Kim Changhae, Song Jinyoung, Jung Jinho
Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea.
Bull Environ Contam Toxicol. 2023 Mar 16;110(4):66. doi: 10.1007/s00128-023-03705-9.
The maternal effect of microplastics (MPs) toxicity is likely influenced by age and brood of test species. This study investigated the maternal effect of polyethylene MP fragments (18.23 ± 8.02 μm) with benzophenone-3 (BP-3; 2.89 ± 0.20% w/w) on chronic toxicity to Daphnia magna over two generations. Neonate (< 24 h old) and adult (5 d old) daphnids in the F0 generation were exposed until 21 d old, then first and third brood neonates in the F1 generation were recovered in clean M4 medium for 21 d. Higher chronic toxicity and maternal effect of MP/BP-3 fragments were observed in the adult group compared with the neonate group, reducing growth and reproduction in both F0 and F1 generations. First brood neonates in the F1 generation showed a higher maternal effect of MP/BP-3 fragments than third brood ones, resulting in enhanced growth and reproduction relative to the control. This study provided insights into the ecological risk of MPs containing plastic additives in the natural environment.
微塑料（MPs）毒性的母体效应可能受受试物种的年龄和繁殖代数影响。本研究调查了含有二苯甲酮-3（BP-3；2.89 ± 0.20% w/w）的聚乙烯MP碎片（18.23 ± 8.02微米）对大型溞两代的慢性毒性的母体效应。F0代的新生幼体（<24小时龄）和成年个体（5日龄）大型溞暴露至21日龄，然后将F1代的第一和第三窝新生幼体在清洁的M4培养基中培养21天。与新生幼体组相比，成年组中观察到MP/BP-3碎片具有更高的慢性毒性和母体效应，这降低了F0代和F1代的生长和繁殖。F1代的第一窝新生幼体比第三窝表现出更高的MP/BP-3碎片母体效应，相对于对照组，其生长和繁殖增强。本研究为自然环境中含有塑料添加剂的微塑料的生态风险提供了见解。
