Shift in soil microbial communities with shrub encroachment in Inner   Mongolia grasslands, China

doi:10.1016/j.ejsobi.2017.02.004

CORC > 北京大学 > 城市与环境学院

	Shift in soil microbial communities with shrub encroachment in Inner Mongolia grasslands, China
	Li, He ; Zhang, Jianhua ; Hu, Huifeng ; Chen, Leiyi ; Zhu, Yankun ; Shen, Haihua ; Fang, Jingyun
刊名	EUROPEAN JOURNAL OF SOIL BIOLOGY
	2017
关键词	Climate factors Edaphic factors Microbial community PLFA Shrub encroachment WOODY PLANT ENCROACHMENT PHOSPHOLIPID FATTY-ACID CARBON SEQUESTRATION SEMIARID GRASSLANDS FUNGAL COMMUNITIES LAND-USE PHOSPHORUS BACTERIAL ECOSYSTEM IMPACTS
DOI	10.1016/j.ejsobi.2017.02.004
英文摘要	The ongoing expansion of shrub encroachment into grasslands represents a unique form of land cover change. How this process affects soil microbial communities is poorly understood. In this study, we aim to assess the effects of shrub encroachment on soil microbial biomass, abundance and composition by comparing data between shrub patches and neighboring herb patches in shrub-encroached grasslands (SEGs) in Inner Mongolia, China. Fourteen SEG sites from two ecosystem types (typical and desert grasslands) were investigated. The phospholipid fatty acid (PLFA) method was used to analyze the composition and biomass of the soil microbial community. Our results showed that the top-soil microbial biomass and abundances of gram-negative bacteria, arbuscular mycorrhizal fungi, and actinomycetes were significantly higher in shrub patches than in herb patches in both typical and desert grasslands (P < 0.05). The fungi to "bacteria ratio was significantly higher in shrub patches than in herb patches in desert grassland (P < 0.05). The microbial biomass was positively associated with mean annual precipitation, total nitrogen and available phosphorus, and negatively associated with mean annual "temperature. Our results also indicated that the variation in microbial composition was largely explained by edaphic factors, followed by climate factors. In conclusion, shrub encroachment in Inner Mongolia grasslands has significantly influenced the structure and abundance of soil microbial communities, which makes the microbial communities toward a fresh organic carbon-based structure. This study highlights the importance of edaphic and climate factors in microbial community shifts in SEGs. (C) 2017 Elsevier Masson SAS. All rights reserved.; National Natural Science Foundation of China [31330012, 31470525, 31400364]; National Basic Research Program of China on Global Change [2014CB954001]; China Postdoctoral Science Foundation [2016M591282]; SCI(E); ARTICLE; 40-47; 79
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/474712]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Li, He,Zhang, Jianhua,Hu, Huifeng,et al. Shift in soil microbial communities with shrub encroachment in Inner Mongolia grasslands, China[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY,2017.
APA	Li, He.,Zhang, Jianhua.,Hu, Huifeng.,Chen, Leiyi.,Zhu, Yankun.,...&Fang, Jingyun.(2017).Shift in soil microbial communities with shrub encroachment in Inner Mongolia grasslands, China.EUROPEAN JOURNAL OF SOIL BIOLOGY.
MLA	Li, He,et al."Shift in soil microbial communities with shrub encroachment in Inner Mongolia grasslands, China".EUROPEAN JOURNAL OF SOIL BIOLOGY (2017).