Effects of permafrost thawing on vegetation and soil carbon pool losses on the Qinghai-Tibet Plateau, China

doi:10.1016/j.geoderma.2007.10.023

IMHE OpenIR > 成都山地所知识仓储（2009年以前）

	Effects of permafrost thawing on vegetation and soil carbon pool losses on the Qinghai-Tibet Plateau, China
	Wang Genxu1,2 ; Li Yuanshou 3; Wang Yibo 2; Wu Qingbo 3
通讯作者	Wang Genxu
	2008
发表期刊	GEODERMA (IF:4.848[JCR-2019],5.181[5-Year])
ISSN	0016-7061
EISSN	1872-6259
卷号	143 期号:1-2 页码:143-152
文章类型	Article
摘要	Bearing a total organic carbon (TOC) content of 9.3-10.7 kg c/m(2), alpine grassland soils of the Qinghai-Tibet plateau's permafrost region bear a greater organic carbon pool than do grassland soils in other regions of China or than tropical savannah soils. The easily released light fraction organic carbon (LFOC) accounts for 34-54% of the TOC and is particularly enriched in the topsoil (0-0.10 in). The LFOC in the organic carbon pool of alpine cold meadow and alpine cold steppe soils decreased at exponential and quadratic rates, respectively, as the vegetative cover decreased. When the vegetative cover of alpine cold meadows decreased from > 80 dm(2)/m(2) to 60 dm(2)/m(2), the topsoil TOC and LFOC dropped by 20.4% and 38.4%, respectively. Similarly, when the vegetative cover of alpine cold meadow decreased from 50 dm(2)/m(2) to 30 dm(2)/m(2) and < 15 dm(2)/m(2), the topsoil LFOC content dropped by 60% and 86.7%, respectively. Under climatic warming, the degradation of permafrost and vegetation have resulted in serious soil organic carbon (SOC) loss from the carbon pool. Land cover changes that occurred between 1986 and 2000 are estimated to have resulted in a 1.8 Gg C (120 Mg C/yr) loss in SOC, and a concomitant 65% decrease in the LFOC, in the 0-0.30 in soil layer in the Qinghai-Tibet plateau's permafrost regions. Since the region's ecosystems are quite sensitive to global climate changes, if global warming persists, alpine cold grassland ecosystems are expected to further degrade. Hence, the influence of global climatic change on soil carbon emissions from alpine grasslands should receive more attention. (C) 2007 Elsevier B.V. All rights reserved.
关键词	Soil Organic Carbon Pool Permafrost Degradation Alpine Vegetative Cover Qinghai-tibet Plateau
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
DOI	10.1016/j.geoderma.2007.10.023
研究领域[WOS]	Agriculture
收录类别	SCI
关键词[WOS]	STORAGE ; DYNAMICS ; CLIMATE ; YELLOW ; FLUXES ; REGION ; FOREST ; ALASKA ; CYCLE
语种	英语
期刊分区	2区
TOP期刊	否
WOS类目	Soil Science
WOS记录号	WOS:000252586200014
引用统计	被引频次：147[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imde.ac.cn/handle/131551/10535
专题	成都山地所知识仓储（2009年以前）山地表生过程与生态调控重点实验室
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 2.Lanzhou Univ, Coll Resources & Environm, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
第一作者单位	中国科学院水利部成都山地灾害与环境研究所
推荐引用方式 GB/T 7714	Wang Genxu,Li Yuanshou,Wang Yibo,et al. Effects of permafrost thawing on vegetation and soil carbon pool losses on the Qinghai-Tibet Plateau, China[J]. GEODERMA,2008,143(1-2):143-152.
APA	Wang Genxu,Li Yuanshou,Wang Yibo,&Wu Qingbo.(2008).Effects of permafrost thawing on vegetation and soil carbon pool losses on the Qinghai-Tibet Plateau, China.GEODERMA,143(1-2),143-152.
MLA	Wang Genxu,et al."Effects of permafrost thawing on vegetation and soil carbon pool losses on the Qinghai-Tibet Plateau, China".GEODERMA 143.1-2(2008):143-152.

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