| With the improvement of people’s quality of life and the outstanding demand for high-quality ecological products,forest landscape has been paid more and more attention.Forest landscapes have many economic,ecological and aesthetic values,and is one of the main carriers for the construction of forest parks and the development of forest tourism.Ziwuling forest region in Gansu Province is the most important forest distribution region in Longdong.In order to understand the forest landscape status in this region,the core area of Dafengchuan Forestry Station was taken as the research object,and the characteristics of forest landscape pattern were systematically studied,so as to reflect the recreation and appreciation of forest landscape in the forest region.Based on the data of forest resource inventory and planning of Dafengchuan Forestry Station in 1986,1996 and 2008,the forest landscape of Dafengchuan was analyzed by using the basic principles of landscape ecology,geographic information system technology and landscape index analysis method.This paper analyzes the forest landscape of Dafengchuan from four aspects:the overall characteristics of the forest landscape,the patch characteristics,the heterogeneity of the landscape and the spatial distribution pattern of the landscape.The characteristics and pattern of forest landscape in this region were analyzed comprehensively and systematically,and the ways and measures of forest landscape optimization were put forward,which provided theoretical basis for realizing scientific management and management of forest landscape.The results show that:1.The forest landscape of Dafengchuan Forestry Station in Qingyang city of Gansu province is divided into forest land,thin stocked land,shrub land,immature forest land,suitable forest land,nursery land and non-forestry land according to the types of forest land.Among them,there are 15478.56hm~2forestland,175.23hm~2thin stocked land,74.88hm~2shrub land,79.74hm~2immature forest land,267.03hm~2suitable forest land,18.18hm~2nursery land,61.56hm~2non-forested land in 2008;Forest land includes hard broad-leaved forest land,soft broad-leaved forest land,coniferous forest land and other landscape types,among these forest land,hard broad-leaved forest land is 3737.61hm~2,soft broad-leaved forest land is 11158.02hm~2,coniferous forest land is 582.93hm~2.2.Forest land is the matrix landscape of the whole study area,the PLAND is 95.81%,the AI is 99.05%,which has a profound impact on the structure and function of the whole landscape.The sum of PLAND of thin stocked land,shrub land,immature forest land and non-forest land was less than 5%,and the AI was less than 1%,these patches were inlaid in the study area.3.From 1986 to 2008,the forest landscape area of Dafengchuan Forestry Station remained stable,since the forest landscape is weakened by human disturbance,it is deeply influenced by the natural environment,and the TE of landscape patches and the proportion of irregular landscape shape increased continuously.In 22 years,the TE increased from679230m in 1986 to 981120m in 2008,with an increase of 301890m.4.In terms of forest landscape patch characteristics,broad-leaved forest is the main forest landscape.As compared with 1986,the fragmentation degree of landscape patch types was aggravated,the landscape connectivity was reduced,the overall heterogeneity of forest landscape was improved,and the material and energy exchange and mutual influence between heterogeneous patches were strengthened.In terms of the spatial distribution pattern of the landscape,the broad-leaved forest are distributed in clusters,while the thin stocked land,shrub land and nursery land are dispersed,and the overall distribution of landscape patches is relatively uniform.5.In Dafengchuan Forestry Station,the ornamental value of forest landscape is not high,the diversity of landscape is poor,and the landscape fragmentation is still aggravating,through the management measures of tree species allocation,stand density adjustment and forest phase transformation,the forest landscape is optimized and the recreation and appreciation of the forest landscape is improved. |
