干旱区生态环境知识资源中心(Arid): Distribution and controlling factors of soil organic carbon storage in the northeast Tibetan shrublands

Arid

DOI	10.1007/s11368-018-2037-9
	Distribution and controlling factors of soil organic carbon storage in the northeast Tibetan shrublands
	Nie, Xiuqing 1,2,3; Peng, Yunfeng 4; Li, Fan 5; Yang, Lucun 1,2; Xiong, Feng 1,2,3; Li, Changbin 1,2,3; Zhou, Guoying 1,2
通讯作者	Zhou, Guoying
来源期刊	JOURNAL OF SOILS AND SEDIMENTS
ISSN	1439-0108
EISSN	1614-7480
出版年	2019
卷号	19 期号:1 页码:322-331
英文摘要	PurposeAlthough large amounts of soil organic carbon (SOC) stored in the shrublands, information about SOC storage was little on the Tibetan Plateau. This study aims to evaluate the spatial patterns and storage of SOC in the shrublands and the relationships of climatic variables and soil pH on the Tibetan Plateau.Materials and methodsWe used 177 profiles of soil samples obtained from 59 shrubland sites on the northeast Tibetan Plateau from 2011 to 2013. Ordinary least squares regressions, curve estimation, and multiple linear regressions were used to evaluate controlling factors on SOC stock. Kriging interpolation was used to upscale sit-level measurements to the whole study area.Results and discussionWe found that SOC storage in the northeast Tibetan shrublands was 1.36Pg C in the top 1m with an average SOC stock of 12.38kgm(-2). SOC stock decreased from east to west and south to north but generally increased significantly with the mean annual temperature (MAT) and the mean annual precipitation (MAP), and tended to decrease with soil pH. Although similar relationships were also observed in alpine shrublands, the trends among SOC stock, MAP, and MAT were not observed in desert shrublands. Our results indicate that a reduction in soil pH accelerates the C sequestration potential. Furthermore, global warming contributed to C sequestration in alpine shrublands, specifically, SOC stock increased 8.44kgm(-2) with an increased unit of MAT in alpine shrublands just considering temperature effects. Meanwhile, the C sequestration was different among different regions due to the uneven increases in precipitation. However, in desert shrublands, MAP and MAT did not significantly affect SOC stock.ConclusionsThe results indicate that though a reduction in soil pH could contribute to C sequestration, MAT and MAP have different effects on SOC stock in different Tibetan Plateau shrublands. Increased MAT and MAP were 0.05 degrees C and 1.67mm every year on the Tibetan Plateau, which will increase C sequestration in alpine shrublands, but might have limited impacts on desert shrublands, which help us comprehend soil C cycling in the global climate change scenario.
英文关键词	Climatic factors Shrublands Tibetan Plateau Soil organic carbon Soil pH
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000456207800030
WOS关键词	SPATIAL-DISTRIBUTION ; BIOTIC CONTROLS ; LAND-USE ; CLIMATE ; PH ; SEQUESTRATION ; DECOMPOSITION ; PATTERNS ; PRECIPITATION ; TEMPERATURE
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
来源机构	中国科学院植物研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217322
作者单位	1.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Tibetan Med Res, Xining 810008, Qinghai, Peoples R China; 2.Qinghai Key Lab Qing Tibet Biol Resources, Xining 810008, Qinghai, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China; 5.Inst Qinghai Meteorol Sci Res, Xining 810008, Qinghai, Peoples R China
推荐引用方式 GB/T 7714	Nie, Xiuqing,Peng, Yunfeng,Li, Fan,et al. Distribution and controlling factors of soil organic carbon storage in the northeast Tibetan shrublands[J]. 中国科学院植物研究所,2019,19(1):322-331.
APA	Nie, Xiuqing.,Peng, Yunfeng.,Li, Fan.,Yang, Lucun.,Xiong, Feng.,...&Zhou, Guoying.(2019).Distribution and controlling factors of soil organic carbon storage in the northeast Tibetan shrublands.JOURNAL OF SOILS AND SEDIMENTS,19(1),322-331.
MLA	Nie, Xiuqing,et al."Distribution and controlling factors of soil organic carbon storage in the northeast Tibetan shrublands".JOURNAL OF SOILS AND SEDIMENTS 19.1(2019):322-331.