内蒙古多伦县土地沙漠化景观格局变化特征  

Dynamic changes of landscape pattern during desertification in Duolun County of Inner Mongolia

作　　者：阿如旱[1] 杨持[1] 

机构地区：[1]内蒙古大学生命科学学院

出　　处：《应用生态学报》2007年第11期2520-2525,共6页Chinese Journal of Applied Ecology

基　　金：国家重点基础研究发展规划项目(G2000048704);农业部草地资源生态重点开放实验室资助项目.

摘　　要：利用景观分析软件Fragstats 3.3和内蒙古多伦县1960、1975、1987、1995、2000、2005年6期遥感影像解译结果,分析了1960—2005年间土地沙漠化景观格局变化.结果表明:1960—1995年间研究区土地沙漠化面积呈先增后减趋势,总沙漠化面积增加212.70km2,沙漠化斑块数先增多后减少,景观多样性和均匀性上升,轻度、中度、重度沙漠化斑块形状趋向简单;1995—2005年间研究区沙漠化斑块数大幅增加,景观多样性和均匀性下降,轻度、中度、重度沙漠化斑块形状趋向复杂;严重沙漠化斑块形状在1960年以后一直趋向复杂化.整个景观在研究期间表现为完整-破碎-完整-破碎的趋势,由轻度到严重沙漠化,其景观类型的破碎化程度逐渐降低.By using landscape analyzing software Fragstats 3.3 and the interpretation results of remote-sensing images of 1960, 1975, 1987, 1995, 2000 and 2005, this paper analyzed the dynamic changes of landscape pattern during the desertification in Duolun County of Inner Mongolia in 1960 -2005. The results showed that in 1960-1995, the desertification area appeared a tendency of increasing first and decreasing then, with a total increase of 212.7 km^2. The numbers of desertification landscape patches decreased after an initial increase, landscape diversity and evenness increased, and the shapes of light-, moderate-, and heavy desertification patches tended to be simplex. From 1995 to 2005, the numbers of desertification patches increased greatly, landscape diversity and evenness decreased, and the shapes of light-, moderate-, and heavy desertification patches tended to be complex. Since 1960, the shapes of severe desertification patches had been inclined to complication. In the study period, the whole desertification landscape showed a trend of integrity-broken-integrity-broken, and the broken degree of the patch types of desertification landscape was gradually from light down to severe.

关 键 词：景观格局 动态变化 景观指数 内蒙古多伦县 

分 类 号：P901[天文地球—自然地理学] P931.3