Gao Yongfei, Wang Ruyue, Li Yanyu, Ding Xuebin, Jiang Yueming, Feng Jianfeng, Zhu Lin
Key Laboratory of Pollution Process and Environmental Criteria of Ministry of Education and Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
Key Laboratory of Pollution Process and Environmental Criteria of Ministry of Education and Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
Sci Total Environ. 2021 Jun 10;772:145064. doi: 10.1016/j.scitotenv.2021.145064. Epub 2021 Feb 4.
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, including 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.
金属在水生食物网中的营养转移已得到充分研究；然而，大多数研究考察的是海洋生物整个身体中的金属残留情况，而非特定组织中的残留。在本研究中，我们测定了2019年7月从中国辽东湾采集的17种不同营养级（TLs）的海洋物种（包括甲壳类动物、腹足类动物、双壳类动物和鱼类）各器官中铜、铬、铅、锌、镉和镍的浓度。结果表明，海洋物种的肝脏、鳃和肌肉组织是分析海洋环境中铜、铬、铅、锌、镉和镍污染的理想指标。当考虑这些海洋物种的整个身体时，在所研究的食物网中观察到铜、铬、铅、锌、镉和镍出现生物稀释现象。相比之下，整个研究食物网中金属组织特异性生物放大呈现出不同的结果。在肝脏和鳃组织中，镉浓度与营养级之间存在负相关，同时在鳃组织中也观察到铜的生物稀释现象。在肌肉组织中，铜、铅和镍呈现生物稀释，且铜、铅和镍的营养放大因子范围为0.44至0.73。本研究强调了考虑组织特异性对于获取关于海洋食物网中金属营养动力学和营养转移的更准确信息的重要性，从而加强对野生动物和人类健康中多种元素的风险评估。
