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Impacts of permafrost changes on alpine ecosystem in Qinghai-Tibet Plateau
文献类型：期刊论文
| 作者 | Wang Genxu1,3 ; Li Yuanshou2; Wu Qingbai2; Wang Yibo3
|
| 刊名 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| 出版日期 | 2006-11-01 |
| 卷号 | 49期号:11页码:1156-1169 |
| 关键词 | permafrost environment alpine cold ecosystem statistics relationship climate change impacts Qinghai-Tibet Plateau |
| ISSN号 | 1006-9313 |
| 通讯作者 | Wang Genxu |
| 英文摘要 | Alpine cold ecosystem with permafrost environment is quite sensitive to climatic changes and the changes in permafrost can significantly affect the alpine ecosystem. The vegetation coverage, grassland biomass and soil nutrient and texture are selected to indicate the regime of alpine cold ecosystems in the Qinghai-Tibet Plateau. The interactions between alpine ecosystem and permafrost were investigated with the depth of active layer, permafrost thickness and mean annual ground temperature (MAGTs). Based on the statistics model of GPTR for MAGTs and annual air temperatures, an analysis method was developed to analyze the impacts of permafrost changes on the alpine ecosystems. Under the climate change and human engineering activities, the permafrost change and its impacts on alpine ecosystems in the permafrost region between the Kunlun Mountains and the Tanggula Range of Qinghai-Tibet Plateau are studied in this paper. The results showed that the permafrost changes have a different influence on different alpine ecosystems. With the increase in the thickness of active layer, the vegetation cover and biomass of the alpine cold meadow exhibit a significant conic reduction, the soil organic matter content of the alpine cold meadow ecosystem shows an exponential decrease, and the surface soil materials become coarse and gravelly. The alpine cold steppe ecosystem, however, seems to have a relatively weak relation to the permafrost environment. Those relationships resulted in the fact that the distribution area of alpine cold meadow decreased by 7.98% and alpine cold swamp decreased by 28.11% under the permafrost environment degradation during recent 15 years. In the future 50 years the alpine cold meadow ecosystems in different geomorphologic units may have different responses to the changes of the permafrost under different climate warming conditions, among them the alpine cold meadow and swamp ecosystem located in the low mountain and plateau area will have a relatively serious degradation. Furthermore, from the angles of grassland coverage and biological production the variation characteristics of high-cold ecosystems in different representative regions and different geomorphologic units under different climatic conditions were quantitatively assessed. In the future, adopting effective measures to protect permafrost is of vital importance to maintaining the stability of permafrost engineering and alpine cold ecosystems in the plateau. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Geosciences, Multidisciplinary |
| 研究领域[WOS] | Geology |
| 关键词[WOS] | VEGETATION ; HIGHWAY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000242923300004 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/10512]  |
| 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.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 3.Lanzhou Univ, Resource & Environm Sch, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang Genxu,Li Yuanshou,Wu Qingbai,et al. Impacts of permafrost changes on alpine ecosystem in Qinghai-Tibet Plateau[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2006,49(11):1156-1169. |
| APA | Wang Genxu,Li Yuanshou,Wu Qingbai,&Wang Yibo.(2006).Impacts of permafrost changes on alpine ecosystem in Qinghai-Tibet Plateau.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,49(11),1156-1169. |
| MLA | Wang Genxu,et al."Impacts of permafrost changes on alpine ecosystem in Qinghai-Tibet Plateau".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 49.11(2006):1156-1169. |
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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