State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China; Plastic Marine Debris Research Center, East China Normal University, 200062 Shanghai, China; Regional Training and Research Center on Plastic Marine Debris and Microplastics, IOC-UNESCO, Shanghai 200241, China.
The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
J Hazard Mater. 2021 Oct 5;419:126456. doi: 10.1016/j.jhazmat.2021.126456. Epub 2021 Jun 24.
Microplastic (MP) pollution in marine environments and organisms has received substantial international attention. However, long-term field studies of MPs are scarce. Here, we assessed the seasonal variation in MP abundance in the Zhoushan fishing ground (ZFG), one of the most abundant and productive fishing grounds worldwide, and analyzed the long-term MP accumulation in fish gastrointestinal tracts from September 2017 to June 2018. The most common MP particles in the ZFG were polyethylene terephthalate and polypropylene. After four seasons of continuous monitoring, we did not find accumulation of MPs in the fish after 10% KOH digestion. In total, 254 MP particles were removed from the gastrointestinal tracts of all fish. The average number of particles per fish was lower than that reported in previous global marine studies. There were significant differences among species. Moreover, this study provides the calculation of the weight of MPs ingested by fish and an estimate of the load of accumulated MPs in fish. According to the estimation, the load of MPs ingested by fish annually was approximately 3 kg in ZFG. These findings provide the long-term evidence of MP contamination in biota from the ZFG. The amounts of MPs ingested by fish require more detailed and improved investigation and estimation in further studies.
海洋环境和生物中的微塑料（MP）污染受到了国际社会的广泛关注。然而，长期的海洋 MP 实地研究却很少。在这里，我们评估了舟山渔场（ZFG）中 MP 丰度的季节性变化，舟山渔场是世界上最丰富和生产力最高的渔场之一，并分析了 2017 年 9 月至 2018 年 6 月鱼类胃肠道中 MP 的长期积累情况。ZFG 中最常见的 MP 颗粒是聚对苯二甲酸乙二醇酯和聚丙烯。经过四个季节的连续监测，我们发现经过 10% KOH 消化后，鱼类体内并没有 MP 的积累。总共从所有鱼类的胃肠道中去除了 254 个 MP 颗粒。鱼类中每只鱼的颗粒平均数低于以前全球海洋研究报告的数值。不同种间存在显著差异。此外，本研究还计算了鱼类摄入的 MP 重量，并估计了鱼类体内积累的 MP 负荷。根据估计，ZFG 中鱼类每年摄入的 MP 负荷约为 3 公斤。这些发现为 ZFG 生物群中 MP 污染提供了长期证据。鱼类摄入的 MP 量需要在进一步的研究中进行更详细和改进的调查和估计。
