Variations of soil microbial communities along a valley bottom of the loess plateau and the influencing factors
HOU Fang-bin1, WANG Rui1, Salman Ali2, GAO Xin1, GUO Sheng-li1,3
1. State Key Laboratory of soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A & F University, Yangling 712100, China;
2. College of Resource and Environment, Northwest A & F University, Yangling 712100, China;
3. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resource, Yangling 712100, China
Sediments were collected from up-to down-stream along a valley bottom on the Loess Plateau. Physicochemical properties of the collected sediments were measured and the characteristics of bacterial and fungal communities in the sediment samples were also determined using the high-throughput sequencing of 16S rRNA gene fragment and ITS. From up-to down-stream of the studied valley, the relative abundance of Bacteroidetes and Firmicutes in the collected sediments increased by 6.6% and 10.5% respectively, and the relative abundance of Proteobacteria decreased by 15.1%. The relative abundance of Basidiomycota increased by 7.7%, while the relative abundance of Ascomycota decreased by 30.2%. The bacterial richness (Chao1index) and diversity (Shannon index) were negatively correlated with sediment clay content (P<0.05), while the correlations between clay content and fungal were not significant. The richness and diversity of bacterial and fungal communities were also correlated with sediment SOC and Olsen-P (P<0.05). Therefore, sediment compositions and nutrient content appeared to be a crucial factor influencing the spatial variability of sediment microbial communities and diversity.
侯芳彬, 王蕊, Salman Ali, 高鑫, 郭胜利. 黄土区沟道泥沙微生物群落变化特征及其影响因素[J]. 中国环境科学, 2019, 39(10): 4350-4359.
HOU Fang-bin, WANG Rui, Salman Ali, GAO Xin, GUO Sheng-li. Variations of soil microbial communities along a valley bottom of the loess plateau and the influencing factors. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(10): 4350-4359.
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