ICP-OES and ICP-MS) and compared results obtained from living and dead specimens. Our results are in good agreement with previous published calibrations for Hoeglundina elegans, Uvigerina mediterranea, U. peregrina, Melonis barleeanum, and Globobulimina spp. However, we observed a strong variability between living and dead specimens, and between both instrumental approaches. We discuss the impact of the cleaning procedure, as well as the natural variability between samples recovered at different depths inside the sediment. No specific trend can be deciphered from our dataset, but we observed that species from the Uvigerina genus presented the lowest external reproducibility and the best agreement between living and dead specimens. We highlight that both species should not be mixed for analysis, since U. mediterranea presents lower values and a reduced range of variability compared to U. peregrina. We explored the temperature and the Δ[CO32−] as potential controls on the variability of both ratios from U. peregrina and showed that neither of these two parameters can be discarded.< Réduire

Mots clés en anglais

benthic foraminifera Bay of Biscay elemental ratio bottom water temperature carbonate concentration

benthic foraminifera

Bay of Biscay

elemental ratio

bottom water temperature

carbonate concentration

URI

https://oskar-bordeaux.fr/handle/20.500.12278/206394

DOI

http://dx.doi.org/10.3390/jmse12050736

Unités de recherche

EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805

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Assessing the Calibration of Benthic Foraminifera Elemental Ratios from the Northeastern Atlantic

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Mots clés en anglais

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Unités de recherche