Size-dependent uptake of micro- and nanoplastics in Daphnia magna

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.

Microplastic Transformation and Toxicity Effects on Daphnia magna

Microplastic encapsulation capacity of a cladoceran zooplankton Daphnia magna

Toxicokinetics and Toxicodynamics of Nanoplastics in Daphnia magna are Polymer-Type Dependent

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Scientists tested how four common types of plastic nanoparticles (found in everything from PVC pipes to plastic eyewear) affect a tiny water flea used to study environmental toxicity, and found that not all plastics are equally harmful, polystyrene was the most toxic, while polycarbonate was over 25 times less toxic. This matters because most plastic pollution research has focused narrowly on polystyrene, so this study suggests we may need different safety guidelines for different plastic types rather than treating "nanoplastics" as one uniform threat, a distinction that could eventually matter for understanding how these particles affect human health too.