鄂尔多斯植被盖度分布与环境因素的关系

doi:10.3773/j.issn.1005-264x.2009.01.003

摘要/Abstract

摘要：

从植被指数分布与气象因素、地质地层和地质水文的关系入手, 利用遥感解译和地理信息系统的空间分析功能, 分析了不同尺度下, 气候因素、地质水文因素、基质和地貌等对鄂尔多斯高原植被盖度分布的影响。指出: 在区域尺度上, 研究区植被盖度分布主要受降水影响, 植被盖度呈从东南到西北逐渐减少的趋势; 高盖度植被主要分布在冲洪积地貌和丘陵地貌区。局部分析, 库布齐沙漠东向延伸的存在与发展与区域型断层的存在有密切的联系; 毛乌素沙地中的高盖度植被分布受地形和基质岩性组合的综合影响, 主要分布在第四系湖积物和第四系冲积物等渗水性差的基质上, 尤其集中分布于凹陷的湖相沉积。

关键词: 鄂尔多斯, 植被分布, 毛乌素, 沙漠化, 遥感

Abstract:

Aims Vegetation distributions are determined by diverse environmental conditions at different spatial scales. Our aim is to analyze the relationship between environmental factors and vegetation cover at different spatial scales.
Methods We obtained the distribution of NDVI in the Ordos Basin by mapping the remote sensing data (landsat5 TM). Using GIS software, we built a geo-database in the form of a thematic map and carried out spatial analysis to detect the relationship between the environment factors and NDVI at different spatial scales.
Important findings At the scale of the Ordos region, mean annual rainfall plays an important role in vegetation distribution and high-cover vegetation mainly occurs in geomorphology regions of diluvial and alluvial deposits. At the scale of the Kubuqi Desert, geohydrologic condition is one of the important factors contributing to the distribution of vegetation cover. In Mu-Us, the lithology of sublayer terrain greatly affects vegetation cover and distribution.

Key words: Ordos, Mu-Us, NDVI, vegetation distribution, vegetation cover

房世波, 谭凯炎, 刘建栋, 张新时, 董鸣. 鄂尔多斯植被盖度分布与环境因素的关系. 植物生态学报, 2009, 33(1): 25-33. DOI: 10.3773/j.issn.1005-264x.2009.01.003

FANG Shi-Bo, TAN Kai-Yan, LIU Jian-Dong, ZHANG Xin-Shi, DONG Ming. VEGETATION COVER AND ITS RELATIONSHIP WITH ENVIRONMENTAL FACTORS AT DIFFERENT SCALES IN THE ORDOS REGION OF CHINA. Chinese Journal of Plant Ecology, 2009, 33(1): 25-33. DOI: 10.3773/j.issn.1005-264x.2009.01.003

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链接本文: https://www.plant-ecology.com/CN/10.3773/j.issn.1005-264x.2009.01.003

https://www.plant-ecology.com/CN/Y2009/V33/I1/25

图/表 5

图1 NDVI与年均降雨量

Fig. 1 NDVI and annual average rainfall

图2 各级NDVI面积百分比分布与地貌类型的关系

Fig. 2 Percentage of area of each NDVI range in different landforms

图3 鄂尔多斯北部库布齐沙地细部(TM741假彩色合成)

Fig. 3 Enlarge image of remote sensing image in Kubuqi desert

图4 主要植被覆盖分布占各个地层基质的面积百分比

Fig. 4 Percentage of vegetation coverage in different stratums

图5 地质地貌组合与植被的关系

Fig. 5 Relationship between vegetation cover and landform bedrocks

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