中文摘要：

在遥感和GIS技术的支持下，通过采用转换矩阵和斑块伸长指数、破碎度指数、多样性指数、优势度指数、均匀度指数等景观指数分析了80年代末期到2000年浑善达克沙地景观动态变化，结果显示：①景观要素类型尺度上，研究区草原景观和固定沙丘景观面积明显缩小，半固定沙丘景观和流动沙地景观向外扩展，反映出整个沙地向荒漠化方向发展的趋势；②景观尺度上，斑块伸长指数有所下降，破碎度变大，反映出人类活动对景观的干预作用不断增强；景观多样性指数和均匀度指数减小，优势度指数增加，表明景观的组成趋向简单，主要景观对区域景观变化起到主导作用，景观中的支配能力和影响力在增强。

英文摘要：

In this paper, TM images from late 1980s to 2000 were used as data sources to get attributive and distributive data base by using RS and GIS information technology. The landscape structure and its dynamic changes were analyzed with the fundamental theories and methods of landscape ecology. Results showed the areas of grasslands and immobile dunes is obviously decreased, the areas of semi-immobile dunes and mobile dunes increased. It was reflected that the whole landscape developed forward to desertification. Length index of patches decreased and the break-up of landscape enlarged. It was showed that the influence of human activities on landscape would continuously strengthen.