The influence of soil properties and geographical distance on the bacterial community compositions of paddy soils enriched on SMFC anodes

文献类型： 外文期刊

第一作者： Yuan, Hai-Yan

作者： Yuan, Hai-Yan;Li, Xiao-Ming;Zhu, Yong-Guan;Sun, Guo-Xin;Yuan, Hai-Yan;Li, Xiao-Ming;Liu, Pan-Pan;Wang, Ning;Zhu, Yong-Guan;Khan, Shams Tabrez;Alkhedhairy, Abdulaziz A.

作者机构：

关键词： Exoelectrogen;Geographic distance;SMFCs;Soil property

期刊名称：JOURNAL OF SOILS AND SEDIMENTS （ 影响因子：3.308； 五年影响因子：3.586 ）

ISSN： 1439-0108

年卷期： 2018 年 18 卷 2 期

页码：

收录情况： SCI

摘要： Exoelectrogens are important microorganisms playing crucial roles in the biogeochemistry of elements in paddy soils. But it remains unclear how the soil properties and geographical distances affect the exoelectrogen communities of Chinese paddy soils. So the objectives of this study were to investigate the diversity and composition of these microbial communities which were enriched on the anodes of soil microbial fuel cells (SMFCs) and to elucidate the links between the microbial community compositions and their driving factors. We used Illumina HiSeq sequencing to determine the bacterial community structures which were enriched on the anodes of SMFCs. Variance partitioning analysis (VPA) was used to obtain the contribution of soil properties and geographical distance to the variations of bacterial communities. Active bacterial community on anodes of the closed circuit SMFCs differs significantly from the control open circuit SMFCs. Anodes of all the closed circuit SMFCs were characterized by the presence of high numbers of Nitrospira and Anaerolineae. Taxonomic similarities and phylogenetic similarities of bacterial communities from different paddy soil samples across North and South China were found to be significantly correlated with geographical distances. The relationship between the similarities and the geographic distance exhibited a distance-decay relationship. VPA showed that both geographical distances and soil properties affect the structure of bacterial communities detected on anodes. Our study gives a foundation for understanding the distribution and diversity of exoelectrogens in paddy soils and elucidates the links between the distribution and the diversity of extracellular respiring bacteria and their driving factors. Furthermore, this study also identifies the crucial factors which should be used to evaluate the response of exoelectrogens to environmental perturbations in Chinese paddy soils.

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