Polystyrene nanoplastics affect digestive function and growth in juvenile groupers
| Autor: | Xuefeng Wu, Xianze Jia, Xuzhuo Duan, Kaishan Liang, Peng Xu, Qing Wang, Wenbiao Niu, Fengqi Huang, Lei Zhou |
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| Rok vydání: | 2021 |
| Předmět: |
Environmental Engineering
Microplastics chemistry.chemical_compound Aliivibrio medicine Environmental Chemistry Juvenile Animals Food science Lipase Waste Management and Disposal biology Juvenile fish Epinephelus biology.organism_classification Trypsin Pollution Vibrio chemistry Seafood biology.protein Nanoparticles Polystyrenes Bass Lysozyme Plastics Water Pollutants Chemical medicine.drug |
| Zdroj: | The Science of the total environment. 808 |
| ISSN: | 1879-1026 |
| Popis: | Polystyrene nanoplastics (PS-NPs) can impair antioxidant, immune, and nervous system functions as well as growth and development in aquatic organisms. At present, however, little is known about the effects and underlying mechanisms of PS-NPs on the digestive system of marine fish. Here, we studied the effects of these plastics on the intestinal health and growth performance of juvenile orange-spotted groupers (Epinephelus coioides). Based on histopathological analysis, we found that the liver and intestines can uptake PS-NPs at exposure concentrations of 300 and 3000 μg/ml, respectively. After 14 d of exposure, the activities of digestive enzymes lipase (LPS), trypsin (TRS), and lysozyme (LZM) were reduced, indicating that PS-NPs negatively affected digestive function in juvenile groupers. The PS-NPs also altered microbial community composition, resulting in a decrease in diversity and simplification of network relationships in the intestinal microbiota, but a significant increase in certain harmful bacteria, especially Vibrio and Aliivibrio. In addition, community assembly changed from being driven primarily by deterministic processes (68.89% for control group) to stochastic processes (73.33% and 51.11% for 300 and 3000 μg/ml PS-NP exposure groups, respectively). Furthermore, the specific growth rate (SGR) of the juvenile orange-spotted groupers decreased significantly with increasing PS-NP exposure concentrations (0.158% ± 0.032%, 0.095% ± 0.020%, and 0.074% ± 0.016% for 0, 300, and 3000 μg/L PS-NP groups, respectively). These results suggest that marine PS-NPs are harmful to the digestive system of juvenile fish and highlight the importance of evaluating the long-term impact of NPs in reshaping marine populations. |
| Databáze: | OpenAIRE |
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