퇴적물 기반 미세플라스틱이 해양 단각류(Monocorophium uenoi)에 미치는 세대 간 생식 독성 = Transgenerational Reproductive Toxicity of Sediment-Associated Microplastics in the Marine Amphipod, Monocorophium uenoi

다국어 초록 (Multilingual Abstract)

This study was conducted to evaluate the effects of sediment-associated microplastics on the reproduc-tion of marine benthic invertebrates. The marine amphipod Monocorophium uenoi was used as a model organism, and the impacts on acute toxicity and fecundity were investigated through a long-term expo-sure experiment in which polyethylene terephthalate (PET) microplastics replaced the natural habitat substrate. While no significant decrease in survival was observed in the 96-hour acute exposure, a 28-day chronic exposure to the first generation (F1) resulted in a reduc-tion of offspring production to approximately 55% of the control group. In the subse-quent chronic exposure of the second generation (F2), offspring production was com-pletely inhibited in groups where either only females or both sexes were exposed. The presence of microplastics within tissues and organs was confirmed via Raman spec-troscopy, supporting the link between the physical presence of microplastics and the observed reproductive toxicity. This study demonstrates that sediment-associated microplastics are more than just inert particles affecting short-term survival; they represent a potential threat capable of causing a complete loss of the reproductive ca-pacity in amphipods across multiple generations.