Mass-based trophic transfer of polystyrene nanoplastics in the lettuce-snail food chain
| 第一作者： |
Li, Yanjun |
| 英文第一作者： |
Li, Yanjun |
| 联系作者： |
Yu, Yong |
| 英文联系作者： |
Yu, Yong |
| 发表年度： |
2023 |
| 卷： |
897 |
| 摘要： |
To investigate the potential transfer of nanoplastics (NPs) from water to plants and subsequently to a higher trophic level, we established a food chain and evaluated the trophic transfer of polystyrene (PS) NPs based on mass concentra-tions by pyrolysis gas chromatography-mass spectrometry. Lettuce plants were cultivated in Hoagland solution with varying concentrations of PS-NPs (0.1, 1, 10, 100 and 1000 mg/L) for a period of 60 d and then a total of 7 g lettuce shoot was fed to snails for 27 d. Shoot biomass exposed at 1000 mg/L PS-NPs was reduced by 36.1 %. No significant change in root biomass was observed, however, root volume was reduced by 25.6 % at 100 mg/L. Moreover, PS-NPs were detected in both lettuce roots and shoots across all concentrations. Additionally, PS-NPs were transferred to snails and primarily found in feces (>75 %). Only 28 ng/g of PS-NPs were detected in the soft tissue of snails indirectly ex-posed at 1000 mg/L. Although PS-NPs were bio-diluted when transferred to species at higher trophic levels, they sig-nificantly inhibited the growth of snails, indicating that their potential risk to high trophic levels cannot be ignored. This study provides key information on trophic transfer and patterns of PS-NPs in food chains and helps to evaluate risk of NPs in terrestrial ecosystem. |
| 刊物名称： |
SCIENCE OF THE TOTAL ENVIRONMENT |
| 参与作者： |
Li, Yanjun; Lin, Xiaolong; Wang, Jian; Xu, Guanghui; Yu, Yong |
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