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中文摘要：
以20世纪80年代航片、90年代SPOT和2007年ALOS遥感图像为主要数据源，利用景观生态学方法定量分析小尺度区域20世纪80年代初期至2007年间土地荒漠化及其变化状况。结果表明：（1）研究时段内，研究区土地荒漠化面积呈先增后减趋势，总荒漠化面积减少1246．5hm2，中度和轻度荒漠化土地面积分别增加2247．1hm2和1236．1hm2，严重荒漠化土地面积减少4729．7hm2，荒漠化主导类型由严重荒漠化转变为中度荒漠化，荒漠化程度有所减轻；（2）区域景观多样性和均匀性指数上升，轻度、中度荒漠化景观的边缘密度越来越高，边缘效应逐渐增大；（3）各荒漠化景观斑块数量呈增加趋势，斑块平均面积指数减小，景观破碎化程度明显增高，景观类型呈离散型分布；（4）研究区严重荒漠化景观形状趋于简单，轻度、中度荒漠化土地景观形状指数变得越来越低，斑块形状趋于复杂，易受周边景观和人类活动的影响。
英文摘要：
By using the interpretation results of remote sensing images of 1980s（aerial photo）, 1990s（spot）, and 2007（alos）, the dynamic changes of landscape pattern during the desertification in Yangqiaopan Township during 1980s-2007. The results showed that the desertification area appeared a tendency of increasing first and then de- creasing, during the study period. The number of desertification patches congregated and expanded, while the landscape of sandy desertification was becoming more fragmented. Fortunately, the degree of the sandy desertifica- tion had manifested declining, because the severe desertification area had decreased by 1 246.5 hm2 and the moder- ate desertification was taken in the leading position rather than severe desertification. But slight and moderate desertification had to be faced potential danger that may convert to severe desertification due to human activities and drought climate. Landscape diversity and evenness increased, and the shapes of heavy desertification patches tended to be simple, while the light, moderate ones tended to be complex, thus, the light and moderate desertification area could be more easily affected by human being.
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Temporal-spatial variability of desertification in an agro-pastoral transitional zone of northern Sh
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