干旱区生态环境知识资源中心(Arid): Habitat-specific environmental factors regulate spatial variability of soil bacterial communities in biocrusts across northern China's drylands

Arid

DOI	10.1016/j.scitotenv.2020.137479
	Habitat-specific environmental factors regulate spatial variability of soil bacterial communities in biocrusts across northern China's drylands
	Su, Yan-gui 1; Liu, Jie 2; Zhang, Bing-chang 3; Zhao, Hong-mei 4; Huang, Gang 1
通讯作者	Huang, Gang
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	719
英文摘要	Biocrusts are common biotic components in diyland ecosystems worldwide, they contain diverse soil organisms and effectively enhance soil stability and perform a series of key ecological functions. However, the geographical pattern of microbial communities in biocrusts is rarely assessed, despite it is closely related to the spatial variation of ecosystem functions in drylands. We assessed soil bacterial communities in biocrusts across four ecosystems (Gobi, desert, desert steppe and grassland) in a precipitation gradient (16-566 mm yr(-1)) in northern China. Bacterial OTU number and phylogenetic diversity did not linearly increase with decreasing aridity, they were significantly lower in Gobi and similar among desert, desert steppe and grassland. Soil bacterial community composition in Gobi and desert were different than those in desert steppe and grassland, and they were similar between Gobi and desert, this suggests the key role of habitat in structuring soil bacterial communities. The geographic pattern of soil bacterial communities was strongly influenced by both geographic distance and environmental factors. The first explanatory factor for the geographic variation of bacterial community dissimilarity differed among four ecosystems, being aridity in Gobi and desert, precipitation in desert steppe, and soil inorganic nitrogen in grassland. The geographic pattern of the bacterial functional group profile showed a similar pattern with community composition across four ecosystems, and the groups of containing mobile elements and gram negative bacteria were more abundant in drier habitats of Gobi and desert. Our results reveal the non-linear changes in diversity, composition and functional group of soil bacterial communities in biocrusts across the precipitation gradient from hyper-arid to semi-humid regions, and suggest that the geographic distance and habitat-specific environmental factors determine the distribution of soil bacterial communities in different ecosystems. (C) 2020 Elsevier B.V. All rights reserved.
英文关键词	Aridity index Bacterial community Biocrusts Desert Precipitation
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000521936300066
WOS关键词	COLORADO NATIONAL MONUMENT ; MICROBIAL BIOMASS ; GURBANTUNGGUT DESERT ; SUCCESSIONAL STAGES ; EXTRACTION METHOD ; CRUSTS ; DIVERSITY ; PATTERNS ; PRECIPITATION ; CYANOBACTERIA
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319285
作者单位	1.Fujian Normal Univ, Inst Geog Sci, 8 Shangshan Rd, Fuzhou 350007, Fujian, Peoples R China; 2.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Biogeog & Bioresouire Arid Land, South Beijing Rd 818, Urumqi 830011, Xinjiang, Peoples R China; 3.Shanxi Normal Univ, Coll Geog Sci, Gongyuan St 1, Linfeng 041000, Shanxi, Peoples R China; 4.Xinjiang Agr Univ, Coll Grassland & Environm Sci, Nongdong Rd 311, Urumqi 830052, Xinjiang, Peoples R China
推荐引用方式 GB/T 7714	Su, Yan-gui,Liu, Jie,Zhang, Bing-chang,et al. Habitat-specific environmental factors regulate spatial variability of soil bacterial communities in biocrusts across northern China's drylands[J]. 中国科学院新疆生态与地理研究所,2020,719.
APA	Su, Yan-gui,Liu, Jie,Zhang, Bing-chang,Zhao, Hong-mei,&Huang, Gang.(2020).Habitat-specific environmental factors regulate spatial variability of soil bacterial communities in biocrusts across northern China's drylands.SCIENCE OF THE TOTAL ENVIRONMENT,719.
MLA	Su, Yan-gui,et al."Habitat-specific environmental factors regulate spatial variability of soil bacterial communities in biocrusts across northern China's drylands".SCIENCE OF THE TOTAL ENVIRONMENT 719(2020).