千岛湖区破碎化生境景观的归一化植被指数特征分析

Characteristics of Normalized Difference Vegetation Index of Fragmented Landscape in Thousand Island Lake Area

基于TM遥感数据,以杭州市淳安县千岛湖区的典型岛屿化生境景观为研究对象,探讨该破碎化生境景观内归一化植被指数(ND,V,I)的特征,并分析ND,V,I值的变化是否受到岛屿面积和岛屿间距离的影响。结果表明:超大、大、中和小岛屿的ND,V,I值分别为0.24、0.17、0.15和0.07,岛屿的ND,V,I值与岛屿面积呈极显著正相关。岛屿样带1、2和3与大陆1的最小距离呈递增趋势,而其ND,V,I值分别为0.16、0.09和0.07,存在递减趋势但不显著;集中岛屿和分散岛屿的ND,V,I值为0.11和0.08,亦存在递减趋势但不显著。岛屿的ND,V,I值与岛屿间的距离呈不显著负相关。

A study was performed to discuss the characteristics of normalized difference vegetation index （NDVI） using TM re- mote sensing data of the typical fragmented landscape in Thousand Island Lake area of Chun＇ an County, Hangzhou. And the impacts of island area and distance between islands on NDVI were analyzed. Result revealed that the NDVI of super- large, large, middle and small islands were 0.24, 0.17, 0.15 and 0.07, respectively, and a highly significant positive correlation was observed between NDVI value and island area. The minimum distances between the islands and the main- land 1 for transects 1,2 and 3 showed an increasing trend, and their NDVI values were 0.16, 0.09 and 0.07, respective- ly, exhibiting a decreasing trend. The NDVI values of the aggregated islands and scattered islands were 0.11 and 0.08 re- spectively, exhibiting a downward trend, but there was an insignificantly negative correlation between NDVI value and dis- tance between islands.