School of Marine Science and Fisheries, Jiangsu Ocean University, Lianyungang, 222005, China; State Key Laboratory of Mariculture Biobreeding and Sustainable Goods, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China.
State Key Laboratory of Mariculture Biobreeding and Sustainable Goods, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China.
Mar Environ Res. 2024 Jul;199:106598. doi: 10.1016/j.marenvres.2024.106598. Epub 2024 Jun 8.
Marine organisms commonly encounter co-stress resulting from the coexistence of microplastics (MPs) and heavy metals pollution in marine environments. Nevertheless, the combined effects and toxicity mechanisms of MPs and heavy metals on marine organisms remain unclear. This study integrated growth, physiological, morphological, and biochemical markers to assess the individual and combined toxicity of polyvinyl chloride MPs (PVC MPs, 1 × 10 particles/L) and copper (Cu, 200 μg/L) on marine jacopever (Sebastes schlegelii). The results revealed that co-exposure to MPs and Cu had a more detrimental impact on jacopever compared to the single-exposure groups, as evidenced by the enhanced growth inhibition, respiratory stress, and hepatotoxicity. This phenomenon may be attributed to PVC MPs accelerating the accumulation of Cu in jacopever liver. Therefore, peroxidation damage occurred in the co-exposed liver and may result in liver dysfunction. These findings contribute valuable insights into the risks associated with the coexistence of MPs and heavy metal pollution in marine ecosystems.
海洋生物经常面临微塑料（MPs）和重金属污染共存带来的联合胁迫。然而，MPs 和重金属对海洋生物的联合效应和毒性机制仍不清楚。本研究综合了生长、生理、形态和生化标志物，以评估聚氯乙烯 MPs（PVC MPs，1×10 个颗粒/L）和铜（Cu，200μg/L）对海洋拟沙丁鱼（Sebastes schlegelii）的单一和联合毒性。结果表明，与单一暴露组相比，MPs 和 Cu 的共暴露对拟沙丁鱼的影响更为不利，表现为生长抑制、呼吸胁迫和肝毒性增强。这种现象可能归因于 PVC MPs 加速了 Cu 在拟沙丁鱼肝中的积累。因此，共暴露的肝脏发生了过氧化损伤，可能导致肝功能障碍。这些发现为理解海洋生态系统中 MPs 和重金属污染共存带来的风险提供了有价值的信息。
