Analysis of forest landscape pattern and fragmentation of Qinling Caiziping forest region

【Objective】 This paper carried research on forest landscape pattern and characteristic of fragmentation of Qinling Caiziping forest region,to provide scientific reference for management,protection and rational utilization of forest resources in research area and south slope of mid-Qinling Mountains.【Method】 Based on the forest management investigation of Caiziping forest region,using the ArcGIS and Fragstats,we analyzed basic feature of landscape pattern,and the degree of fragmentation(Evaluating indicators was edge density,average of fractal dimension index,euclidean nearest-neighbor distance and proportion of like adjacency) of Caiziping forest region.【Result】 The 1 072 patches in research area can be divided into 14 landscape types,non-stocked area takes up only 3.04% of total area,the average of fractal dimension index of every landscape types is close to 1.00,edge density of forest landscape types:Chinese chestnut forestlarch tree forestPinus arrnandii forestsoftwood broad-leaved forestPinus tabulaeformis forestpoplar forestSpruce foresthardwood foresthemlock forestbirch forestfir forestRobinia pseudoacacia forestoakery;proportion of like adjacency:oakeryRobinia pseudoacacia forestfir forestbirch foresthemlock foresthardwood forestpoplar forestSpruce forestPinus tabulaeformis forestsoftwood broad-leaved forestPinus arrnandii forestlarch tree forestChinese chestnut forest;the average of euclidean nearest-neighbor distance:Chinese chestnut forestlarch tree forestbirch forestRobinia pseudoacacia forestfir foresthemlock forestSpruce forestsoftwood broad-leaved forestPinus arrnandii foresthardwood forestPinus tabulaeformis forestoakery.【Conclusion】 The results showed that the distribution of whole forest in the Caiziping forest region is continuous and the degree of patch perimeter complexity in the landscape is low.In all types of forest landscape,the oakery has the largest area,and its degree of fragmentation is the lowest;the Chinese chestnut forest and the larch tree forest are dispersed among many small areas,which indicates the highest degree of fragmentation.The difference from the edge density,euclidean nearest-neighbor distance and proportion of like adjacency of other landscape types is not significant,and the degree of fragmentation of these landscape types is similar,which is in the medium range.