Abstract：Uranium tailings were collected using the deep drilling engineering and were subsequently high-throughput sequencing on Illumina Miseq platform to characterize the microbial community in the dry uranium tailings pond, aiming at comprehensively revealing the three-dimensional spatial distribution of microbial community in the reservoir area and the correlation between the diversity of microbial community and environmental factors with long-term uranium exposure. Results showed a significant variation of the physical and chemical properties among the collected uranium tailings (P<0.05). Moreover, the diversity of microbial community in uranium tailings was declined in the radioactive environment. In the microbial community, the dominant bacterial taxa in uranium tailings at phylum level belonged to Proteobacteria, Firmicutes, Actinobacteria and Bacteroidetes. Genus Arthrobacter and Gp16 were tolerant of the radioactivity of uranium tailings. Redundancy analysis indicated that environmental factors including radionuclides U, 210Po, 210Pb, metals Mn Ca and pH, SO42-were the main drivers shifting the changes of microbial community in uranium tailings at different depths. The results revealed the succession pattern of microbial community with long-term exposure of radionuclides, providing a scientific value for further exploring potential bioremediation strains.
安毅夫, 孙娟, 高扬, 连国玺, 杨冰. 长期放射性环境下微生物群落多样性变化[J]. 中国环境科学, 2021, 41(2): 923-929.
AN Yi-fu, SUN Juan, GAO Yang, LIAN Guo-xi, YANG Bing. Variation of microbial community diversity with long-term exposure of radionuclides in dry uranium tailings pond. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(2): 923-929.
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