title: Influence of eutrophication on metal bioaccumulation and oral bioavailability in oysters, Crassostrea angulata.
abstract: Oysters (Crassostrea angulata) are often exposed to eutrophication. However, how these exposures influence metal bioaccumulation and oral bioavailability (OBA) in oysters is unknown. After a four month field experimental cultivation, bioaccumulation factors (BAF) of metals (Fe, Cu, As, Cd, and Pb) from seawater to oysters and metal oral bioavailability in oysters by bionic gastrointestinal tract were determined. A positive effect of macronutrient (nitrate N and total P) concentration in seawater on BAF of Cd in oysters was observed, but such an effect was not significant for Fe, Cu, Pb, and As. Only OBA of As was significantly positively correlated to N and P contents. For Fe, OBA was negatively correlated with N. The regular variation of the OBA of Fe and As may be due to the effect of eutrophication on the synthesis of metal granules and heat-stable protein in oysters, respectively.
authors.affiliation: College of Chemistry and Environment and ‡Fujian Province Key Laboratory of Modern Analytical Science and Separation Technology, Minnan Normal University , Zhangzhou 363000, China.
authors.forename: Shun-Xing
authors.initials: SX
authors.lastname: Li
authors.forename: Li-Hui
authors.initials: LH
authors.lastname: Chen
authors.forename: Feng-Ying
authors.initials: FY
authors.lastname: Zheng
authors.forename: Xu-Guang
authors.initials: XG
authors.lastname: Huang
mesh_terms: D000818:Animals; D001682:Biological Availability; D005068:Eutrophication; D008670:Metals / Q000378:metabolism* / Q000493:pharmacokinetics; D010125:Ostreidae / Q000378:metabolism*; D012623:Seawater; D014874:Water Pollutants, Chemical / Q000378:metabolism* / Q000493:pharmacokinetics
chemical_list: D008670:Metals; D014874:Water Pollutants, Chemical