中文摘要：

通过了解流域景观格局指数的尺度效应,能客观反映土地利用景观格局及其动态变化。以MODIS和OLI为数据源,针对地区社会经济活动频繁、人为干扰强烈和生态脆弱等特性,以土地利用/土地覆盖（LUCC）类型为斑块类型划分依据,将流域内的LUCC类型划分为7种景观类型,选取类型水平和景观水平来计算景观特征指数,分析不同景观格局尺度效应的响应情况。结果表明：（1）在类型水平上,随着空间分辨率的不断降低,MODIS和OLI影像所计算的斑块密度都随着粒度的增大而减小;斑块面积的变化趋势相似,除个别地类变化剧烈外,其余各地类的变化幅度较小。MODIS影像中各地类的周长面积分维度的总体趋势是减小的;OLI影像所计算的周长面积分维度的总体趋势成基本持平状态。凝聚度指数、边缘密度、斑块面积百分比、斑块类型面积和有效网格大小的散点图分布较为集中,有个别尺度下的某一土地利用类型出现异常的现象。（2）在景观水平上,不同遥感影像中各景观指数的变化趋势表现出不同形式,且不同景观指数间的变化趋势也存在差异。随着空间尺度的增大,斑块密度、景观形状指数和斑块数量均呈现单调下降的趋势;最大斑块指数的变化趋势不确定;香农多样性和香农均匀性指数的整体变化趋势相对稳定。

英文摘要：

The scale effect of watershed landscape pattern index can be used to objectively reflect the landscape pattern and the dynamic change of land use information. The Ebinur Lake Watershed was selected as the study area to quantitatively research the multi-scale features of landscape pattern by resorting to the image data of MODIS and OLI,and 7 typical landscape types were classified by taking the types of land use/cover change（ LUCC） as the patch types based on human activities and vulnerable ecology in the drainage basin. In the same scale changes,the response of different landscape pattern scale effect was analyzed. The results are as follows：（1） At the patch type level,the patch density calculated with MODIS and OLI images was decreased with the increase of particle size because of the lower spatial resolution. The change trend of patch area was similar to the grain size change. The overall trend of perimeter area fractal dimension of the MODIS images was reduced,but that of OLI images was basically maintained. The patch cohesion index,edge density,patch area percentage,patch type area and effective grid size were intensively distributed except the abnormity of few land use types under individual scales;（2） At landscape level,the change trend of the landscape index of different remote sensing images was different. The patch density,landscape shape index and number of patches were in a monotonically decrease trend with the increase of spatial scale,the change trend of the highest patch index was uncertain,and the holistic change trend of Shannon＇s diversity and evenness index was relatively stable.