This study investigated the quantitative sources of persistent organic pollutants (POPs), their biomagnification factors, and their effect on POP biomagnification in a typical waterbird (common kingfisher, Alcedo atthis) food web in South China. The median concentrations of polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) in kingfishers were 32,500 ng/g lw and 130 ng/g lw, respectively. The congener profiles of PBDEs and PCBs showed significant temporal changes because of the restriction time points and biomagnification potential of different contaminants. The concentrations of most bioaccumulative POPs, such as CBs 138 and 180 and BDEs 153 and 154, decreased at lower rates than those of other POPs. Pelagic fish (metzia lineata) and benthic fish (common carp) were the primary prey of kingfishers, as indicated by quantitative fatty acid signature analysis (QFASA) results. Pelagic and benthic prey species were the primary sources of low and high hydrophobic contaminants for kingfishers, respectively. Biomagnification factors (BMFs) and trophic magnification factors (TMFs) had parabolic relationships with log K_OW, with peak values of approximately 7. Significant negative correlations were found between the whole-body elimination rates of POPs in waterbirds and the log-transformed TMFs and BMFs, indicating that the strong metabolism of waterbirds could potentially affect POP biomagnification.

本研究调查了持久性有机污染物（POPs）的定量来源、其生物放大因子及其对典型水鸟（普通翠鸟、翠鸟）POPs生物放大的影响。）华南地区的食物网。翠鸟体内多氯联苯 (PCB) 和多溴二苯醚 (PBDE) 的中位浓度分别为 32,500 纳克/克活体重和 130 纳克/克活体重。由于不同污染物的限制时间点和生物放大潜力，PBDE 和 PCB 的同源物谱显示出显着的时间变化。大多数生物累积性持久性有机污染物（例如CB 138 和180 以及BDE 153 和154）的浓度下降速度低于其他持久性有机污染物。定量脂肪酸特征分析（QFASA）结果表明，中上层鱼类（metzia lineata）和底栖鱼类（鲤鱼）是翠鸟的主要猎物。中上层和底栖猎物物种分别是翠鸟低疏水性和高疏水性污染物的主要来源。K _OW，峰值约为7。水鸟体内POPs的全身消除率与对数转换的TMF和BMF之间存在显着负相关，表明水鸟的旺盛新陈代谢可能会影响POPs的生物放大作用。