中国北方渤海湾沿海地区海洋食物网中多溴二苯醚的营养放大作用。

Trophic magnification of polybrominated diphenyl ethers in the marine food web from coastal area of Bohai Bay, North China.

作者信息

Shao Mihua, Tao Ping, Wang Man, Jia Hongliang, Li Yi-Fan

机构信息

College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China.

International Joint Research Centre for Persistent Toxic Substances (IJRC-PTS), College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China.

出版信息

Environ Pollut. 2016 Jun;213:379-385. doi: 10.1016/j.envpol.2016.02.034. Epub 2016 Mar 1.

DOI:10.1016/j.envpol.2016.02.034

PMID:26942685

Abstract

Trophic transfer of polybrominated diphenyl ethers (PBDEs) in aquatic ecosystems is an important criterion for assessing their environmental risk. This study analyzed 13 PBDEs in marine organisms collected from coastal area of Bohai Bay, China. The concentrations of total PBDEs (Σ13PBDEs) ranged from 12 ± 1.1 ng/g wet weight (ww) to 230 ± 54 ng/g ww depending on species. BDE-47 was the predominant compound, with a mean abundance of 20.21 ± 12.97% of total PBDEs. Stable isotopic ratios of carbon (δ(13)C) and nitrogen (δ(15)N) were analyzed to determine the food web structure and trophic level respectively. Trophic magnification factors (TMFs) of PBDEs were assessed as the slope of lipid equivalent concentrations regressed against trophic levels. Significant positive relationships were found for Σ13PBDEs and eight PBDE congeners (BDE-28, BDE-47, BDE-49, BDE-66, BDE-85, BDE-99, BDE-100 and BDE-154). Monte-Carlo simulations showed that the probabilities of TMF >1 were 100% for Σ13PBDEs, BDE-47, BDE-85, BDE-99 and BDE-100, 99% for DE-28, BDE-49, BDE-66 and BDE-154, 94% for BDE-153, and 35% for BDE-17.

摘要

多溴二苯醚（PBDEs）在水生生态系统中的营养转移是评估其环境风险的重要标准。本研究分析了从中国渤海湾沿海地区采集的海洋生物中的13种多溴二苯醚。根据物种不同，总多溴二苯醚（Σ13PBDEs）的浓度范围为12±1.1纳克/克湿重（ww）至230±54纳克/克湿重。BDE-47是主要化合物，平均含量占总多溴二苯醚的20.21±12.97%。分析了碳（δ(13)C）和氮（δ(15)N）的稳定同位素比率，分别以确定食物网结构和营养级。多溴二苯醚的营养放大因子（TMFs）评估为脂质当量浓度与营养级的回归斜率。发现Σ13PBDEs和8种多溴二苯醚同系物（BDE-28、BDE-47、BDE-49、BDE-66、BDE-85、BDE-99、BDE-100和BDE-154）存在显著正相关。蒙特卡洛模拟表明，Σ13PBDEs以及BDE-47、BDE-85、BDE-99和BDE-100的TMF>1的概率为100%，BDE-28、BDE-49、BDE-66和BDE-154为99%，BDE-153为94%，BDE-17为35%。