干旱区生态环境知识资源中心(Arid): Responses of soil bacterial communities to precipitation change in the semi-arid alpine grassland of Northern Tibet

Arid

DOI	10.3389/fpls.2022.1036369
	Responses of soil bacterial communities to precipitation change in the semi-arid alpine grassland of Northern Tibet
	Li, Xueqin; Yan, Yan; Lu, Xuyang; Fu, Lijiao; Liu, Yanling
通讯作者	Yan, Y ; Lu, XY
来源期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
出版年	2022
卷号	13
英文摘要	A change in precipitation can profoundly change the structure of soil microbial communities, especially in arid and semi-arid areas which are limited by moisture conditions. Therefore, it is crucial to explore how soil bacterial community composition and diversity will respond to variation in precipitation. Here we conducted a precipitation control experiment to simulate precipitation change by reducing and increasing rainfall by 25%, 50%, and 75% in the alpine grasslands of northern Tibet. The composition, diversity, and species interaction network of soil microbial community were studied by high-throughput sequencing, and the relationship between microbial community species and soil environmental factors was analyzed. Our results showed that Proteobacteria (45%-52%) and Actinobacteria (37%-45%) were the dominant bacteria in the soil. The alpha diversity index based on Shannon, Chao1, and Simpson indices revealed that precipitation change had no significant effect on richness and evenness of soil microbial communities. Non-metric multidimensional scaling (NMDS) and analysis of similarities (ANOSIM) showed that a clear separation of soil microbial communities between D2(-50%),D3(-75%) and W2(+50%), W3(+75%) treatments. The microbial interaction network indicated that the water-increasing treatment group had closer connections, and Proteobacteria and Actinomycetes were the core species. Furthermore, there was a stronger positive correlation between species in the water-reducing treatment group, the contribution of Proteobacteria decreased significantly, the role of connecting hub decreased, and Actinomycetes became the most important core microbial species. In addition, soil water content (SWC) and available phosphorus (AP) were closely related to the variations in soil microbial compositions. The findings of this study provide a theoretical basis for the driving mechanism of global climate change on soil microbial community and grassland ecosystem in alpine grassland.
英文关键词	Precipitation change Alpine grassland soil microbial community structure co-occurrence network
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000878270200001
WOS关键词	MICROBIAL COMMUNITY ; ALTERED PRECIPITATION ; COOCCURRENCE NETWORK ; CLIMATE-CHANGE ; DIVERSITY ; PLANT ; PATTERNS ; RAINFALL ; TEMPERATURE ; DROUGHT
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392811
推荐引用方式 GB/T 7714	Li, Xueqin,Yan, Yan,Lu, Xuyang,et al. Responses of soil bacterial communities to precipitation change in the semi-arid alpine grassland of Northern Tibet[J],2022,13.
APA	Li, Xueqin,Yan, Yan,Lu, Xuyang,Fu, Lijiao,&Liu, Yanling.(2022).Responses of soil bacterial communities to precipitation change in the semi-arid alpine grassland of Northern Tibet.FRONTIERS IN PLANT SCIENCE,13.
MLA	Li, Xueqin,et al."Responses of soil bacterial communities to precipitation change in the semi-arid alpine grassland of Northern Tibet".FRONTIERS IN PLANT SCIENCE 13(2022).