干旱区生态环境知识资源中心(Arid): Distinct Assembly Processes and Determinants of Soil Microbial Communities between Farmland and Grassland in Arid and Semiarid Areas

Arid

DOI	10.1128/AEM.01010-21
	Distinct Assembly Processes and Determinants of Soil Microbial Communities between Farmland and Grassland in Arid and Semiarid Areas
	Xu, Aiai; Liu, Jie; Guo, Zhiying; Wang, Changkun; Pan, Kai; Zhang, Fangfang; Pan, Xianzhang
通讯作者	Pan, XZ (corresponding author), Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing, Peoples R China. ; Pan, XZ (corresponding author), Univ Chinese Acad Sci, Beijing, Peoples R China.
来源期刊	APPLIED AND ENVIRONMENTAL MICROBIOLOGY
ISSN	0099-2240
EISSN	1098-5336
出版年	2021
卷号	87 期号:22
英文摘要	It is critical to identify the assembly processes and determinants of soil microbial communities to better predict soil microbial responses to environmental change in arid and semiarid areas. Here, soils from 16 grassland-only, 9 paired grassland and farmland, and 16 farmland-only sites were collected across the central Inner Mongolia Plateau, covering a steep environmental gradient. Through analyzing the paired samples, we discovered that land uses had strong effects on soil microbial communities but weak effects on their assembly processes. For all samples, although no environmental variables were significantly correlated with the net relatedness index (NRI), both the nearest taxon index (NTI) and the beta-nearest taxon index (beta NTI) were most related to mean annual precipitation (MAP). With the increase of MAP, soil microbial taxa at the tips of the phylogenetic tree were more clustered, and the contribution of determinism increased. Determinism (48.6%), especially variable selection (46.3%), and stochasticity (51.4%) were almost equal in farmland, while stochasticity (75.0%) was dominant in grassland. Additionally, Mantel tests and redundancy analyses (RDA) revealed that the main determinants of soil microbial community structure were MAP in grassland but mean annual temperature (MAT) in farmland. MAP and MAT were also good predictors of the community composition (the top 200 dominant operational taxonomic units) in grassland and farmland, respectively. Collectively, in arid and semiarid areas, soil microbial communities were more sensitive to environmental change in farmland than in grassland, and unlike the major impact of MAP on grassland microbial communities, MAT was the primary driver of farmland microbial communities. IMPORTANCE As one of the most diverse organisms, soil microbes play indispensable roles in many ecological processes in arid and semiarid areas with limited macrofaunal and plant diversity, yet the mechanisms underpinning soil microbial community are not fully understood. In this study, soil microbial communities were investigated along a 500-km transect covering a steep environmental gradient across farmland and grassland in the areas. The results showed that precipitation was the main factor mediating the assembly processes. Determinism was more influential in farmland, and variable selection of farmland was twice that of grassland. Temperature mainly drove farmland microbial communities, while precipitation mainly affected grassland microbial communities. These findings provide new information about the assembly processes and determinants of soil microbial communities in arid and semiarid areas, consequently improving the predictability of the community dynamics, which have implications for sustaining soil microbial diversity and ecosystem functioning, particularly under global climate change conditions.
英文关键词	soil microbial community community assembly determinant arid semiarid farmland grassland
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000713169300001
WOS关键词	BACTERIAL COMMUNITIES ; FUNGAL COMMUNITIES ; GLOBAL PATTERNS ; LAND-USE ; PLANT ; BIOGEOGRAPHY ; TEMPERATURE ; PHYLOGENIES ; DIVERSITY ; SEQUENCES
WOS类目	Biotechnology & Applied Microbiology ; Microbiology
WOS研究方向	Biotechnology & Applied Microbiology ; Microbiology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368214
作者单位	[Xu, Aiai; Liu, Jie; Guo, Zhiying; Wang, Changkun; Pan, Kai; Zhang, Fangfang; Pan, Xianzhang] Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing, Peoples R China; [Xu, Aiai; Liu, Jie; Guo, Zhiying; Wang, Changkun; Pan, Kai; Zhang, Fangfang; Pan, Xianzhang] Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Xu, Aiai,Liu, Jie,Guo, Zhiying,et al. Distinct Assembly Processes and Determinants of Soil Microbial Communities between Farmland and Grassland in Arid and Semiarid Areas[J],2021,87(22).
APA	Xu, Aiai.,Liu, Jie.,Guo, Zhiying.,Wang, Changkun.,Pan, Kai.,...&Pan, Xianzhang.(2021).Distinct Assembly Processes and Determinants of Soil Microbial Communities between Farmland and Grassland in Arid and Semiarid Areas.APPLIED AND ENVIRONMENTAL MICROBIOLOGY,87(22).
MLA	Xu, Aiai,et al."Distinct Assembly Processes and Determinants of Soil Microbial Communities between Farmland and Grassland in Arid and Semiarid Areas".APPLIED AND ENVIRONMENTAL MICROBIOLOGY 87.22(2021).