Relationships between trace element concentrations and the stable nitrogen isotope ratio in biota from Suruga Bay, Japan

摘要

Relationships between the concentrations of 13 trace elements and δ~(15)N were identified to investigate the trophic-level-dependent accumulation of elements in biota from Suruga Bay, Japan. The results showed biomagnifica-tion for Hg, As and Se (very weak for As and Se), biodi-lution for Cd, Cu, Mn, Ni, Pb, Sb and Zn, and nontrophic relationships for Co, Cs and Mo. It is likely that the bio-magnification of Hg does not differ significantly with the location, whereas some trace elements, such as As, Se and Zn, show a characteristic trophic transfer in each location, depending on the food web structure and environmental factors.