干旱区生态环境知识资源中心(Arid): Contrast diversity patterns and processes of microbial community assembly in a river-lake continuum across a catchment scale in northwestern China

Arid

DOI	10.1186/s40793-020-00356-9
	Contrast diversity patterns and processes of microbial community assembly in a river-lake continuum across a catchment scale in northwestern China
	Tang, Xiangming 1,2; Xie, Guijuan 1,2; Shao, Keqiang 1,2; Hu, Yang 1,2; Cai, Jian 1,2; Bai, Chengrong 1,2; Gong, Yi 1; Gao, Guang 1,2
通讯作者	Tang, Xiangming
来源期刊	ENVIRONMENTAL MICROBIOME
EISSN	2524-6372
出版年	2020
卷号	15 期号:1
英文摘要	Background Microorganisms in rivers and lakes are essential for nutrient recycling in aquatic ecosystems. Understanding the ecological processes shaping microbial communities is of crucial importance for aquatic microbial ecology and biogeography. However, the diversity of microorganisms and the forces that control this diversity are poorly understood. This is particularly true within the framework of the river-lake continuum in arid regions. Results Using a whole catchment-sampling effort, we explored biogeographical patterns and mechanisms of microbial community (bacteria and archaea) assembly within the catchment of the largest inland once freshwater lake (Lake Bosten) in China. Water samples from headstream tributaries, the mainstream of the River Kaidu to downstream Lake Bosten were characterized using amplicon sequencing of 16S rRNA genes. Higher alpha-diversity was found in mainstream of River Kaidu and in the tributaries compared with Lake Bosten. And the microbial community composition was also significantly different between the lake and its connected river habitats. Canonical correspondence analysis demonstrated that salinity and total suspended solids were the most important environmental factors shaping the community variations. Overall, pure environmental and pure spatial factors explained 13.7 and 5.6% of the community variation, respectively, while 32.0% of the variation was explained by combined environmental and spatial variables. These observations suggested that spatially structured environmental variations mainly shaped the microbial biogeography in this region. Both deterministic and stochastic processes influenced the microbial community assembly in river and lake habitats, and the stochastic pattern was particularly pronounced for microbiome in river habitat. Co-occurrence network analysis revealed more abundant and complicated correlations among frequently occurred taxa in lake habitat compared with the river habitat, implying that ecological multispecies interactions (e.g., competition) shaped lake microbial community structures. Conclusions Our findings demonstrate an ecological succession along the river-lake continuum of microbial communities across the largest inland once freshwater lake basin in China, and highlight the effects of spatially structured environmental factors on regional microbial beta-diversity and species interactions on local community assembly.
英文关键词	Microbial community assembly Species and functional diversity Deterministic and stochastic processes Salinity Biotic interactions Lake Bosten
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000530314800001
WOS关键词	SPECIES ABUNDANCE DISTRIBUTIONS ; OLIGOSALINE LAKE ; NEUTRAL-THEORY ; BIOGEOGRAPHY ; STREAM ; COOCCURRENCE ; GENERATION ; SALINITY ; BOSTEN
WOS类目	Genetics & Heredity ; Microbiology
WOS研究方向	Genetics & Heredity ; Microbiology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318983
作者单位	1.Chinese Acad Sci, Nanjing Inst Geog & Limnol, Taihu Lab Lake Ecosyst Res, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Tang, Xiangming,Xie, Guijuan,Shao, Keqiang,et al. Contrast diversity patterns and processes of microbial community assembly in a river-lake continuum across a catchment scale in northwestern China[J],2020,15(1).
APA	Tang, Xiangming.,Xie, Guijuan.,Shao, Keqiang.,Hu, Yang.,Cai, Jian.,...&Gao, Guang.(2020).Contrast diversity patterns and processes of microbial community assembly in a river-lake continuum across a catchment scale in northwestern China.ENVIRONMENTAL MICROBIOME,15(1).
MLA	Tang, Xiangming,et al."Contrast diversity patterns and processes of microbial community assembly in a river-lake continuum across a catchment scale in northwestern China".ENVIRONMENTAL MICROBIOME 15.1(2020).