Trophic transfer of heavy metals in the marine food web based on tissue residuals
Trophic transfer of heavy metals in the marine food web based on tissue residuals
复制标题
基于组织残留的海洋食物网中重金属的营养转移
DOI：
10.1016/j.scitotenv.2021.145064
复制
发表时间：
2021-02-11
影响因子：
9.8
通讯作者：
Zhu, Lin
中科院分区：
文献类型：
--
作者：
Gao, Yongfei;Wang, Ruyue;Zhu, Lin
在水生食物网中，金属的营养转移已经得到了很好的研究;然而，大多数研究都检查了海洋生物整个身体中金属残留的存在，而不是特定组织中的金属残留。在这项研究中，我们测定了铜，铬的浓度。2019年7月，从中国辽东湾采集了17种不同营养级（TL）的海洋物种（包括甲壳类、腹足类、双壳类和鱼类）的各个器官中的铅、锌、镉和镍。结果表明，海洋生物的肝脏、鳃和肌肉组织是分析海洋环境中Cu、Cr、Pb、Zn、Cd和Ni污染的理想指示物。当这些海洋物种的整个机构被认为是，在研究的食物网中观察到的生物稀释的铜，铬，铅，锌，镉和镍。相比之下，整个研究食物网中的金属组织特异性生物放大显示出不同的结果。在肝脏和鳃组织中，镉和TLs的浓度之间呈负相关，而铜在鳃组织中也观察到生物稀释。在肌肉组织中，铜，铅，镍表现出生物稀释和营养放大系数的铜，铅，镍范围从0.44到0.73。这项研究强调了特定组织考虑的重要性，以获得关于海洋食物网中金属营养动力学和营养转移的进一步准确信息，从而加强对野生动物和人类健康中许多元素的风险评估。(C)2021爱思唯尔有限公司版权所有。
Trophic transfer of metals has been well researched in aquatic food webs; however, most studies have examined the presence of metal residuals in the entire body of marine organisms and but not in specific tissues. In this study, we determined the concentrations of Cu, Cr. Pb, Zn, Cd, and Ni in various organs of 17 marine species, induding crustaceans, gastropods, bivalves, and fishes, with different trophic levels (TLs), which were collected from the Liaodong Bay, China, in July 2019. Results showed that the liver, gill, and muscle tissues of marine species are ideal indicators for analyzing Cu, Cr, Pb, Zn, Cd, and Ni contamination in marine environments. When the entire bodies of these marine species were considered, a bio-dilution in Cu, Cr, Pb, Zn, Cd, and Ni was observed in the studied food web. In contrast, the metal tissue-specific bio-magnification in the entire studied food web showed different results. In the liver and gill tissues, negative correlations were found between the concentrations of cadmium and TLs, while copper bio-dilution was also observed in gill tissue. In the muscle tissues, Cu, Pb, and Ni showed bio-dilution and trophic magnification factors of Cu, Pb, and Ni ranged from 0.44 to 0.73. This study highlights the importance of tissue-specific considerations to obtain further accurate information on metal trophodynamics and trophic transfers in marine food webs, thereby enhancing the risk assessment of many elements in wildlife and human health. (C) 2021 Elsevier B.V. All rights reserved.