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Tier 2
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Original research — experimental, observational, or case-control study. Direct primary evidence.
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Single and combined effects of microplastics and cadmium on the sea cucumber Apostichopus japonicus
Marine Environmental Research2023
23 citations
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Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Score: 55
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0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Researchers examined the individual and combined toxic effects of cadmium and microplastics on sea cucumbers. The study found that cadmium was the primary driver of negative effects including reduced growth, digestive enzyme suppression, and disruption of gut microbiota, but the presence of microplastics increased cadmium's toxicity when both pollutants were present at high concentrations.
Microplastic pollution of the ocean has received extensive attention as plastic pollution increases globally, but the potential ecological risks caused by microplastic interactions with trace metals still require further research. In this study, Apostichopus japonicus was used to explore the individual and combined toxicities of cadmium (Cd) and microplastics and their effects on growth, Cd tissue accumulation, digestive enzymes, and gut microbes. The body weight gain and specific growth rate of animals exposed to a combination of high concentrations of Cd and microplastics decreased. The addition of high concentrations of cadmium to the diet led to an increase in cadmium content in the respiratory tree, digestive tract and body wall. Amylase, lipase and trypsin decreased to different degrees in the group treated with high concentrations of Cd/microplastics. Firmicutes were significantly reduced across multiple treatment groups, with the order Lactobacillales being the most significantly affected. Cd is the pollutant causing the greatest negative impact, but the presence of microplastics undoubtedly increases its toxicity.