Please use this identifier to cite or link to this item:
http://doi.org/10.25358/openscience-6893
Authors: | Brosset, Cornélia Höche, Nils Shirai, Kotaro Mertz-Kraus, Regina Schöne, Bernd R. |
Title: | Strong coupling between biomineral morphology and Sr/Ca of Arctica islandica (Bivalvia) : implications for Shell Sr/Ca-based temperature estimates |
Online publication date: | 20-Apr-2022 |
Year of first publication: | 2022 |
Language: | english |
Abstract: | Bivalve shells serve as powerful high-resolution paleoclimate archives. However, the number of reliable temperature proxies is limited. It has remained particularly difficult to extract temperature signals from shell Sr/Ca, although Sr is routinely employed in other biogenic aragonites. In bivalves, Sr/Ca is linked to the prevailing microstructure and is sometimes affected by kinetics. Here, the hypothesis is tested that temperature can be reconstructed from shell Sr/Ca once microstructure and/or growth-rate-related bias has been mathematically eliminated. Therefore, the relationship between Sr/Ca and increment width, as well as biomineral unit size, has been studied in three different shell portions of field-grown Arctica islandica specimens. Subsequently, microstructure and/or growth-rate-related variation was removed from Sr/Ca data and residuals compared to temperature. As demonstrated, the hypothesis could not be verified. Even after detrending, Sr/Ca remained positively correlated to water temperature, which contradicts thermodynamic expectations and findings from inorganic aragonite. Any temperature signal potentially recorded by shell Sr/Ca is overprinted by other environmental forcings. Unless these variables are identified, it will remain impossible to infer temperature from Sr/Ca. Given the coupling with the biomineral unit size, a detailed characterization of the microstructure should remain an integral part of subsequent attempts to reconstruct temperature from Sr/Ca. |
DDC: | 550 Geowissenschaften 550 Earth sciences 560 Paläontologie 560 Paleontology |
Institution: | Johannes Gutenberg-Universität Mainz |
Department: | FB 09 Chemie, Pharmazie u. Geowissensch. |
Place: | Mainz |
ROR: | https://ror.org/023b0x485 |
DOI: | http://doi.org/10.25358/openscience-6893 |
Version: | Published version |
Publication type: | Zeitschriftenaufsatz |
Document type specification: | Scientific article |
License: | CC BY |
Information on rights of use: | https://creativecommons.org/licenses/by/4.0/ |
Journal: | Minerals 12 5 |
Pages or article number: | 500 |
Publisher: | MPDI |
Publisher place: | Basel |
Issue date: | 2022 |
ISSN: | 2075-163X |
Publisher DOI: | 10.3390/min12050500 |
Appears in collections: | DFG-491381577-G |
Files in This Item:
File | Description | Size | Format | ||
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![]() | strong_coupling_between_biomi-20220419143841067.pdf | paper | 6.03 MB | Adobe PDF | View/Open |
strong_coupling_between_biomi-20220419143930946.zip | supplements | 19.33 MB | ZIP | View/Open |