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Trace elements and stable isotopes (delta13C and delta15N) in shallow and deep-water organisms from the East China Sea |
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| Authors: | Asante Kwadwo Ansong Agusa Tetsuro Mochizuki Hiroko Ramu Karri Inoue Suguru Kubodera Tsunemi Takahashi Shin Subramanian Annamalai Tanabe Shinsuke |
| Institution: | a Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama, Ehime 790-8577, Japan b CSIR Water Research Institute, P. O. Box AH 38, Achimota, Accra, Ghana c Department of Legal Medicine, Faculty of Medicine, Shimane University, Enya 89-1, Izumo 693-8501, Japan d Department of Zoology, The National Science Museum, 3-23-1 Hyakunincho, Shinjuku, Tokyo 169-0073, Japan |
| Abstract: | Trace elements (22) and stable isotope ratios (δ15N and δ13C) were analyzed in marine organisms from shallow (SW) and deep-water (DW) of the East China Sea to understand biomagnification and prey source of trace elements. In the benthic marine organisms from DW, δ15N values were negatively correlated with Ba, Cu, Ag, Mo, Sr, As, and Co concentrations. This may be due to the specific accumulation in lower trophic animals and/or the biodilution through the food web in DW. Relationships between δ15N and concentrations of Co, Cr, Bi, and Tl in fish and Ag, Bi, V, Hg, and Tl in crustaceans showed positive correlations, suggesting that trophic position was affecting the concentrations of those elements in phyla, with higher trophic animals retaining higher concentrations than the lower trophic animals. Positive correlations between δ13C and Rb were observed in marine organisms. Therefore, Rb may be a possible substitute of δ13C as tracer of prey source in the East China Sea although further investigation is required. |
| Keywords: | Trace elements Stable isotopes Marine organisms East China Sea |
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