Gutenberg Open Science: Can element chemical impurities in aragonitic shells of marine bivalves serve as proxies for environmental variability?

Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-8476

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DC Field	Value	Language
dc.contributor.author	Schöne, Bernd R.	-
dc.contributor.author	Marali, Soraya	-
dc.contributor.author	Jantschke, Anne	-
dc.contributor.author	Mertz-Kraus, Regina	-
dc.contributor.author	Butler, Paul G.	-
dc.contributor.author	Fröhlich, Lukas	-
dc.date.accessioned	2023-01-03T08:47:59Z	-
dc.date.available	2023-01-03T08:47:59Z	-
dc.date.issued	2023	-
dc.identifier.uri	https://openscience.ub.uni-mainz.de/handle/20.500.12030/8492	-
dc.description.abstract	In many biogenic and geogenic materials, ion impurities can provide serviceable proxies for environmental conditions. However, the element/Ca ratios of bivalve shells are notoriously challenging to interpret. Due to strong vital effects, nonclassical nucleation and growth mechanisms, and/or kinetic processes, the concentration of trace and minor elements in marine shells typically remains below values observed in inorganic CaCO3 precipitated from a solution resembling seawater chemistry but above those expected for thermodynamic equilibrium. The interpretation is further complicated by non-lattice bound and microstructure-specific element content. If environmental conditions were still encoded in the shells, they should result in statistically significantly reproducible element/Ca chronologies between contemporaneous specimens from the same site. Here, we tested this hypothesis and exemplarily studied seven elements in twelve modern specimens of Arctica islandica collected from four different localities in the North Atlantic (Faroe Islands, NE Iceland, Isle of Man, Gulf of Maine). Age-detrended chronologies of weighted annual B, Mg, Sr and Ba/Ca ratios (Al, Zn and Pb largely remained below detection limit) measured in the shells were reproducible between most specimens from the same site, supporting the hypothesis that the incorporation of these elements was at least partly controlled by environmental forcings. Notably, the agreement (explored with linear regression analyses and sign tests) between shell element/Ca ratios and environmental quantities was weaker than the agreement of respective element/Ca ratios between specimens suggesting that the available information on temperature, food and water chemistry did not properly reflect the in-situ conditions to which the bivalves were exposed or other extrinsic factors were at work. As in inorganic aragonite – but in contrast to thermodynamic expectations –, annual Sr/Ca, Mg/Ca and B/Ca ratios were negatively correlated to water temperature (up to 40% explained variability). The link between Ba/Ca and bulk phytoplankton often remained below the significance threshold, but was otherwise positive. Quantitative environmental reconstructions based on ion impurities in bivalve shells will remain challenging or impossible unless the chemistry of the parent solution (= extrapallial fluid) from which the shell actually formed is known, including temporal changes thereof. This information is crucial to compute representative partition coefficients required to calibrate transfer functions.	en_GB
dc.language.iso	eng	de
dc.rights	CC BY-NC-ND	*
dc.rights.uri	https://creativecommons.org/licenses/by-nc-nd/4.0/	*
dc.subject.ddc	540 Chemie	de_DE
dc.subject.ddc	540 Chemistry and allied sciences	en_GB
dc.subject.ddc	550 Geowissenschaften	de_DE
dc.subject.ddc	550 Earth sciences	en_GB
dc.subject.ddc	560 Paläontologie	de_DE
dc.subject.ddc	560 Paleontology	en_GB
dc.subject.ddc	570 Biowissenschaften	de_DE
dc.subject.ddc	570 Life sciences	en_GB
dc.subject.ddc	590 Tiere (Zoologie)	de_DE
dc.subject.ddc	590 Zoological sciences	en_GB
dc.title	Can element chemical impurities in aragonitic shells of marine bivalves serve as proxies for environmental variability?	en_GB
dc.type	Zeitschriftenaufsatz	de
dc.identifier.doi	http://doi.org/10.25358/openscience-8476	-
jgu.type.contenttype	Scientific article	de
jgu.type.dinitype	article	en_GB
jgu.type.version	Published version	de
jgu.type.resource	Text	de
jgu.organisation.department	FB 09 Chemie, Pharmazie u. Geowissensch.	de
jgu.organisation.number	7950	-
jgu.organisation.name	Johannes Gutenberg-Universität Mainz	-
jgu.rights.accessrights	openAccess	-
jgu.journal.title	Chemical geology	de
jgu.journal.volume	616	de
jgu.pages.alternative	121215	de
jgu.publisher.year	2023	-
jgu.publisher.name	Elsevier	de
jgu.publisher.place	New York, NY	de
jgu.publisher.issn	0009-2541	de
jgu.organisation.place	Mainz	-
jgu.subject.ddccode	540	de
jgu.subject.ddccode	550	de
jgu.subject.ddccode	560	de
jgu.subject.ddccode	570	de
jgu.subject.ddccode	590	de
jgu.publisher.doi	10.1016/j.chemgeo.2022.121215	de
jgu.organisation.ror	https://ror.org/023b0x485	-
Appears in collections:	JGU-Publikationen

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