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- W2945178566 abstract "Soil ecosystems surrounding chromium slag undergo continuous harsh physicochemical conditions due to multiple heavy metals contamination. Previous studies of soil microbial communities mainly focused on surface soil layer, while little was known about the depth-related distributions of the microbial communities in chromium (Cr)-contaminated soil. In this study, a comprehensive analysis of depth-related distributions of microbial communities in Cr-contaminated soil was carried out by Illumina sequencing of 16s rRNA genes. The results revealed that bacterial diversities at 0 cm depth layer were significantly higher than those below 20 cm depths. And there was a remarkable difference in bacterial compositions along with the sampling depths especially for the dominant phyla of Proteobacteria, Actinobacteria, Chloroflexi and Fimicutes (p < 0.05). While the archaea accounted for a relatively low proportion of the microbes and showed stability in the compositions with the predominant phyla of Thaumarchaeota and Euryarchaeota. The linear discriminate analysis (LDA) and effect size (LEfSe) analysis showed that there were thirty-seven kinds of biomarker microbes existing in the five soil layers with LDA threshold of 4.0, and each layer showed distinct microbial divisions, indicating that microbes with different biological functions might survive along with the sampling depths. The environmental variables including total chromium (Cr), Cr(Ⅵ), Mn, Ni, and Zn had considerable influences on microbial community composition in the contaminated soil. A total of 25 Cr(Ⅵ)-reducing strains were further isolated and identified, which were phylogenetically affiliated to Proteobacteria, Actinobacteria and Firmicutes. Among the isolated Cr(Ⅵ)-reducing strains, Bacillus stratosphericus was the first time to be reported with Cr(Ⅵ) reducing capacity." @default.
- W2945178566 created "2019-05-29" @default.
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- W2945178566 date "2019-09-01" @default.
- W2945178566 modified "2023-10-16" @default.
- W2945178566 title "Vertical distribution of microbial communities in chromium-contaminated soil and isolation of Cr(Ⅵ)-Reducing strains" @default.
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- W2945178566 doi "https://doi.org/10.1016/j.ecoenv.2019.05.023" @default.
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- W2945178566 hasPublicationYear "2019" @default.
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