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Autoren: Brosset, Cornélia
Höche, Nils
Witbaard, Rob
Nishida, Kozue
Shirai, Kotaro
Mertz-Kraus, Regina
Schöne, Bernd R.
Titel: Sr/Ca in shells of laboratory-grown bivalves (Arctica islandica) serves as a proxy for water temperature : implications for (paleo)environmental research?
Online-Publikationsdatum: 7-Nov-2023
Erscheinungsdatum: 2023
Sprache des Dokuments: Englisch
Zusammenfassung/Abstract: Seawater temperature is an essential quantity for paleoclimatological and paleoecological studies. A potential archive that can provide century-long, temporally well-constrained and high-resolution temperature proxy data is available in the form of bivalve shells. However, the number of well-accepted and robust temperature proxies contained in shells is limited to stable oxygen isotopes and carbonate clumped isotopes. Many studies have therefore investigated the possibility to reconstruct temperature from element/Ca properties, specifically Sr/Ca ratios in case of aragonitic shells. As demonstrated here, in agreement with thermodynamic expectations and the lattice strain model, shell Sr/Ca of laboratory-grown Arctica islandica specimens is strongly positively coupled to water temperature. If ultrastructure-related bias is mathematically eliminated, up to 75% of the variability in shell Sr/Ca data can be explained by water temperature. However, in field-grown specimens, this relationship is superimposed by other environmental variables that can hardly be quantified and mathematically eliminated. The explained variability of Sr/Ca is reduced to merely 26% and the prediction uncertainty too large for reliable temperature estimates. Most likely, the equable, less biased conditions in the laboratory resulted in the production of a more uniform shell ultrastructure (with larger and more elongated biomineral units) which in turn was associated with less variable Sr/Ca values and a stronger link to water temperature. Without a detailed understanding and quantification of the factors controlling ultrastructural variations in field-grown bivalves, it remains impossible to employ shell Sr/Ca of wild A. islandica specimens for precise temperature estimates, merely a qualitative temperature reconstruction seems feasible.
DDC-Sachgruppe: 540 Chemie
540 Chemistry and allied sciences
550 Geowissenschaften
550 Earth sciences
560 Paläontologie
560 Paleontology
570 Biowissenschaften
570 Life sciences
590 Tiere (Zoologie)
590 Zoological sciences
Veröffentlichende Institution: Johannes Gutenberg-Universität Mainz
Organisationseinheit: FB 09 Chemie, Pharmazie u. Geowissensch.
Veröffentlichungsort: Mainz
Version: Published version
Publikationstyp: Zeitschriftenaufsatz
Weitere Angaben zur Dokumentart: Scientific article
Nutzungsrechte: CC BY
Informationen zu den Nutzungsrechten:
Zeitschrift: Frontiers in Marine Science
Seitenzahl oder Artikelnummer: 1279164
Verlag: Frontiers Media
Verlagsort: Lausanne
Erscheinungsdatum: 2023
ISSN: 2296-7745
DOI der Originalveröffentlichung: 10.3389/fmars.2023.1279164
Enthalten in den Sammlungen:DFG-491381577-G

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