Distribution and controlling factors of soil organic carbon storage in the northeast Tibetan shrublands

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; Peng, Yunfeng 3; Li, Fan 4; Yang, Lucun 1; Xiong, Feng 1,2; Li, Changbin 1,2; Zhou, Guoying 1
	2019
发表期刊	JOURNAL OF SOILS AND SEDIMENTS
ISSN	1439-0108
卷号	19 期号:1 页码:322-331
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.
关键词	Climatic factors Shrublands Tibetan Plateau Soil organic carbon Soil pH
学科领域	Environmental Sciences ; Soil Science
DOI	10.1007/s11368-018-2037-9
收录类别	SCI
语种	英语
WOS关键词	SPATIAL-DISTRIBUTION ; BIOTIC CONTROLS ; LAND-USE ; CLIMATE ; PH ; SEQUESTRATION ; DECOMPOSITION ; PATTERNS ; PRECIPITATION ; TEMPERATURE
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
WOS记录号	WOS:000456207800030
出版者	SPRINGER HEIDELBERG
文献子类	Article
出版地	HEIDELBERG
EISSN	1614-7480
资助机构	National Science and Technology Support Project [2014BAC05B01] ; National Basic Research Program of ChinaNational Basic Research Program of China [2015FY11030001-5] ; Strategic Priority Research Program of CAS [XDA0505030304] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [40801076]
作者邮箱	zhougy@nwipb.cas.cn
引用统计	被引频次：19[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/19749
专题	植被与环境变化国家重点实验室
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]. JOURNAL OF SOILS AND SEDIMENTS,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.

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