A review of benthic foraminiferal oxygen and carbon isotopes

Babette Hoogakker; Toyoho Ishimura; Lennart de Nooijer; Anthony Rathburn; Gerhard Schmiedl

doi:10.1016/j.quascirev.2024.108896

A review of benthic foraminiferal oxygen and carbon isotopes

Babette Hoogakker^*, Toyoho Ishimura, Lennart de Nooijer, Anthony Rathburn, Gerhard Schmiedl

^*Corresponding author for this work

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Abstract

Stable isotopes in the calcium carbonate of benthic foraminifera provide important paleoenvironmental information about seawater/sedimentary porewaters that these foraminifera live in. Oxygen isotopes provide essential insights about variations in deep water temperatures and sea-level/ice volume changes, while carbon isotopes provide information about sea-water carbon/nutrient cycling. In this review we look into detail at the direct and indirect mechanisms that contribute to stable oxygen and carbon isotope signals in Rotaliid benthic foraminifera. This includes effects from ontogenetic- and calcification mechanisms, and the impact of methane seeps and post-depositional diagenesis. We conclude our review with an overview of current challenges and provide recommendations for future research endeavors aimed at outstanding knowledge gaps in understanding how these biomineralizers control their stable isotopes.

Original language	English
Article number	108896
Journal	Quaternary Science Reviews
Volume	342
Early online date	22 Aug 2024
DOIs	https://doi.org/10.1016/j.quascirev.2024.108896
Publication status	E-pub ahead of print - 22 Aug 2024

ASJC Scopus subject areas

Global and Planetary Change
Ecology, Evolution, Behavior and Systematics
Archaeology
Archaeology
Geology

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abstract = "Stable isotopes in the calcium carbonate of benthic foraminifera provide important paleoenvironmental information about seawater/sedimentary porewaters that these foraminifera live in. Oxygen isotopes provide essential insights about variations in deep water temperatures and sea-level/ice volume changes, while carbon isotopes provide information about sea-water carbon/nutrient cycling. In this review we look into detail at the direct and indirect mechanisms that contribute to stable oxygen and carbon isotope signals in Rotaliid benthic foraminifera. This includes effects from ontogenetic- and calcification mechanisms, and the impact of methane seeps and post-depositional diagenesis. We conclude our review with an overview of current challenges and provide recommendations for future research endeavors aimed at outstanding knowledge gaps in understanding how these biomineralizers control their stable isotopes.",

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A review of benthic foraminiferal oxygen and carbon isotopes

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