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Microplastics in Gills of Freshwater Fish in a Neotropical Hydrographic Basin
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Evaluation of Microplastic Pollution in Gills of Freshwater Fish in a Neotropical Hydrographic Basin, Brazil
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Analysis of gill tissue from 98 freshwater fish across eight species in Brazil's Sorocaba River basin found microplastics in every individual, with fibers comprising 74% of the 385 particles detected and highest contamination in the most disturbed river. The universal gill contamination across species demonstrates that freshwater fish in human-impacted watersheds serve as a direct route for microplastic entry into aquatic food webs and ultimately human diets.
Microplastics in Freshwater Ecosystems
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Researchers reviewed the evidence for microplastic contamination across freshwater environments, finding these particles in virtually all rivers and lakes studied — including remote wilderness areas. Microfibers from synthetic textiles are consistently the most common type found, suggesting laundry runoff is a major and underappreciated source.
Microplastics in Freshwater Ecosystems
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Researchers reviewed the widespread presence of microplastics in freshwater environments — including remote lakes and rivers — finding that microfibers from textiles are the most commonly detected type. Since freshwater is a source of drinking water and food, its contamination with microplastics has direct implications for human health.
Microplastic Ingestion by Fish in a Neotropical Reservoir: Effects of Reservoir Dynamics and Fish Traits
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Researchers examined microplastic ingestion by fish communities across different zones of a Neotropical reservoir in Brazil, finding that fish in calmer, lake-like zones and bottom-dwelling insect-eating species were most likely to ingest plastic particles. The study suggests that both reservoir design and fish ecology shape how microplastics move through freshwater food webs.
Ingestion of Microplastic by Fish of Different Feeding Habits in Urbanized and Non-urbanized Streams in Southern Brazil
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