Responses of soil bacterial communities, enzyme activities, and nutrients to agricultural-to-natural ecosystem conversion in the Loess Plateau, China

	Responses of soil bacterial communities, enzyme activities, and nutrients to agricultural-to-natural ecosystem conversion in the Loess Plateau, China
	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; Zhang, YJ (Zhang, Yanjiang)1; Zhang, XC (Zhang, Xingchang)1
刊名	JOURNAL OF SOILS AND SEDIMENTS
	2019-03
卷号	19 期号:3 页码:1427-1440
关键词	16S rRNA sequencing Enzyme activities Loess Plateau Nutrient cycling Vegetation succession
产权排序	4
英文摘要	PurposeSoil microbial communities play critical function during nutrient cycling. However, with the increasing nutrient input into terrestrial ecosystems from human activities, the responses of soil microorganisms to the aboveground vegetation across agricultural-to-natural succession stages are still poorly understand. The aim of this study was to evaluate the changes of soil microbial communities in three typical succession stages (the cropland, the grassland, and the brushland, respectively).Materials and methodsA field experiment was carried out in an ecological restoration region. Soil samples were collected from three succession stages (the cropland, the grassland, and the brushland) based on their well-dated successional chronosequence in July 2016. Illumina MiSeq sequencing was used to identify the bacterial community structures. The responses of soil bacterial communities and its relationships with soil physicochemical properties and enzyme activities were assessed.Results and discussionThe results showed that soil nutrients (soil organic carbon(SOC), total N, and NH4+) and enzyme activities (-1,4-glucosidase and phosphatase) were significantly increased across the conversion from agricultural to natural ecosystem, and the enzyme activities were significantly affected by SOC and total N. It indicated that vegetation restoration greatly improved soil quality and nutrient cycling rates mediated by microbial metabolisms. Furthermore, there were no changes in soil bacterial community structures during the three vegetation succession stages, which implied the stability and adaption of microbial communities under the vegetation succession in semiarid climate. It should be noted that Firmicutes taxa were more sensitive than other taxa during natural vegetation recovery. Structural equation model (SEM) revealed that soil nutrients (soil organic matter (SOM) and total P), element stoichiometry (SOC:total P), and extracellular enzyme activities (urease and alkaline phosphatase) were dominant factors to shape the relative abundance of Firmicutes.ConclusionsFirmicutes can be considered as bio-indicators to monitor soil quality and nutrient turnover during natural vegetation recovery. This study presents better understanding about the connections among soil nutrient cycling, enzyme activities, and soil bacterial communities during vegetation natural restoration, especially in typical ecological critical zone.
语种	英语
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/10962]
专题	地球环境研究所_生态环境研究室
通讯作者	Fang, LC (Fang, Linchuan)
作者单位	1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Govt Newfoundland & Labrador, Dept Fisheries & Land Resources, Agr Prod & Res Div, Corner Brook, NF A2H 6J8, Canada; 4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Cui, YX ,Fang, LC ,Guo, XB ,et al. Responses of soil bacterial communities, enzyme activities, and nutrients to agricultural-to-natural ecosystem conversion in the Loess Plateau, China[J]. JOURNAL OF SOILS AND SEDIMENTS,2019,19(3):1427-1440.
APA	Cui, YX .,Fang, LC .,Guo, XB .,Wang, X .,Wang, YQ .,...&Zhang, XC .(2019).Responses of soil bacterial communities, enzyme activities, and nutrients to agricultural-to-natural ecosystem conversion in the Loess Plateau, China.JOURNAL OF SOILS AND SEDIMENTS,19(3),1427-1440.
MLA	Cui, YX ,et al."Responses of soil bacterial communities, enzyme activities, and nutrients to agricultural-to-natural ecosystem conversion in the Loess Plateau, China".JOURNAL OF SOILS AND SEDIMENTS 19.3(2019):1427-1440.