Exogenous rare earth element-yttrium deteriorated soil microbial community structure
来源期刊：JOURNAL OF RARE EARTHS2018年第4期
论文作者：Caigui Luo Yangwu Deng Jian Liang Sipin Zhu Zhenya Wei Xianping Luo
文章页码：430 - 439
摘 要：In this study, we selected yttrium as the representative of REEs to investigate the impacts of exogenous yttrium on soil physicochemical properties and microbiota. The results showed that exogenous yttrium has no significant effect on soil physical properties but a significantly negative impact on soil chemical properties. The results of high-throughput sequencing demonstrate that exogenous yttrium significantly decreases the number of OTUs, ACE, Chao 1, and Shannon indices while increases the Simpson index（P < 0.05）, indicating the low soil microbial diversity. The relative abundances of soil microbes are significantly changed at phylum and genus level. Principal component analysis（PCA） showed the significant difference of microbial community between yttrium treatments（YCl3-250 and YCl3-500） and non-yttrium treatment（CK） and the similarity of that between YCl3-250 and YCI3-500. Proteobacteria and Bacteroidetes are found to be the most tolerant phyla to exogenous yttrium while Verrucomicrobia the most sensitive phylum. Redundancy analysis（RDA） results suggest that exogenous yttrium affects soil microbiota only through changing the soil chemical properties but not soil physical properties, and C/N ratio is the key environmental factor.
Caigui Luo1,2,3，Yangwu Deng1,2,3，Jian Liang1,3，Sipin Zhu1,3，Zhenya Wei1,3，Xianping Luo1,2,3
1. Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology3. Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control
摘 要：In this study, we selected yttrium as the representative of REEs to investigate the impacts of exogenous yttrium on soil physicochemical properties and microbiota. The results showed that exogenous yttrium has no significant effect on soil physical properties but a significantly negative impact on soil chemical properties. The results of high-throughput sequencing demonstrate that exogenous yttrium significantly decreases the number of OTUs, ACE, Chao 1, and Shannon indices while increases the Simpson index（P < 0.05）, indicating the low soil microbial diversity. The relative abundances of soil microbes are significantly changed at phylum and genus level. Principal component analysis（PCA） showed the significant difference of microbial community between yttrium treatments（YCl3-250 and YCl3-500） and non-yttrium treatment（CK） and the similarity of that between YCl3-250 and YCI3-500. Proteobacteria and Bacteroidetes are found to be the most tolerant phyla to exogenous yttrium while Verrucomicrobia the most sensitive phylum. Redundancy analysis（RDA） results suggest that exogenous yttrium affects soil microbiota only through changing the soil chemical properties but not soil physical properties, and C/N ratio is the key environmental factor.
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