Hu Jianying, Zhen Huajun, Wan Yi, Gao Junmin, An Wei, An Lihui, Jin Fen, Jin Xiaohui
College of Environmental Science, Peking University, Beijing, 100871, China.
Environ Sci Technol. 2006 May 15;40(10):3142-7. doi: 10.1021/es0514747.
Organotins, especially tributyltin (TBT) and triphenyltin (TPT), are of particular concern due to their ubiquity in the aquatic environment and theirtoxicityto aquatic organisms. This study reports field studies on trophic magnification factors (TMF) of TBT and TPT in a marine food web. TBT, TPT, and their metabolites in plankton, five benthic invertebrate species, and six fish species collected from Bohai Bay, North China were determined, and it was found that the concentrations of TPT in marine fish were unexpectedly higherthan those of TBT. A positive relationship was found between trophic levels and concentrations of TPT, indicating trophic magnification of TPT in this food web. The TMF of TPT was calculated to be 3.70. On the other hand, concentrations of TBT, dibutyltin (DBT) and monobutyltin (MBT) did not exhibit statistically significant trends with trophic levels, and the TMF of TBT was 0.59. Analysis of organotins in the water and surface sediment from Bohai Bay revealed low inputs of TPT to the environment, which indicated that the high concentrations of TPT found in fish from Bohai Bay were due to the food web magnification of TPT.
有机锡化合物，尤其是三丁基锡（TBT）和三苯基锡（TPT），因其在水生环境中的广泛存在及其对水生生物的毒性而备受关注。本研究报告了在一个海洋食物网中对TBT和TPT的营养放大因子（TMF）的实地研究。测定了从中国北方渤海湾采集的浮游生物、五种底栖无脊椎动物物种和六种鱼类物种中的TBT、TPT及其代谢物，结果发现海洋鱼类中TPT的浓度意外高于TBT。研究发现营养级与TPT浓度之间存在正相关关系，表明该食物网中存在TPT的营养放大现象。计算得出TPT的TMF为3.70。另一方面，TBT、二丁基锡（DBT）和单丁基锡（MBT）的浓度与营养级之间未呈现出统计学上的显著趋势，TBT的TMF为0.59。对渤海湾水体和表层沉积物中的有机锡化合物分析表明，TPT向环境中的输入量较低，这表明在渤海湾鱼类中发现的高浓度TPT是由于TPT在食物网中的放大作用。
