Research Center of Hydrobiology, Department of Ecology, Jinan University, Guangzhou, 510632, China.
Research Center of Hydrobiology, Department of Ecology, Jinan University, Guangzhou, 510632, China; Research Center of Tropical and Subtropical Aquatic Ecological Engineering, Ministry of Education Engineering, Jinan University, Guangzhou, 510632, China.
Environ Pollut. 2019 Apr;247:999-1008. doi: 10.1016/j.envpol.2019.01.113. Epub 2019 Jan 31.
Endocrine disrupting compounds (EDCs) are becoming an increasing concern regarding bioaccumulation in aquatic biota. However, the effects of regional pollution levels and specific feeding habits on the bioaccumulation of EDCs in fish are rarely reported. 4-Nonylphenol (4-NP), bisphenol A (BPA), 4-tert-octylphenol (4-t-OP), triclocarban (TCC) and triclosan (TCS) were determined in abiotic compartments [water, sediment, suspended particulate matter (SPM)] and fish with different feeding habits along the Pearl River, China. EDCs in abiotic compartments exhibited significant (p < 0.05) spatial variations, forming five zones clustered based on site-specific EDC concentrations. 4-NP was the dominant compound, contributing 58-98% of the EDCs in fish, followed by BPA (<41%), 4-t-OP (<13%), and TCC and TCS (<4.7%). The concentrations of 4-NP and 4-t-OP, BPA, and TCC and TCS were the highest in brackish carnivorous, planktivorous, and detritivorous fish, respectively. The bioaccumulation factors (BAFs) showed that 4-NP accumulated (BAF > 5000) in all fish except for suck-feeding detritivores, while 4-t-OP and TCC accumulated in filter-feeding planktivores. The concentration of 4-NP in carnivores was significantly higher than that in detritivores, indicating the potential biomagnification of 4-NP along food chains. EDCs in sediment and SPM and those in water were most positively correlated with those in detritivores and planktivores, respectively, suggesting the potential of fish with these two feeding habits to act as bioindicators of EDC pollutants.
内分泌干扰化合物（EDCs）在水生生物中的生物蓄积问题越来越受到关注。然而，区域性污染水平和特定摄食习性对鱼类中 EDC 生物蓄积的影响却鲜有报道。本研究在珠江流域采集了不同摄食习性的鱼类以及水、沉积物和悬浮颗粒物（SPM）等非生物介质，测定了其中的 4-壬基酚（4-NP）、双酚 A（BPA）、4-叔辛基酚（4-t-OP）、三氯卡班（TCC）和三氯生（TCS）。结果表明，非生物介质中的 EDC 具有显著的空间差异（p<0.05），根据特定地点的 EDC 浓度可分为 5 个区。4-NP 是最主要的化合物，占鱼类 EDC 总量的 58-98%，其次是 BPA（<41%）、4-t-OP（<13%）和 TCC 和 TCS（<4.7%）。在半咸水肉食性、浮游生物食性和碎屑食性鱼类中，4-NP 和 4-t-OP、BPA 和 TCC 和 TCS 的浓度最高。生物蓄积因子（BAFs）表明，除了吸吮式碎屑食性鱼类外，所有鱼类均能蓄积 4-NP（BAF>5000），而滤食性浮游生物食性鱼类则能蓄积 4-t-OP 和 TCC。肉食性鱼类中 4-NP 的浓度明显高于碎屑食性鱼类，表明 4-NP 可能沿着食物链发生生物放大。沉积物和 SPM 中的 4-NP 和 TCC 以及水中的 4-NP 和 4-t-OP 与碎屑食性和浮游生物食性鱼类中的相应物质浓度最正相关，表明这两种摄食习性的鱼类可能作为 EDC 污染物的生物指示剂。
