College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, China.
College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.
Ecotoxicol Environ Saf. 2021 Apr 15;213:112074. doi: 10.1016/j.ecoenv.2021.112074. Epub 2021 Feb 22.
Synthetic musks (SMs) have drawn worldwide attention, as they are persistent, bioaccumulative, and toxic to many organisms. There is not enough information on the bioaccumulation and trophodynamic behavior of SMs in freshwater food webs to reliably understand the associated ecological risks. In this study, the concentrations of six SM congeners in fifteen aquatic species from Lake Chaohu, China, was investigated. The total concentrations of the six SMs ranged from 0.29 to 59.7 ng/g dry weight (median, 4.41) in fish muscle tissue and in the whole body tissues of small fish species and shrimps. Galaxolide (HHCB) and tonalide (AHTN) were the predominant congeners, accounting for 65.0% and 28.5% of the total SM concentration, respectively. On the whole, the total concentrations of SMs in livers and gills were 0.18-32.8 and 0.84-254 times higher than those in muscle tissues in fish species, respectively. In the food web of Lake Chaohu, cashmeran (DPMI) and HHCB showed a trend towards trophic magnification, and AHTN tended to show trophic dilution, but these trends were not statistically significant. This suggested that the trophic transfer of these chemicals through the food web was strongly influenced by many factors, including tissue-specific distribution within individuals at higher trophic levels. More investigation into the trophic transfer of SMs in aquatic ecosystems and the factors influencing uptake is needed.
合成麝香（SMs）具有持久性、生物累积性和对许多生物有毒性，因此引起了全球关注。关于 SMs 在淡水食物网中的生物累积和营养动态行为的信息还不够充分，无法可靠地了解相关的生态风险。本研究调查了来自中国巢湖的 15 种水生物种中六种 SM 同系物的浓度。六种 SMs 的总浓度范围为 0.29-59.7ng/g 干重（中位数为 4.41），存在于鱼类肌肉组织和小鱼及虾类的整个身体组织中。佳乐麝香（HHCB）和檀香麝香（AHTN）是主要的同系物，分别占总 SM 浓度的 65.0%和 28.5%。总的来说，鱼类肝脏和鳃组织中 SMs 的总浓度分别比肌肉组织高 0.18-32.8 倍和 0.84-254 倍。在巢湖的食物网中，龙涎麝香（DPMI）和 HHCB 表现出向营养级放大的趋势，AHTN 则趋于营养级稀释，但这些趋势在统计学上并不显著。这表明这些化学物质通过食物网的营养转移受到许多因素的强烈影响，包括个体中较高营养级别的组织特异性分布。需要进一步研究 SMs 在水生生态系统中的营养转移以及影响吸收的因素。
