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| Format: | Artículo científico |
| Sprache: | en |
| Veröffentlicht: |
The Science of the total environment
2026
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| Schlagworte: | |
| Online-Zugang: | https://pubmed.ncbi.nlm.nih.gov/41915958/ |
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Inhaltsangabe:
- Biochemical responses and ingestion of microplastics by native fishes in the Atlantic Forest, southern Brazil. Neundorf, Ananda Karla Alves Corrêa, Ana Paula Nascimento Zepson-Capucho, João Mateus Riuzim, Yara Tani de Assis Teixeira da Silva, Ubiratã Vitule, Jean Ricardo Simões Fávaro, Luís Fernando Cabral, Ana Caroline de Castro Martins, César Padial, André Andrian Donatti, Lucélia Animals Brazil Microplastics Water Pollutants, Chemical Environmental Monitoring Fishes Rivers Forests Biomarkers Urban expansion in areas of the Atlantic Forest, one of the planet's biodiversity hotspots, has intensified the anthropogenic pressure on its rivers, promoting the introduction of distinct stressors, including organic contaminants, and microplastics (MPs). This study evaluated the health of fish assemblages along a contamination gradient in the Guaraguaçu River (southern Brazil), located within the Atlantic Forest Biosphere Reserve, that encompassing upstream preserved areas and downstream sites impacted by sewage and landfill inputs. Sediment organic contaminants, water physico-chemical parameters, and biochemical biomarkers were assessed in Deuterodon langei and Geophagus iporangensis, while MPs in the gastrointestinal tract were quantified in these and additional species representing different trophic guilds. Overall, midstream sectors showed increased biomarker activities compared to the less impacted upstream area. Gills responses were similar between D. langei and G. iporangensis, whereas muscle acetylcholinesterase activity was lower in upstream G. iporangensis. MP abundance was highest in carnivores at midstream areas than less impacted sector, and MP concentrations were overall greatest in omnivores than carnivores and invertivores. These findings reveal species-specific biochemical plasticity and trophic-dependent MP accumulation along the Guaraguaçu River gradient. The study provides evidence that even sectors considered least impacted may experience biochemical alterations, emphasizing the need for continuous biomonitoring in the Atlantic Forest Biosphere Reserve.