| 古尔班通古特沙漠植被与环境关系分析 |
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| 引用本文： | 钱亦兵,吴兆宁,赵锐锋,张立运.古尔班通古特沙漠植被与环境关系分析[J].地理学报(英文版),2008,18(4):400-414. |
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| 作者姓名： | 钱亦兵 吴兆宁 赵锐锋 张立运 |
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| 作者单位： | 钱亦兵,张立运,QIAN Yibing,ZHANG Liyun(Xinjiang Institute of Ecology and Geography, CAS, Urumq1830011, China);吴兆宁,WU Zhaoning(College of Resources and Environment Sciences, Xinjiang University, Urumqi, 830046, China);赵锐锋,ZHAO Ruifeng(Xinjiang Institute of Ecology and Geography, CAS, Urumq1830011, China;Graduate School of Chinese Academy of Sciences, Beijing 100039, China) |
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| 基金项目： | Fund from the Forestry Bureau of Fukang City; The Director＇s Fund of the Xinjiang Institute of Ecology and Geology, CAS
Acknowledgments＂ We are grateful to Mr. Jiang Jin and Dr. Tang Lisong for assistance in the field work, and to Ms Tang Zihua for soil grain-size analysis, and also thank Mr. Adrian Williams for his work on the English text. |
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| 摘 要： | The Gurbantunggut Desert is the largest stable and semi-stable sand desert in China, yet few data exist on vegetation pattern and species-environment relationships for these diverse desert landscapes. The sand dunes of the survey area are mainly of the longi- tudinal form from north to south, but checkerboard-shaped and honeycomb-shaped forms are also present, with the height of 10-50 m. We measured vegetation and soil data on north-south transects and compared them with vegetation and soil data on east-west transects. Analysis revealed that the varying trend and strength of the species diversity, dominance and cover of the plant communities in the longitudinal and transverse directions across the landscape are significantly different. The results of CCA ordination show that the microhabitats of soil organic matter （OM）, soil salts （TS）, sorting index （ σ ）, topsoil water-content （SM） and pH relate to the differences in vegetation observed as differences in species assemblage from salt-intolerant ephemerals, micro-subshrubs and subshrubs to salt-tolerant shrubs and micro-arbors. The terrain （alt.） and soil texture （the contents of Mz and Ф 1） affect the spatial differentiation of many species. However, this spatial differentiation is not so marked on transects running longitudinally with the landscape, in the same direction as the dunes. The species of the desert vegetation have formed three assemblages under the action of habitat gradients, relating to three sections running transversely across the landscape, at right angles to the direction of the dune crests. In the mid-east section of the study area the topography is higher, with sand-lands or dune-slopes with coarse particles. Here the dominant vegetation comprises shrubs and subshrubs of Seriphidium santofium and Ephedra distachya, with large numbers of ephemeral and ephemeroid plants of Senecio subdentatus, and Carex physodes in spring and summer. On the soil of the dune-slopes in the mid-west of the study area, with coarse partic
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| 关 键 词： | 古尔班通古特沙漠 植被 环境关系 环境气候 |
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