金枪鱼体内甲氧基多溴二苯醚类化合物的特征和来源  

Characteristics and origins of methoxypolybrominated diphenyl ethers in tuna

作　　者：涂淑仪 谢婧倩 吴峰[2] 卞志和 兰若 陈楚楚 林田 TU Shuyi;XIE Jingqian;WU Feng;BIAN Zhihe;LAN Ruo;CHEN Chuchu;LIN Tian(College of Oceanography and Ecological Sciences,Shanghai Ocean University,Shanghai 201306,China;College of Marine Living Resource Sciences and Management,Shanghai Ocean University,Shanghai 201306,China)

机构地区：[1]上海海洋大学海洋科学与生态环境学院,上海201306 [2]上海海洋大学海洋生物资源与管理学院,上海201306

出　　处：《海洋环境科学》2024年第4期591-600,共10页Marine Environmental Science

基　　金：国家自然科学基金项目(41806126);环境地球化学国家重点实验室开放课题(SKLEG2022218)。

摘　　要：金枪鱼广泛分布于全球海域,处于海洋食物链顶端,具有很强的污染物富集能力,因此常被视为海洋污染的重要指示生物。甲氧基多溴二苯醚(methoxypolybrominated diphenyl ethers,MeO-BDEs)类化合物属于多溴二苯醚衍生物,因其生物富集性和毒性而备受关注。本研究采集了全球大洋(太平洋、大西洋和印度洋)129个金枪鱼样本,旨在弄清其肝脏中MeO-BDEs类化合物的存在情况、特征分布、影响因素以及潜在来源。研究结果显示,金枪鱼体内存在两类MeO-BDEs,分别为2’-MeO-BDE-68和6-MeO-BDE-47,均为天然产生。进一步的单因素和多因素相关性分析揭示,金枪鱼体内MeOBDEs含量与其生存海域相关,且各海域间MeO-BDEs来源存在差异。此外,还发现金枪鱼体内MeOBDEs含量与δ^(13)C(即食物来源)呈正相关关系,与δ^(15)N和体长呈弱负相关关系。这些发现表明,在更高营养级和更大的金枪鱼体内,MeO-BDEs可能发生了生物转化。本研究结果有助于深入了解全球金枪鱼体内MeO-BDEs类污染物的分布特征,并为揭示其来源提供了重要线索和参考依据。Tuna,top predators in the marine food chain,are widely distributed in global oceans.It possess a strong capability for pollutant accumulation.Thus,tuna is commonly used as a vital bioindicator of marine pollution.In this study,129 tuna samples were collected from the Pacific,Atlantic,and Indian Oceans.MeO-BDEs were measured in their livers,in order to investigate the occurrence,distribution patterns,influencing factors,and potential sources.The results revealed two categories of MeO-BDEs were frequently detected in the samples,specifically 2'-MeO-BDE-68 and 6-MeO-BDE-47,which could be of natural origin.Further single-factor and multi-factor correlation analysis revealed a correlation between MeO-BDEs concentration in tuna and its habitat,with differences in sources among various habitats.A positive correlation between concentrations andδ^(13)C(indicating food sources)was observed,suggesting MeO-BDEs associated with their respective habitats.Additionally,a weak negative correlation betweenδ^(15)N and body length was due to the potential conversion of MeO-BDEs within larger tuna organisms at higher trophic levels.The results are helpful to understand the distribution characteristics of MeO-BDEs in tuna worldwide and the potential sources of these pollutants.

关 键 词：金枪鱼 甲氧基多溴二苯醚 赋存特征 影响因素 来源 

分 类 号：X171.5[环境科学与工程—环境科学] X55