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Comparative toxicity of polystyrene, polypropylene, and polyethylene nanoplastics on Artemia franciscana nauplii: a multidimensional assessment
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Researchers compared the toxic effects of three common plastic types — polystyrene, polypropylene, and polyethylene — in nanoplastic form on brine shrimp larvae. They found that all three types caused harm, but polystyrene nanoplastics were the most toxic across multiple biological measures. The study provides the first direct comparison showing that the chemical composition of nanoplastics significantly influences their toxicity to aquatic organisms.
This study represents the first report comparing the acute toxicity of polystyrene (PS), polypropylene (PP), and polyethylene (PE) nanoplastics on multiple biological endpoints of Artemia franciscana nauplii, a widely used aquatic test organism.
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Impacts of nanoplastics on Artemia franciscana larvae: effects on growth and proteins responses
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This laboratory study found that nanoplastic particles reduced growth and feeding rates in Artemia franciscana (brine shrimp) larvae in a dose-dependent manner. The results demonstrate that nanoplastics — the smallest and potentially most biologically active plastic particles — can harm early-life-stage marine crustaceans at environmentally relevant concentrations.
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Brine shrimp (Artemia franciscana) exposed to polystyrene nanoplastics ingested and bioaccumulated the particles, which also affected their feeding behavior on microalgae and caused changes in gut microbiota. These effects on a widely used aquaculture species raise concerns about nanoplastic contamination in marine food production.
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Researchers conducted long-term toxicity tests of positively and negatively charged polystyrene nanoparticles on marine microalgae and brine shrimp, finding that surface chemistry was the decisive factor: cationic (amino-modified) nanoparticles caused algal growth inhibition and shrimp mortality at microgram-per-liter concentrations, while anionic (carboxylated) particles accumulated and transferred trophically without acute lethality.
Assessing the Biodistribution and Toxicity of Fluorescently Dyed Nano-Polystyrene in Artemia salina Nauplii
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Researchers tracked the distribution and toxic effects of polystyrene nanoplastics in brine shrimp, a key model organism for ecotoxicology. They found that nanoplastics accumulated in the gut and, at higher concentrations, caused gut deformities, with the lethal concentration decreasing by nearly half between 24 and 48 hours of exposure. The findings suggest that nanoplastics may also impair the salt gland, affecting osmoregulation and energy allocation in marine organisms.
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