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作 者 ：李锋

期 刊 ：生态学报 2002年 22卷 9期 页码：1507~1511

关键词：景观多样性；荒漠化；景观基质；沙珠玉沙区；榆林沙区；

Keywords:landscape diversity, desertification, landscape matrix, Shazhuyu sandy area, Yulin sandy area,

摘 要 ：利用青海沙珠玉沙区英德尔乡和陕西榆林沙区可可盖乡两个典型荒漠化地区两个时期的土地利用和荒漠化数据 ,分析了多样性、优势度和均匀度等景观多样性指标在两个地区的变化规律及其指示的景观生态学意义。研究结果表明 ,这些指标在两个地区都能够较好地评价荒漠化土地的动态变化规律 ,对分析荒漠化土地的发展趋势具有较好的指示意义。但由于景观基质的影响 ,上述指标在两个地区存在着完全不同的变化趋势 ,即随着荒漠化土地的增加 ,在沙珠玉沙区表现为多样性指数增加、优势度指数减小和均匀度指数增大 ;在榆林沙区则表现为多样性指数减小、优势度指数增加和均匀度指数减小。

Abstract:This paper describes the preliminary findings of the study of the impacts of landscape matrices upon the landscape diversity changes, taking into account the two sandy areas of Shazhuyu in Qinghai Province and Yulin in Shaanxi Province. Based upon the analysis of landscape diversity changes in the two sandy areas, it was concluded that the diversity index and evenness index of Yingde’er Township in Shazhuyu sandy area were in an increase trend while that of Kekegai Township in Yulin sandy area in a dec...

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