Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China.
Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China.
Chemosphere. 2023 Jan;310:136939. doi: 10.1016/j.chemosphere.2022.136939. Epub 2022 Oct 20.
The rising concentration of microplastics and nanoparticles coexisting simultaneously in marine may bring joint harm to zooplankton. Rotifer is an important functional group of marine zooplankton, which plays an important role in the energy flow of marine ecosystem. To evaluate the comprehensive effects of nano-sized microplastics and metal oxide nanoparticles on life history parameters of rotifers and population dynamics of rotifers during eliminating harmful algae Phaeocystis, we exposed rotifers Brachionus plicatilis to the multiple combinations of different concentrations of nanoplastics and ZnO nanoparticles. Results showed that rotifer maturation time was prolonged and the total offspring was decreased significantly with rising ZnO nanoparticles and microplastics concentrations, and microplastics and ZnO nanoparticles had significant interaction, which brought more serious joint deleterious effects on survival, development, and reproduction. At the population level, ZnO nanoparticles exacerbated the delayed effect of microplastics on the elimination of Phaeocystis by rotifers, although eventually rotifers also completely eliminated Phaeocystis in the closed system. This study provided new insights into revealing the comprehensive impact of microplastics and ZnO nanoparticles on zooplankton not only from the perspective of life history parameters of rotifers but also from the perspective of population dynamics of rotifers controlling harmful algae, which is of great significance to understand the impact of mixed pollutants on marine ecosystem.
海洋中同时存在的微塑料和纳米颗粒浓度不断上升，可能会对浮游动物造成联合危害。轮虫是海洋浮游动物的一个重要功能群，在海洋生态系统的能量流动中发挥着重要作用。为了评估纳米级微塑料和金属氧化物纳米颗粒对轮虫生活史参数和消除有害藻类赤潮甲藻时轮虫种群动态的综合影响，我们将褶皱臂尾轮虫暴露于不同浓度的纳米塑料和 ZnO 纳米颗粒的多种组合中。结果表明，随着 ZnO 纳米颗粒和微塑料浓度的升高，轮虫的成熟时间延长，总后代数显著减少，微塑料和 ZnO 纳米颗粒之间存在显著的相互作用，对轮虫的生存、发育和繁殖造成了更严重的联合有害影响。在种群水平上，尽管轮虫最终也在封闭系统中完全消除了赤潮甲藻，但 ZnO 纳米颗粒加剧了微塑料对轮虫消除赤潮甲藻的延迟效应。本研究从轮虫生活史参数和控制有害藻类的轮虫种群动态两个方面为揭示微塑料和 ZnO 纳米颗粒对浮游动物的综合影响提供了新的见解，这对于了解混合污染物对海洋生态系统的影响具有重要意义。
