Metals in Seawater as Recorded by Mussels
Metal concentrations in the soft tissues of bivalves from U.S. coastal waters reveal seawater distributional patterns which repeat themselves year after year. Such a situation may arise from long biological half-lives of the metal or uniform concentrations in the waters over the time period studied or a combination of the two. Not only are anthropogenic inputs of the metals revealed by bivalve metal concentrations but also the occurence of upwelling which brings into surface waters high metal concentrations. Both U-234/U-238 and Am-241/Pu-239+240 ratios have characteristic values for the dissolved and particulate states in seawaters. The values in bivalves can indicate which states are important in biological uptake.
KeywordsWest Coast Byssal Thread Lead Isotopic Ratio Mussel Watch Seawater Concentration
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