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
涂淑仪 1谢婧倩 1吴峰 2卞志和 1兰若 1陈楚楚 1林田1
作者信息
- 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
- 折叠
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MeO-BDEs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MeO-BDEs含量与δ13C(即食物来源)呈正相关关系,与δ15N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.
Abstract
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 and δ13C(indicating food sources)was observed,suggesting MeO-BDEs associated with their respective habitats.Additionally,a weak negative correlation between δ15N 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Key words
tuna/methoxylated polybrominated diphenyl ethers/occurrence/influencing factors/sources引用本文复制引用
基金项目
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)
出版年
2024
NETL
NSTL
万方数据