Accumulation Kinetics of Polystyrene Nano- and Microplastics in the Waterflea Daphnia Magnaand Trophic Transfer to the Mysid Limnomysis Benedeni

Chronic and Acute Water-Soluble Microplastics Uptake and Effects on Growth and Reproduction of Daphnia magna

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Researchers found that two water-soluble microplastics — polyvinyl alcohol and polymethacrylic acid — harm the water flea Daphnia magna, reducing lifespan, reproduction, and causing physical deformities, raising concerns about these less-studied plastic types that dissolve in water rather than forming visible particles.

Accumulation kinetics of polystyrene nano- and microplastics in the waterflea Daphnia magna and trophic transfer to the mysid Limnomysis benedeni

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Researchers investigated the accumulation kinetics of polystyrene particles ranging from 26 nm to 4800 nm in Daphnia magna and their subsequent transfer to the mysid Limnomysis benedeni. Smaller particles accumulated more efficiently in Daphnia, and trophic transfer to mysids was demonstrated, confirming that nano- and microplastics move through aquatic food chains with size-dependent efficiency.

Microplastic Transformation and Toxicity Effects on Daphnia magna

Microplastic encapsulation capacity of a cladoceran zooplankton Daphnia magna

Are Daphnia similis Playing a Significant Role in Microplastic Biofragmentation?

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Researchers exposing the freshwater microcrustacean Daphnia similis to polystyrene microspheres found that the organisms reduced particle size by nearly 33% over six days through biofragmentation, demonstrating that zooplankton ingestion is an underappreciated pathway for breaking down microplastics into smaller particles.