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Responses of soil microbial communities to nutrient limitation in thedesert-grassland ecological transition zone
Cui,YX(Cui,Yongxing)1,2; Fang,LC(Fang,Linchuan)1; Guo,XB(Guo,Xiaobin)3; Wang,X(Wang,Xia)1,2; Wang,YQ(Wang,Yunqiang)4; Li,PF(Li,Pengfei)1,2; Zhang,YJ(Zhang,Yunjiang)1; Zhang,XC(Zhang,Xingchang)2; Fang,Linchuan
2018-06-18
发表期刊Science of the Total Environment
卷号642期号:2018页码:45-55
文章类型期刊论文
摘要Soil microorganisms are crucial to indicate ecosystem functions of terrestrial ecosystems. However, the responses of microbial communities to soil nutrient limitation in desert-grassland are still poorly understood. Hence, we investigated soil microbial community structures and metabolic characteristics in a desert-grassland ecological transition zone from the northern Loess Plateau, China, and explored the association of microbial communities with nutrient limitation via high-throughput sequencing. Threshold elemental ratios (TER) indicated that the microbial communities were strongly limited by nitrogen (N) under A. ordosica and P. tabuliformis communities. The phosphorus (P) limitation of microbial communities was observed in the aeolian sandy soil. The results imply that soil microbial communities had strong nutrient competition for N and P with aboveground vegetation in arid and oligotrophic ecosystems. The LEfSe and linear regression analysis revealed that the microbial taxa of Micrococcales, Micrococcaceae and Herpotrichiellaceae were significantly correlated with microbial N limitation. The Thermoleophilia taxa were significantly correlated with microbial P limitation. These biomarkers related to microbial nutrient limitation could be considered as the key microbial taxa to shape microbial communities and functions. Furthermore, N form had different effects on microbial communities, which NH4+-N strongly affected bacterial communities, whereas NO3--N had a significant influence on fungal communities. The different responses indicate that soil microorganisms had corresponding nutrient preferences for bacterial and fungal communities, which might alleviate the nutrient limitations and environmental stress. This study provided important insights on microbial community structures linking to community functions and on the mechanisms governing microbial N and P limitation in arid land ecosystems.
关键词Ecological Transition Zone Community Function Enzyme 16s Rrna Its Rrna Nutrient Limitation
DOI10.1016/j.scitotenv.2018.06.033
收录类别SCI
所属项目编号41571314 ; 41201226 ; XAB2016A03
语种英语
项目资助者National Natural ScienceFoundation of China ; National Natural ScienceFoundation of China ; CAS “Light of WestChina” Program ; CAS “Light of WestChina” Program
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文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5354
专题生态环境研究室
通讯作者Fang,Linchuan
作者单位1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100, PR China
2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling712100, PR China
3.Agriculture Production and Research Division, Department of Fisheries and Land Resources, Government of Newfoundland and Labrador, Corner Brook, NL A2H 6J8, Canada
4.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, Shaanxi 710061, PR China
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Cui,YX,Fang,LC,Guo,XB,et al. Responses of soil microbial communities to nutrient limitation in thedesert-grassland ecological transition zone[J]. Science of the Total Environment,2018,642(2018):45-55.
APA Cui,YX.,Fang,LC.,Guo,XB.,Wang,X.,Wang,YQ.,...&Fang,Linchuan.(2018).Responses of soil microbial communities to nutrient limitation in thedesert-grassland ecological transition zone.Science of the Total Environment,642(2018),45-55.
MLA Cui,YX,et al."Responses of soil microbial communities to nutrient limitation in thedesert-grassland ecological transition zone".Science of the Total Environment 642.2018(2018):45-55.
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