干旱区生态环境知识资源中心(Arid): Changes in soil prokaryotic communities and nitrogen cycling functions along a groundwater table drawdown gradient in desert wetlands

Arid

DOI	10.1016/j.scitotenv.2022.156868
	Changes in soil prokaryotic communities and nitrogen cycling functions along a groundwater table drawdown gradient in desert wetlands
	Wang, Kun; Pan, Ruopeng; Fei, Hongyan; Tong, Qian; Han, Fengpeng
通讯作者	Han, FP
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2022
卷号	842
英文摘要	Desert wetlands are evolving into deserts by groundwater table (GWT) drawdown. However, the changes in microbial communities and functions during the GWT drawdown are unclear, which hinders the predictive power of biogeo-chemical processes across the desertification. Here, 16S rRNA gene sequencing, PICRUSt2 and qPCR were used to in-vestigate soil prokaryotic diversity, composition and nitrogen cycling gene abundance at four vegetation types [flooded swamp (FS), drained swamp (DS), desert grassland (DG), and bare sandy land (BS)] along a GWT decline gra-dient in the Mu Us Desert, northern China. Results showed that prokaryotic Shannon and Chao1 indexes were signif-icantly reduced at BS than those at FS (p < 0.05). Whereas no significant difference was observed between FS, DS and DG (p > 0.05). Distinct shifts in community composition were found along the GWT decline gradient. The dominant taxa gradually changed from obligate anaerobes and eutrophic microbes to facultative anaerobes, and finally to aero-bic, oligotrophic and drought-tolerant microbes. Soil moisture was the most important factor in regulating the commu-nities. In addition, GWT drawdown inhibited the relative abundance of genes involved in nitrogen fixation, assimilatory nitrite reduction, and nitrate oxidation, but enhanced the relative abundance of genes related to denitri-fication, assimilated nitrate reduction, ammonia oxidation and ammonification. Thus, GWT drawdown inhibits nitro-gen input potential and exacerbates nitrogen loss potential. These results help in understanding the succession characteristics of desert wetland desertification.
英文关键词	Desertwetlands Desertification 16SrRNAgene Nitrogencyclinggenes
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000823233100017
WOS关键词	MICROBIAL COMMUNITIES ; USE EFFICIENCY ; DIVERSITY ; WATER ; FIXATION ; MOISTURE ; BIOGEOGRAPHY ; REDUCTION ; PEATLANDS ; SEDIMENT
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394391
推荐引用方式 GB/T 7714	Wang, Kun,Pan, Ruopeng,Fei, Hongyan,et al. Changes in soil prokaryotic communities and nitrogen cycling functions along a groundwater table drawdown gradient in desert wetlands[J],2022,842.
APA	Wang, Kun,Pan, Ruopeng,Fei, Hongyan,Tong, Qian,&Han, Fengpeng.(2022).Changes in soil prokaryotic communities and nitrogen cycling functions along a groundwater table drawdown gradient in desert wetlands.SCIENCE OF THE TOTAL ENVIRONMENT,842.
MLA	Wang, Kun,et al."Changes in soil prokaryotic communities and nitrogen cycling functions along a groundwater table drawdown gradient in desert wetlands".SCIENCE OF THE TOTAL ENVIRONMENT 842(2022).