关键词: 嘉陵江流域, 植被景观, 空间格局, 景观指数

Abstract:

In this paper, the features of patch characteristics, heterogeneity, diversity & evenness, and spatial relationship were analyzed in the Jialing River basin by using landscape indexes with remote sensing images. It was shown that “One year one ripe grain fields and coldtolerant economic crop fields deciduous orchards” is the background for its bigger area in the basin, and other components are surrounded. “Broadleaf evergreen and deciduous mixed forests in subtropical zone” has the lowest heterogeneity degree for its smallest area and less disintegration. On the contrary, “Bare ground / City” has the highest heterogeneity degree because of its long patch distance, more disintegration and better comparability. Although “Broadleaf deciduous forests in temperate zone” has good aggregation ability and comparability, as well as short patch distance, its natural cohesion ability is poor. It is obvious that in Jialing River basin, many landscape components with good patch cohesion are distributed, forming a pattern of landscape fragmentation. On the other hand, the high landscape diversity and evenness indexes owning to rich and wellproportional components are distinct features in the basin.

Key words: Jialing River basin, vegetation landscape, spatial pattern, landscape index