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Ageing with algal EPS reduces the toxic effects of polystyrene nanoplastics in freshwater microalgae Scenedesmus obliquus
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Combined toxic impact of polystyrene nanoplastics and a flame retardant tetrabromobisphenol A (TBBPA) on freshwater algae Scenedesmus obliquus
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Scientists found that tiny plastic particles (nanoplastics) combined with a common flame retardant chemical (TBBPA) harm freshwater algae more than either pollutant does alone, slowing their growth and damaging their cells. Since algae form the base of aquatic food webs, this matters because these tiny organisms feed everything from small fish to the seafood we eventually eat, meaning pollution "teamwork" in our waterways could have ripple effects up the food chain and, ultimately, onto our plates.
Nanoplastic exposure inhibits growth, photosynthetic pigment synthesis and oxidative enzymes in microalgae: A new threat to primary producers in aquatic environment
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Scientists found that tiny plastic particles (nanoplastics) can seriously harm microalgae, the tiny plants that form the base of the ocean's food chain, by slowing their growth by up to 42%, reducing their ability to photosynthesize, and triggering stress damage inside their cells. Since these algae are eaten by small creatures that are eaten by bigger fish (eventually including the seafood we eat), this damage could ripple up the food chain and disrupt entire aquatic ecosystems. While this study looked at algae rather than humans directly, it adds to growing evidence that nanoplastic pollution, now found
Effects of polystyrene nanoplastics on the physiological and biochemical characteristics of microalga Scenedesmus quadricauda
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Polystyrene nanoplastics were found to disrupt the physiology and biochemistry of freshwater microalgae, affecting photosynthesis, growth rates, and oxidative stress markers at environmentally relevant concentrations. The results highlight nanoplastics as a threat to phytoplankton, the base of freshwater food webs.
The role of algal EPS in reducing the combined toxicity of BPA and polystyrene nanoparticles to the freshwater algae Scenedesmus obliquus
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Researchers studied how polystyrene nanoplastics and the industrial chemical BPA affect freshwater algae when combined, and whether the algae's own protective secretions could reduce the damage. Carboxylated nanoplastics were the most toxic form, and the algae's natural exopolymeric substances helped buffer the combined toxicity. The findings suggest that biological interactions in real waterways may partially mitigate some harmful effects of nanoplastic pollution.
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