CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, The Chinese Academy of Sciences, Xi'an 710075, China; State Key Laboratory in Marine Pollution, Department of Chemistry, City University of Hong Kong, Hong Kong SAR, China.
CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, The Chinese Academy of Sciences, Xi'an 710075, China.
Mar Pollut Bull. 2017 Dec 15;125(1-2):334-340. doi: 10.1016/j.marpolbul.2017.09.045. Epub 2017 Sep 28.
This study aims at describing and interpreting concentrations of arsenic (As), mercury (Hg) and vanadium (V) in seven species of fish, three species of shellfish, one species of crab and two species of shrimp from the typical estuary-bay ecosystem. Arsenic, Hg and V differed among species, and the highest As, Hg and V were observed in shellfish. The stable nitrogen (δN) and carbon (δC) isotopes were determined to investigate the trophic interactions between fluctuating environment and aquatic species. Arsenic concentrations in samples were found negatively correlated with δN, implying biodilution effect of As through the food web, while Hg concentrations in samples were positively correlated with δN, indicating their biomagnification effect. The estimated daily intake values of Hg and V in this study were all below the oral reference dose. However, elevated As intakes of some aquatic organisms suggested a potential risk for frequent consumers.
本研究旨在描述和解释七种鱼类、三种贝类、一种蟹类和两种虾类中砷（As）、汞（Hg）和钒（V）的浓度，这些样本均来自典型的河口湾生态系统。砷、汞和钒在物种间存在差异，贝类中的砷、汞和钒含量最高。稳定的氮（δN）和碳（δC）同位素被用来研究波动环境和水生物种之间的营养相互作用。研究发现，样本中的砷浓度与 δN 呈负相关，这表明砷通过食物网发生了生物稀释效应，而样本中的汞浓度与 δN 呈正相关，表明汞发生了生物放大效应。本研究中 Hg 和 V 的估计日摄入量均低于口服参考剂量。然而，一些水生生物摄入的砷含量较高，这表明频繁食用这些生物的人存在潜在风险。
