Abstract
Nanoparticulate-Nd2O3 (nano-Nd2O3) has been excessively utilized in agriculture, industry, and medicine. Hence, nano-Nd2O3 can have environmental implications. However, the impact of nano-Nd2O3 on alpha diversity, composition, and function of soil bacterial communities has not been thoroughly evaluated. We amended soil to achieve different concentrations of nano-Nd2O3 (0, 10, 50, and 100 mg kg−1 soil) and incubated the mesocosms for 60 days. On days 7 and 60 of the experiment, we measured the effect of nano-Nd2O3 on alpha diversity and composition of soil bacterial community. Further, the effect of nano-Nd2O3 on the function of soil bacterial community was assessed based on changes in the activities of the six potential enzymes that mediate the cycling of nutrients in the soil. Nano-Nd2O3 did not alter the alpha diversity and composition of the soil bacterial community; however, it negatively affected community function in a dose-dependent manner. Specifically, the activities of β-1,4-glucosidase and β-1,4-n-acetylglucosaminidase that mediate soil carbon and nitrogen cycling, respectively, were significantly affected on days 7 and 60 of the exposure. The effect of nano-Nd2O3 on the soil enzymes correlated with changes in relative abundances of the rare and sensitive taxa, viz., Isosphaerales, Isosphaeraceae, Ktedonobacteraceae, and Streptomyces. Overall, we provide information for the safe implementation of technological applications that use nano-Nd2O3.
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The datasets used or analyzed in this study are available from the corresponding author on reasonable request.
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We thank the people who participated in this study.
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This work was supported by the National Natural Science Foundation of China (42177274 and 41671254) and State Key Laboratory of Urban and Regional Ecology (SKLURE2022-1-3).
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Yongli Xu: writing — review and editing, investigation, and methodology. Liyao Zhu: methodology, data curation, visualization, and writing — original draft. Raja Vukanti: writing — review and editing. Jichen Wang: conceptualization, data curation. Congcong Shen: investigation, data curation. Yuan Ge: conceptualization, methodology, supervision, funding acquisition, and writing — review and editing.
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Xu, Y., Zhu, L., Vukanti, R. et al. Nano-Nd2O3 reduced soil bacterial community function by altering the relative abundance of rare and sensitive taxa. Environ Sci Pollut Res 30, 78332–78338 (2023). https://doi.org/10.1007/s11356-023-27979-y
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DOI: https://doi.org/10.1007/s11356-023-27979-y