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Effects of permafrost thawing on vegetation and soil carbon pool losses on the Qinghai-Tibet Plateau, China
文献类型：期刊论文
| 作者 | Wang Genxu1,2 ; Li Yuanshou3; Wang Yibo2; Wu Qingbo3
|
| 刊名 | GEODERMA
 |
| 出版日期 | 2008-01-15 |
| 卷号 | 143期号:1-2页码:143-152 |
| 关键词 | soil organic carbon pool permafrost degradation alpine vegetative cover Qinghai-Tibet plateau |
| ISSN号 | 0016-7061 |
| 通讯作者 | Wang Genxu |
| 英文摘要 | 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. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Soil Science |
| 研究领域[WOS] | Agriculture |
| 关键词[WOS] | STORAGE ; DYNAMICS ; CLIMATE ; YELLOW ; FLUXES ; REGION ; FOREST ; ALASKA ; CYCLE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000252586200014 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/10535]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） 成都山地灾害与环境研究所_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 |
| 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. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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