Journal
ENVIRONMENTAL MONITORING AND ASSESSMENT
Volume 189, Issue 4, Pages -Publisher
SPRINGER
DOI: 10.1007/s10661-017-5901-y
Keywords
Mytilus; Mineralogy; Geochemistry; Monitoring; Shell size; ICP-MS
Categories
Funding
- Polish-Norwegian Research Programme [Pol-Nor/196260/81/2013]
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Mussels have the ability to control biomineral production and chemical composition, producing shells with a range of functions. In addition to biological control, the environment also seems to influence the process of biomineralization; thus, shells can be used as archives of ambient water parameters during the calcium carbonate deposition. Past and present environmental conditions are recorded in the shells in the form of various proxies including Mg/Ca or Sr/Ca ratios. For such proxies to be accurate and robust, the influence of biological effects including the size of studied organism must be examined and eliminated or minimized, so that the environmental signal can be efficiently extracted. This study considers mineralogy and elemental composition of shells representing four size classes of Mytilus trossulus from the Baltic Sea. Obtained results suggest that mineralogy and chemical composition change throughout the shell development due to most likely a combination of environmental and biological factors. The content of aragonite increases with increasing shell size, while the bulk concentrations of Na, Cd, Cu, U, V, Zn and Pb were found to decrease with increasing height of the shells. Therefore, using mussels for environmental monitoring requires analysis of individuals in the same size range.
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