干旱区生态环境知识资源中心(Arid): Coupling of soil carbon and nitrogen dynamics in drylands under climate change

Arid

DOI	10.1016/j.catena.2022.106735
	Coupling of soil carbon and nitrogen dynamics in drylands under climate change
	Han, Yaowen; Jia, Yufu; Wang, Guoan; Tan, Qiqi; Liu, Xuejun; Chen, Chongjuan
通讯作者	Wang, GA
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2023
卷号	221
英文摘要	Climate change is predicted to be more dramatic in arid regions. Soil carbon (C) and nitrogen (N) dynamics maintain various functions in terrestrial ecosystems. It has been suggested that soil C and N dynamics are bio-logically coupled due to the strict proportions of C and N in organisms. However, whether dramatic climate change in drylands would break this coupling remained largely unknown. Given that climate change could occur over short distances in mountainous terrain, this study conducted a soil sampling across an altitude transect in Tianshan Mountains, China, which are the largest mountain system in drylands across the world. To avoid the disturbance of the influence of slope aspect, we therefore collected soil samples on the sunny and shady slopes of Tianshan Mountains. Our results showed that soil C and N concentrations and C:N ratio all increased with increasing altitude on the sunny slope and their changes were affected by temperature, soil sand content and precipitation. For the shady slope, soil C and N concentrations and C:N ratio all first increased then decreased along the altitude gradient. Soil pH, precipitation, temperature and soil sand content influenced soil C and N dynamics at altitude below 2650 m; soil pH and soil sand content affected soil C and N dynamics at altitude above 2650 m. These results indicated that soil C and N dynamics on the sunny and shady slopes both kept coupled under the condition of changing altitude. Furthermore, although the altitudinal patterns of soil C and N dynamics on the sunny and shady slopes were different, the correlations between soil C and N concentrations on these two slopes both were significant with a correlation coefficient of about 0.9. Hence, this study suggested that the coupling of soil C and N dynamics in drylands would still exist under climate change.
英文关键词	Global change Altitude Temperature Precipitation Soil stoichiometry
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000891889900001
WOS关键词	ORGANIC-CARBON ; NUTRIENT CONCENTRATIONS ; TERRESTRIAL ECOSYSTEMS ; BIOGEOCHEMICAL CYCLES ; STOICHIOMETRY ; RESPONSES ; SEQUESTRATION ; DEPOSITION ; SLOPE ; WATER
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395658
推荐引用方式 GB/T 7714	Han, Yaowen,Jia, Yufu,Wang, Guoan,et al. Coupling of soil carbon and nitrogen dynamics in drylands under climate change[J],2023,221.
APA	Han, Yaowen,Jia, Yufu,Wang, Guoan,Tan, Qiqi,Liu, Xuejun,&Chen, Chongjuan.(2023).Coupling of soil carbon and nitrogen dynamics in drylands under climate change.CATENA,221.
MLA	Han, Yaowen,et al."Coupling of soil carbon and nitrogen dynamics in drylands under climate change".CATENA 221(2023).