title: Chemical composition of two mineralogically contrasting Arctic bivalves' shells and their relationships to environmental variables.
abstract: The main goal of this study was to determine the concentrations of trace elements in the mineralogically contrasting shells of two Arctic bivalves: Chlamys islandica and Ciliatocardium ciliatum. Aragonite shells seem to be more susceptible to the binding of metal ions, which is most likely a result of their crystal lattice structure. We suggest that less biologically controlled aragonite mineralization tends to incorporate more metal impurities into the crystal lattice in waters with a lower pH, where metal ions are more available. Higher concentrations of impurities may further increase the lattice distortion causing lower crystal lattice stability and higher susceptibility to dissolution. Calcitic shells seem to be less prone to bind metal ions than aragonite shells most likely because under strict biological control, the uptake of ions from ambient seawater is more selective; thus, the final crystal lattice is less contaminated by other metals and is more resistant to dissolution.
authors.affiliation: Marine Ecology Department, Institute of Oceanology, Polish Academy of Sciences, Powstańców Warszawy 55, 81-712 Sopot, Poland. Electronic address: iglikowska@iopan.gda.pl.
authors.forename: A
authors.initials: A
authors.lastname: Iglikowska
authors.affiliation: Marine Chemistry and Biochemistry Department, Institute of Oceanology, Polish Academy of Sciences, Powstańców Warszawy 55, 81-712 Sopot, Poland. Electronic address: hyron@iopan.gda.pl.
authors.forename: J
authors.initials: J
authors.lastname: Bełdowski
authors.affiliation: Marine Ecology Department, Institute of Oceanology, Polish Academy of Sciences, Powstańców Warszawy 55, 81-712 Sopot, Poland. Electronic address: maciej.chelchowski@op.pl.
authors.forename: M
authors.initials: M
authors.lastname: Chełchowski
authors.affiliation: Institute of Marine Research, Sykehusveien 23, 9294 Tromsø, Norway; University Centre in Svalbard, Longyearbyen, Norway. Electronic address: melissa.chierici@imr.no.
authors.forename: M
authors.initials: M
authors.lastname: Chierici
authors.affiliation: Marine Ecology Department, Institute of Oceanology, Polish Academy of Sciences, Powstańców Warszawy 55, 81-712 Sopot, Poland. Electronic address: kedra@iopan.gda.pl.
authors.forename: M
authors.initials: M
authors.lastname: Kędra
authors.affiliation: Marine Ecology Department, Institute of Oceanology, Polish Academy of Sciences, Powstańców Warszawy 55, 81-712 Sopot, Poland. Electronic address: jprzytarska@iopan.gda.pl.
authors.forename: J
authors.initials: J
authors.lastname: Przytarska
authors.affiliation: Marine Ecology Department, Institute of Oceanology, Polish Academy of Sciences, Powstańców Warszawy 55, 81-712 Sopot, Poland. Electronic address: glanna23@wp.pl.
authors.forename: A
authors.initials: A
authors.lastname: Sowa
authors.affiliation: Marine Ecology Department, Institute of Oceanology, Polish Academy of Sciences, Powstańców Warszawy 55, 81-712 Sopot, Poland. Electronic address: kuki@iopan.pl.
authors.forename: P
authors.initials: P
authors.lastname: Kukliński
mesh_terms: D060105:Animal Shells / Q000737:chemistry*; D000818:Animals; D001110:Arctic Regions; D049872:Bivalvia / Q000737:chemistry* / Q000378:metabolism; D002119:Calcium Carbonate / Q000737:chemistry; D004784:Environmental Monitoring; D008670:Metals / Q000378:metabolism; D049897:Pectinidae / Q000378:metabolism; D012623:Seawater / Q000737:chemistry; D014131:Trace Elements / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D008670:Metals; D014131:Trace Elements; D014874:Water Pollutants, Chemical; D002119:Calcium Carbonate
keywords: Arctic; Bivalves; Seawater carbonates; Shell mineralogy; Trace metals