干旱区生态环境知识资源中心(Arid): The steps in the soil nitrogen transformation process vary along an aridity gradient via changes in the microbial community

Arid

DOI	10.1007/s10533-019-00569-2
	The steps in the soil nitrogen transformation process vary along an aridity gradient via changes in the microbial community
	Tatsumi, Chikae 1; Taniguchi, Takeshi 2; Du, Sheng 3; Yamanaka, Norikazu 2; Tateno, Ryunosuke 4
通讯作者	Tatsumi, Chikae
来源期刊	BIOGEOCHEMISTRY
ISSN	0168-2563
EISSN	1573-515X
出版年	2019
卷号	144 期号:1 页码:15-29
英文摘要	Rainfall patterns are predicted to change dramatically in many terrestrial landscapes, including drylands. The most limiting resources for plant growth in arid regions is nitrogen (N) as well as water. A natural aridity gradient provides appropriate candidate conditions for predicting the impacts of changes in rainfall on soil N dynamics. To comprehensively and mechanistically examine soil N dynamics, we focused on the steps of N transformation, their microbial drivers, and the determining soil properties. We divided the N transformation process into three steps: (i) organic matter degradation, (ii) N mineralization, and (iii) nitrification, which are driven primarily by fungi, prokaryotes, and ammonia oxidizers, respectively. Soil samples were collected from three black locust forests with mean annual precipitations ranging from 449 to 606mm. Along the aridity gradient, all three steps changed while maintaining a balance. The degradation and mineralization steps varied with changes in the soil fungal and prokaryotic communities, respectively. The compositions of these communities were determined by soil substrate quality and quantity; saprotrophs and copiotrophs decreased along the aridity gradient. On the other hand, the abundance of ammonia-oxidizing bacteria, which correlated with the rate of nitrification, was likely determined by soil moisture. Therefore, if precipitation were to decrease, changes in the nitrification step might be the first mechanism to limit plant productivity in semi-arid forests. This limitation would extend to the other steps in the N cycling process via plant-soil feedback. Thus, N cycling dynamics are predicted to achieve new stable states suited to the changed precipitation regime.
英文关键词	Dryland Forest Rainfall gradient Saprotroph Copiotroph Nitrogen mineralization Nitrification
类型	Article
语种	英语
国家	Japan ; Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000470700200002
WOS关键词	AMMONIA-OXIDIZING BACTERIA ; NET PRIMARY PRODUCTION ; PRECIPITATION GRADIENT ; FUNGAL COMMUNITIES ; ORGANIC NITROGEN ; PLANT-GROWTH ; CARBON ; FOREST ; MINERALIZATION ; RESPONSES
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214602
作者单位	1.Kyoto Univ, Grad Sch Agr, Sakyo Ku, Kyoto 6068502, Japan; 2.Tottori Univ, Arid Land Res Ctr, 1390 Hamasaka, Tottori 6800001, Japan; 3.Chinese Acad Sci, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China; 4.Kyoto Univ, Field Sci Educ & Res Ctr, Kyoto 6068502, Japan
推荐引用方式 GB/T 7714	Tatsumi, Chikae,Taniguchi, Takeshi,Du, Sheng,et al. The steps in the soil nitrogen transformation process vary along an aridity gradient via changes in the microbial community[J]. 西北农林科技大学,2019,144(1):15-29.
APA	Tatsumi, Chikae,Taniguchi, Takeshi,Du, Sheng,Yamanaka, Norikazu,&Tateno, Ryunosuke.(2019).The steps in the soil nitrogen transformation process vary along an aridity gradient via changes in the microbial community.BIOGEOCHEMISTRY,144(1),15-29.
MLA	Tatsumi, Chikae,et al."The steps in the soil nitrogen transformation process vary along an aridity gradient via changes in the microbial community".BIOGEOCHEMISTRY 144.1(2019):15-29.