多水平/尺度的驱动力变化与沙漠化之间的关系——以内蒙古乌审旗为例

doi:10.7522/j.issn.1000-694X.2013.00240

摘要/Abstract

摘要：

沙漠化是土地退化形式之一,它是自然因素和人类活动相互作用的结果。本文以内蒙古乌审旗为研究区,在多种空间数据基础上,基于等级理论,使用多水平统计模型构建了从局地到区域的模型,揭示不同尺度的影响因素与该地区沙漠化的关系。对遥感影像的分析表明该地区1977—2007年沙漠化扩展的趋势减缓并逆转;多水平统计模型分析表明,多尺度的驱动因素可以解释该地区近30年的沙漠化变化,特别是政策因素对该地区沙漠化逆转影响较大。本研究可为乌审旗及类似地区沙漠化变化机理研究提供参考。

关键词: 多水平统计模型, 尺度, 沙漠化, 土地利用政策, 乌审旗

Abstract:

Desertification, which is referred to land degradation in drylands, is often triggered by human activities and natural factors. To understand how land use changes and their drivers influence long-term land cover dynamics we used remote sensing data and multilevel statistical model to analyze spatio-temporal patterns of desertification in the Uxin Banner of Inner Mongolia, China. We found that desertification-induced land degradation expanded during the 1977-1987, but this process reversed during 1987-2007. Multilevel statistical modeling results suggest rural population density, the density of livestock, and accessibility to markets all have significant effects on desertification reversion at the local level, while changes in precipitation and land use policies are important at the region level. Particularly, were found land use policies were principal drivers of vegetation recovery. We therefore conclude that multilevel statistical model is effective and practical tool for understanding mechanisms of land degradation in Uxin Banner and other similar regions.

Key words: multilevel statistical model, scale, desertification, land use policy, Uxin Banner

中图分类号:

X144

张靖1,2, 牛建明1,3, 同丽嘎4, 张雪峰1. 多水平/尺度的驱动力变化与沙漠化之间的关系——以内蒙古乌审旗为例[J]. 中国沙漠, 2013, 33(6): 1643-1653.

ZHANG Jing1,2, NIU Jian-ming1,3, Tongliga4, ZHANG Xue-feng1. A Multilevel/Multiscale Analysis of the Impact of Land Use Drivers on Desertification: A case study of Uxin Banner, Inner Mongolia, China[J]. JOURNAL OF DESERT RESEARCH, 2013, 33(6): 1643-1653.

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