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Article ? AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button. Tier 2 ? Original research — experimental, observational, or case-control study. Direct primary evidence. Environmental Sources Human Health Effects Marine & Wildlife Sign in to save

Tracking Nano- and Microplastics Accumulation and Egestion in a Marine Copepod by Novel Fluorescent AIEgens: Kinetic Modeling of the Rhythm Behavior

Environmental Science & Technology 2023 22 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 55 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Wen‐Xiong Wang Wen‐Xiong Wang Zipei Dong, Zipei Dong, Wen‐Xiong Wang Zipei Dong, Wen‐Xiong Wang Wen‐Xiong Wang Zipei Dong, Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang Wen‐Xiong Wang

Summary

Researchers used advanced fluorescent probes to precisely track how a marine copepod species takes in and expels nano- and microplastic particles of different sizes and surface types. They found that the copepods followed rhythmic feeding and excretion patterns, with smaller nanoplastics accumulating more readily and being expelled more slowly than larger particles. The study provides detailed data on how tiny marine organisms process plastic particles, which is important for understanding how plastics move through ocean food webs.

Polymers
PS
Models
Invertebrate other

Nano- and microplastics (NMPs) are now prevalent in the marine environment. This study quantified the uptake and depuration kinetics of spherical polystyrene NMPs of different particle sizes (200 nm/30 μm) and functional groups (-NH<sub>2</sub>/-COOH) in a temperate calanoid copepod <i>Calanus sinicus</i> (<i>C. sinicus</i>), which exhibited rhythmic feeding patterns in natural environments. Aggregated-induced emission (AIE) fluorescent probes were employed to track and quantify the kinetics of NMPs with excellent photostability and biocompatibility. The results showed that <i>C. sinicus</i> consumed all NMPs types, with preference of NMPs to small size and amino group. Increased diatom concentrations also inhibited the bioaccumulation of NMPs. Influenced by rhythmic behavior, the bioaccumulation of NMPs by <i>C. sinicus</i> was nonstationary during the 6 h uptake phase. After 1-3 h of rapid uptake, the body burden peaked and then slowly declined. During the 3 h depuration phase, <i>C. sinicus</i> rapidly and efficiently removed NMPs with a mean half-life of only 0.23 h. To further quantify the body burden of <i>C. sinicus</i> under the influence of rhythmic feeding behavior, a biokinetic model was established, and the Markov chain Monte Carlo method was used to estimate the parameter distribution. Our results highlighted that copepods exhibited unique rhythmic feeding behavior under environmentally relevant concentrations of NMPs exposure, which may influence the bioaccumulation, trophic transfer, and environmental fate of NMPs.

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