Microplastics Interception from Riverine Ecosystems and Translocation to Fish Internal Organs.
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| Main Authors: | , , |
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| Format: | Artículo científico |
| Language: | en |
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Scientific reports
2026
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| _version_ | 1868266067051151362 |
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| author | Papini, Giulia Boglione, Clara Rakaj, Arnold |
| author_facet | Papini, Giulia Boglione, Clara Rakaj, Arnold Papini, Giulia Boglione, Clara Rakaj, Arnold |
| collection | PubMed - marine biology |
| contents | Microplastics Interception from Riverine Ecosystems and Translocation to Fish Internal Organs. Papini, Giulia Boglione, Clara Rakaj, Arnold Animals Microplastics Ecosystem Rivers Water Pollutants, Chemical Environmental Monitoring Fishes Microplastics (MPs) are widespread in aquatic environments, yet the links between environmental contamination, fish interception, and translocation to internal organs remain poorly understood. This study provides the first integrated assessment of MP contamination in an urban river system, quantifying concentrations in the water column and tracing their interception and organ-specific accumulation in a bioindicator freshwater fish, the planktivorous bleak (Alburnus arborella). MPs were characterized by concentration, shape, and size in six organs: gastrointestinal tract, liver, kidney, muscle, brain, and gonads. Remarkable loads of MPs were detected downstream of a metropolitan area and in all examined organs, with the liver and kidney showing the highest concentrations. Trophic ecology emerged as a key driver of active-indirect MP uptake via contaminated prey. Organ-specific translocation pathways were identified, with long fibers dominating in muscle, fragments in the kidney, and small spheres in the brain, the latter suggesting a higher capacity to cross the hematoencephalic barrier. These results demonstrate that size and shape of MPs, together with feeding ecology, govern MP interception and distribution dynamics, highlighting smaller MPs as a particular risk. The findings fill a critical gap in freshwater MP contamination research, underscore the need for further field-based studies on bioaccumulation and long-term exposure effects, and highlight the importance of incorporating MP morphology and ecological interactions into environmental risk assessments. |
| format | Artículo científico |
| id | pubmed_41896638 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | Scientific reports |
| record_format | pubmed |
| spellingShingle | Microplastics Interception from Riverine Ecosystems and Translocation to Fish Internal Organs. Papini, Giulia Boglione, Clara Rakaj, Arnold Animals Microplastics Ecosystem Rivers Water Pollutants, Chemical Environmental Monitoring Fishes Microplastics Interception from Riverine Ecosystems and Translocation to Fish Internal Organs. Papini, Giulia Boglione, Clara Rakaj, Arnold Animals Microplastics Ecosystem Rivers Water Pollutants, Chemical Environmental Monitoring Fishes Microplastics (MPs) are widespread in aquatic environments, yet the links between environmental contamination, fish interception, and translocation to internal organs remain poorly understood. This study provides the first integrated assessment of MP contamination in an urban river system, quantifying concentrations in the water column and tracing their interception and organ-specific accumulation in a bioindicator freshwater fish, the planktivorous bleak (Alburnus arborella). MPs were characterized by concentration, shape, and size in six organs: gastrointestinal tract, liver, kidney, muscle, brain, and gonads. Remarkable loads of MPs were detected downstream of a metropolitan area and in all examined organs, with the liver and kidney showing the highest concentrations. Trophic ecology emerged as a key driver of active-indirect MP uptake via contaminated prey. Organ-specific translocation pathways were identified, with long fibers dominating in muscle, fragments in the kidney, and small spheres in the brain, the latter suggesting a higher capacity to cross the hematoencephalic barrier. These results demonstrate that size and shape of MPs, together with feeding ecology, govern MP interception and distribution dynamics, highlighting smaller MPs as a particular risk. The findings fill a critical gap in freshwater MP contamination research, underscore the need for further field-based studies on bioaccumulation and long-term exposure effects, and highlight the importance of incorporating MP morphology and ecological interactions into environmental risk assessments. |
| title | Microplastics Interception from Riverine Ecosystems and Translocation to Fish Internal Organs. |
| topic | Animals Microplastics Ecosystem Rivers Water Pollutants, Chemical Environmental Monitoring Fishes |
| url | https://pubmed.ncbi.nlm.nih.gov/41896638/ |