Impacts of low concentrations of nanoplastics on leaf litter decomposition and food quality for detritivores in streams.

Autor: Seena S; Marine and Environmental Sciences Centre (MARE), Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, Coimbra 3000-456, Portugal. Electronic address: seena.sahadevan@uc.pt., Gutiérrez IB; Marine and Environmental Sciences Centre (MARE), Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, Coimbra 3000-456, Portugal., Barros J; Marine and Environmental Sciences Centre (MARE), Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, Coimbra 3000-456, Portugal., Nunes C; CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Aveiro 3810-193, Portugal., Marques JC; Marine and Environmental Sciences Centre (MARE), Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, Coimbra 3000-456, Portugal., Kumar S; Division of Chemical Engineering, Konkuk University, Seoul 05029, South Korea., Gonçalves AMM; Marine and Environmental Sciences Centre (MARE), Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, Coimbra 3000-456, Portugal; Department of Biology & CESAM, University of Aveiro, Aveiro 3810-193, Portugal.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2022 May 05; Vol. 429, pp. 128320. Date of Electronic Publication: 2022 Jan 21.
DOI: 10.1016/j.jhazmat.2022.128320
Abstrakt: In forested streams, leaf litter decomposition is a vital ecosystem process, governed primarily by aquatic hyphomycetes. These fungi are crucial mediators of nutrients and energy to invertebrates and higher trophic levels. Very little information is available on the impact of low concentrations of different sizes of nanoplastic particles (NPPs) on leaf litter decomposition and aquatic hyphomycetes communities. Besides, NPPs impact on leaf litter nutritional quality and invertebrate feeding behaviour is unknown. We conducted a microcosm assay with varying concentrations (0-25 μg L -1 ) of small (100 nm; SNPPs) and large (1000 nm; LNPPs) plastic particles to assess their impact on leaf litter decomposition, sporulation rates and community structure of aquatic hyphomycetes. Furthermore, leaf litter was retrieved and fed to invertebrates to assess feeding rates. Our results indicated that leaf litter decomposition, fungal sporulation and abundance were significantly affected by NPPs concentrations and sizes. By contrast, leaf litter nutritional quality was impacted only by sizes. The NPPs, particularly SNPPs, augmented leaf litter polyunsaturated fatty acids (18-31%), consequently improving food quality; however, invertebrates' feeding rates were not impacted. Overall, our study provides novel insights on the risks posed by NPPs with pronounced impact at the basal trophic level.
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Databáze: MEDLINE
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