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Differential responses of soil bacterial communities to long-term N and P inputs in a semi-arid steppe
Ling, Ning; Chen, Dima1; Guo, Hui; Wei, Jiaxin; Bai, Yongfei1; Shen, Qirong; Hu, Shuijin2
2017
发表期刊GEODERMA
ISSN0016-7061
卷号292页码:25-33
摘要Both nitrogen (N) and phosphorus (P) may limit plant production in steppes and affect plant community structure. However, few studies have explored in detail the differences and similarities in the responses of below ground microbial communities to long-term N and P inputs. Using a high-throughput Illumina Miseq sequencing platform, we characterized the bacterial communities in a semi-arid steppe subjected to long-term N or P additions. Our results showed that both the Chao richness and Shannon's diversity were negatively correlated to N input rate, while only Chao richness was significantly and negatively correlated to P input rate. Also, both N and P additions altered the bacterial community structure. The bacterial community between plots of the same N or P input rate was much more dissimilar with the higher input level, indicating more severe niche differentiation in pots with higher N or P input. N Inputs significantly increased the relative abundance of the predicted copiotrophic groups (Proteobacteria and Firmicutes) but reduced the predicted oligotrophic groups (Acidobacteria, Nitrospirae, Chloraflexi), with the order Rhizobiales being most affected. P additions significantly affected only two phyla (Armatimonadetes and Chlorobi), which were positively correlated with P source. Results from the structural equation modelling (SEM) showed that N additions affected the bacterial community primarily by changing the pH, while P additions did so mainly by improving P availability. Our results suggest that the below-ground bacterial communities are more sensitive to N inputs, but P inputs can also play an important role in bacterial niche differentiation. These findings improve our understanding of bacterial responses to N and P inputs, and their impacts on bacterial-mediated processes, especially in the context of increasing anthropogenic nutrient inputs. (C) 2017 Elsevier B.V. All rights reserved.
关键词Semi-arid steppe Nor P inputs Soil bacterial diversity Soil bacterial community structure Illumine Miseq sequencing
学科领域Cell Biology ; Developmental Biology
DOI10.1016/j.devcel.2017.11.016
收录类别SCI
语种英语
WOS关键词NITROGEN-FERTILIZATION ; INNER-MONGOLIA ; TERRESTRIAL ECOSYSTEMS ; MICROBIAL COMMUNITIES ; FUNCTIONAL DIVERSITY ; GRASSLAND ; BIODIVERSITY ; LIMITATION ; DEPOSITION ; STABILITY
WOS记录号WOS:000418271900010
出版者ELSEVIER SCIENCE BV
文献子类Article
出版地AMSTERDAM
EISSN1872-6259
资助机构China Postdoctoral Science FoundationChina Postdoctoral Science Foundation [2015M570460, 2016T90473]
作者邮箱shuijin_hu@njau.edu.cn
作品OA属性Bronze
引用统计
被引频次:190[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ibcas.ac.cn/handle/2S10CLM1/22100
专题植被与环境变化国家重点实验室
作者单位1.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Jiangsu, Peoples R China
2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
3.North Carolina State Univ, Dept Plant Pathol, Raleigh, NC 27695 USA
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Ling, Ning,Chen, Dima,Guo, Hui,et al. Differential responses of soil bacterial communities to long-term N and P inputs in a semi-arid steppe[J]. GEODERMA,2017,292:25-33.
APA Ling, Ning.,Chen, Dima.,Guo, Hui.,Wei, Jiaxin.,Bai, Yongfei.,...&Hu, Shuijin.(2017).Differential responses of soil bacterial communities to long-term N and P inputs in a semi-arid steppe.GEODERMA,292,25-33.
MLA Ling, Ning,et al."Differential responses of soil bacterial communities to long-term N and P inputs in a semi-arid steppe".GEODERMA 292(2017):25-33.
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