干旱区生态环境知识资源中心(Arid): Asymmetric responses of abundance and diversity of N-cycling genes to altered precipitation in arid grasslands

Arid

DOI	10.1111/1365-2435.14434
	Asymmetric responses of abundance and diversity of N-cycling genes to altered precipitation in arid grasslands
	Zhao, Mengying; Shen, Haihua; Zhu, Yankun; Xing, Aijun; Kang, Jie; Liu, Lingli; Fang, Jingyun
通讯作者	Shen, HH ; Fang, JY
来源期刊	FUNCTIONAL ECOLOGY
ISSN	0269-8463
EISSN	1365-2435
出版年	2023
卷号	37 期号:11 页码:2953-2966
英文摘要	Precipitation changes exert a fundamental effect on the nitrogen (N) cycle in water-limited grasslands. Soil microbes are essential drivers of N cycle, and the rates and their stabilities of interrelated N-cycling processes are reflected by the abundance and diversity of N-cycling genes. Yet, little is known about how altered precipitation affects the genes involved in the entire N-cycling pathways.By combining a 6-year precipitation manipulation experiment (-30%, ambient, +30%, +50%) with metagenomic sequencing, we investigated the responses of N-cycling gene abundance and diversity to altered precipitation at two soil depths (0-10 and 30-50 cm).We found that increased precipitation enhanced the abundance of numerous key genes, leading to an acceleration of N turnover, but decreased the diversity of ammonium assimilation genes. Decreased precipitation did not reduce abundance or diversity of N-cycling genes. Most N-cycling genes showed generally consistent responses to altered precipitation in the topsoil (0-10 cm) and subsoil (30-50 cm), albeit with clear distinctions in both abundance and diversity by soil depth. These precipitation-specific responses and depth-dependent variabilities of functional genes were attributed to the distinct taxonomic composition of each N-cycling gene. Furthermore, we quantified gross N transformation rates and found that they were well predicted by the abundance of most N-cycling genes (e.g. genes involved in ammonium assimilation and nitrification).Our study sheds new light on the soil N cycle under precipitation alterations from the perspective of individual gene abundance and diversity and shows that future increases in precipitation could accelerate soil N turnover in arid and semi-arid lands.Read the free Plain Language Summary for this article on the Journal blog. Read the free Plain Language Summary for this article on the Journal blog.image
英文关键词	abundance and diversity altered precipitation functional gene soil depth soil nitrogen cycle
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001068802400001
WOS关键词	MICROBIAL FUNCTIONAL GENES ; SOIL CARBON ; NITROGEN ; DENITRIFICATION ; NITRIFICATION ; VEGETATION ; MANIPULATION ; COMMUNITIES ; ECOSYSTEM ; PROFILES
WOS类目	Ecology
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/2XILL650/396658
推荐引用方式 GB/T 7714	Zhao, Mengying,Shen, Haihua,Zhu, Yankun,et al. Asymmetric responses of abundance and diversity of N-cycling genes to altered precipitation in arid grasslands[J],2023,37(11):2953-2966.
APA	Zhao, Mengying.,Shen, Haihua.,Zhu, Yankun.,Xing, Aijun.,Kang, Jie.,...&Fang, Jingyun.(2023).Asymmetric responses of abundance and diversity of N-cycling genes to altered precipitation in arid grasslands.FUNCTIONAL ECOLOGY,37(11),2953-2966.
MLA	Zhao, Mengying,et al."Asymmetric responses of abundance and diversity of N-cycling genes to altered precipitation in arid grasslands".FUNCTIONAL ECOLOGY 37.11(2023):2953-2966.