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Effects of polystyrene microplastic particles on the morphological and functional parameters of Daphnia magna
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Adverse Effects of Polystyrene Microplastic Exposure on Daphnia magna: a Comprehensive Assessment of Acute Toxicity, Behavioral Changes, and Oxidative Stress
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Comprehensive toxicity testing of polystyrene microplastics on Daphnia magna showed that 1-µm particles were most toxic (48-h LC50: 23.57 mg/L), reducing swimming speed and feeding behavior while triggering oxidative stress markers including elevated malondialdehyde. These behavioral and biochemical endpoints serve as sensitive early-warning biomarkers for ecological risk, highlighting how nanoscale plastics impair the zooplankton that form the base of aquatic food webs.
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.
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