Arid
DOI10.1016/j.catena.2019.104366
Opposite patterns of soil organic and inorganic carbon along a climate gradient in the alpine steppe of northern Tibetan Plateau
Du, Chenjun; Gao, Yongheng
通讯作者Gao, Yongheng
来源期刊CATENA
ISSN0341-8162
EISSN1872-6887
出版年2020
卷号186
英文摘要Both soil organic carbon (SOC) and inorganic carbon (SIC) are important components of soil carbon storage. However, few studies have attempted to estimate the magnitude and patterns of SIC in arid areas. We measured the concentrations of SOC and SIC in alpine steppe grasslands along a climate gradient in the Tibetan Plateau. At all sites, an opposing trend was found in the distribution of SOC compared with SIC. SOC increased with increasing precipitation, while SIC decreased. Within sites, SOC decreased with soil depth, while SIC increased. Among the variables considered, soil total nitrogen (TN) and soil water content explained the most variability in SOC (r(2) = 0.95 for TN, r(2) = 0.93 for soil water content), and soil pH had the highest correlation with SIC (r(2) = 0.90). This finding indicates that SOC is closely related to biological processes, such as biomass input and litter accumulation, while SIC is determined by abiotic factors such as chemical and physical processes of soil formation. SOC and SIC densities showed that the SOC pool comprised 91% of total carbon (TC) storage in these alpine steppe soils. A decrease in SOC density occurred with depth, but this pattern was the opposite for SIC density in all soil profiles. These findings help to characterize the C cycle in the alpine steppe of the Tibetan Plateau.
英文关键词Arid regions Climate change Vertical distribution Soil carbon content C dynamics
类型Article
语种英语
国家Peoples R China
开放获取类型Bronze
收录类别SCI-E
WOS记录号WOS:000509817000006
WOS关键词BELOW-GROUND BIOMASS ; PRECIPITATION GRADIENT ; GRAZING EXCLUSION ; CHINA GRASSLANDS ; DYNAMICS ; NITROGEN ; STORAGE ; TOPSOIL ; MANAGEMENT ; ECOSYSTEM
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/2XILL650/314221
作者单位(1)Chinese Acad Sci, Chengdu Inst Biol, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliz, Chengdu 610041, Peoples R China;(2)Chinese Acad Sci, Chengdu Inst Biol, Ecol Restorat & Biodivers Conservat Key Lab Sichu, Chengdu 610041, Peoples R China;(3)Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
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Du, Chenjun,Gao, Yongheng. Opposite patterns of soil organic and inorganic carbon along a climate gradient in the alpine steppe of northern Tibetan Plateau[J],2020,186.
APA Du, Chenjun,&Gao, Yongheng.(2020).Opposite patterns of soil organic and inorganic carbon along a climate gradient in the alpine steppe of northern Tibetan Plateau.CATENA,186.
MLA Du, Chenjun,et al."Opposite patterns of soil organic and inorganic carbon along a climate gradient in the alpine steppe of northern Tibetan Plateau".CATENA 186(2020).
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