Model for kinetic effects on calcium isotope fractionation (δ44Ca) in inorganic aragonite and cultured planktonic foraminifera

Gussone, Nikolaus; Eisenhauer, Anton; Heuser, Alexander; Dietzel, Martin; Bock, Barbara; Böhm, Florian; Spero, Howard J.; Lea, David W.; Biȷma, Jelle; Nägler, Thomas F.

doi:10.1016/s0016-7037(02)01296-6

Cited by 213 publications

(180 citation statements)

References 36 publications

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“…Gonçalves et al, 1998) and Ca 2+ /phosphate co-transporters (Ambudkar et al, 1984) have been described. Depending on the transporter's structure, ions may pass the membrane either with or without their hydration sphere (Gouaux and MicKinnon, 2005), although (partial) dehydration increases the selectivity greatly (see also Gussone et al, 2003).…”

Section: Ca 2+ Transport In Foraminiferamentioning

confidence: 99%

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Biomineralization in perforate foraminifera

Nooijer

Spero

Erez

et al. 2014

Earth-Science Reviews

210

190

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a b s t r a c t a r t i c l e i n f oIn this paper, we review the current understanding of biomineralization in perforate foraminifera. Ideas on the mechanisms responsible for the flux of Ca 2+ and inorganic carbon from seawater into the test were originally based on light and electron microscopic observations of calcifying foraminifera. From the 1980s onward, tracer experiments, fluorescent microscopy and high-resolution test geochemical analysis have added to existing calcification models. Despite recent insights, no general consensus on the physiological basis of foraminiferal biomineralization exists. Current models include seawater vacuolization, transmembrane ion transport, involvement of organic matrices and/or pH regulation, although the magnitude of these controls remain to be quantified. Disagreement between currently available models may be caused by the use of different foraminiferal species as subject for biomineralization experiments and/or lack of a more systematic approach to study (dis)similarities between taxa. In order to understand foraminiferal controls on element incorporation and isotope fractionation, and thereby improve the value of foraminifera as paleoceanographic proxies, it is necessary to identify key processes in foraminiferal biomineralization and formulate hypotheses regarding the involved physiological pathways to provide directions for future research.

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Section: Ca 2+ Transport In Foraminiferamentioning

confidence: 99%

“…Mg 2+ ) and their fractionation (e.g. Gussone et al, 2003). (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.…”

Section: Ca 2+ Transport In Foraminiferamentioning

confidence: 99%

Biomineralization in perforate foraminifera

Nooijer

Spero

Erez

et al. 2014

Earth-Science Reviews

210

190

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“…Recently, down-core shifts in Ca isotopic abundance have been successfully applied to the reconstruction of Caribbean SST and salinity fluctuations in response to the Pliocene closure of the Central American Gateway (approximately 4.0-4.6 Ma ago) adopting a multi-proxy approach . Gussone et al (2003) developed a thermodynamic model describing the temperature-dependent Ca isotope fractionation behaviour. This model recombines the investigations of the d 44/40 Ca-temperature relationship of inorganically precipitated aragonite and cultured planktonic foraminifera Orbulina universa with the findings of Nägler et al (2000).…”

Section: Introductionmentioning

confidence: 99%

Tropical Atlantic SST history inferred from Ca isotope thermometry over the last 140ka

Hippler

Eisenhauer

Nägler

2006

Geochimica et Cosmochimica Acta

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Exploring the potentials of new methods in palaeothermometry is essential to improve our understanding of past climate change.Here, we present a refinement of the published d 44/40 Ca-temperature calibration investigating modern specimens of planktonic foraminifera Globigerinoides sacculifer and apply this to sea surface temperature (SST) reconstructions over the last two glacial-interglacial cycles. Reproduced measurements of modern G. sacculifer collected from surface waters describe a linear relationship for the investigated temperature range (

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“…Taxonomic effects refer to an isotopic (disequilibrium) and/or elemental composition exerted by a phylum. Investigations regarding vital effects on calcium isotopes in skeletal carbonates have mainly focused on foraminifers, coccoliths, corals and bivalves (e.g., Skulan et al, 1997;Gussone et al, 2003;Immenhauser et al, 2005;Sime et al, 2005;Böhm et al, 2006;Gussone et al, 2007) whereas little is known about vital effects on calcium isotopes in brachiopods.…”

Section: Introductionmentioning

confidence: 99%

“…The calcium isotopic composition of inorganic carbonate precipitates Marriott et al, 2004) and of skeletal carbonates are positively correlated with temperature (e.g., Nägler et al, 2000;Gussone et al, 2003). As opposed to oxygen isotopes, calcium isotopes are more variable throughout abiogenic and biogenic calcite and are characterized by different slopes and offsets.…”

Section: Introductionmentioning

confidence: 99%

Stable isotope profiles (Ca, O, C) through modern brachiopod shells of T. septentrionalis and G. vitreus: Implications for calcium isotope paleo-ocean chemistry

et al. 2010

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Brachiopod shells are widely used as an archive to reconstruct elemental and isotopic composition of seawater. Studies, focused on oxygen and carbon isotopes over the last decades, are increasingly extending to the emerging calcium isotope system. To date, only little attention has been paid to test the reliability of fossil brachiopods on their modern counterparts. In this context, the present study investigates two modern brachiopods, Terebratulina septentrionalis (eastern Canada, 5-30 m depth, 7.1°C seasonal temperature variation, two-layer shell) and Gryphus vitreus (northern Mediterranean, 200 m depth, constant all-year round temperature, three-layer shell). Both species were sampled along the ontogenetic growth direction and calcium, oxygen, and carbon isotopes as well as elemental concentration were measured. Calcium isotopes were analyzed on TIMS. The elemental composition was analyzed by LA-ICP-MS and ICP-AES. The results indicate an intra-specimen δ 44/40 Ca variation ranging from 0.16 to 0.33‰, pointing to a fairly homogenous distribution of calcium isotopes in brachiopod shells. However, in the light of the suggested 0.7‰ increase in calcium isotopes over the Phanerozoic such intra-specimen variations constrain ocean reconstruction. δ 44/40 Ca values of T. septentrionalis do not seem to be affected by growth rate. Calcium isotopic values of G. vitreus are heavy in the central part of the shell and trend towards lighter values in peripheral areas approaching the maximum isotopic composition of T. septentrionalis. The maximum interspecies δ 44/40 Ca difference of 0.62‰ between T. septentrionalis and G. vitreus indicates that care should be taken when using different taxa, species with different strontium content or brachiopods with specialized shell structure, such as G. vitreus, for ocean water reconstruction in terms of Ca isotopic composition. T. septentrionalis may record Ca isotopic fractionation related to seasonal seawater temperature variations in its shell but this is difficult to resolve at the current analytical precision. Average δ 18 O-derived temperatures of the two investigated species are close to on-site measured temperatures.

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Model for kinetic effects on calcium isotope fractionation (δ44Ca) in inorganic aragonite and cultured planktonic foraminifera

Abstract: Abstract-The

Cited by 213 publications

References 36 publications

Biomineralization in perforate foraminifera

Biomineralization in perforate foraminifera

Tropical Atlantic SST history inferred from Ca isotope thermometry over the last 140ka

Stable isotope profiles (Ca, O, C) through modern brachiopod shells of T. septentrionalis and G. vitreus: Implications for calcium isotope paleo-ocean chemistry

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