AI Article Synopsis
- - Plastic waste, especially in the form of polystyrene microparticles, poses a serious threat to freshwater ecosystems, potentially affecting health through the ingestion of these particles by aquatic organisms like daphnids.
- - In the study, carboxy functionalized polystyrene microparticles were found to be more toxic than amine functionalized ones, leading to significant accumulation in the daphnid's gut without affecting other body parts.
- - The exposure to these microparticles caused metabolic disruptions and increased activity in enzymes related to metabolism and detoxification, indicating that plastic pollution can adversely affect the physiology of freshwater species.
Article Abstract
Plastic waste is considered a major threat for terrestrial, marine and freshwater ecosystems. Ingestion of primary or secondary microparticles resulting from plastic degradation can lead to their trophic transfer raising serious health concerns. In this study, the effect of amine and carboxy functionalized polystyrene microparticles on the physiology of daphnids was investigated with a combination of phenotypic and metabolic endpoints. Carboxy functionalized microparticles showed higher toxicity in acute exposures compared to their amine counterparts. Accumulation of both microparticles in animal gut was confirmed by stereo-microscopy as well as fluorescent microscopy which showed no presence of particles in the rest of the animal. Fluorescence based quantification of microparticles extracted from animal lysates validated their concentration-dependent uptake. Additionally, exposure of daphnids to amine and carboxy functionalized microparticles resulted in increased activities of key enzymes related to metabolism and detoxification. Finally, significant metabolic perturbations were discovered following exposure to microplastics. These findings suggest that polystyrene microparticles can hinder organism performance of the freshwater species and highlight the importance of seeking for holistic and physiological endpoints for pollution assessment.
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| http://dx.doi.org/10.1016/j.jhazmat.2023.132023 | DOI Listing |
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