Research On The Spatial Structure Of Natural Forest

The spatial structure of the natural forest reflects the internal structure of the natural forest,which is of great significance for the protection of forest,the optimization of forest structure and the construction of near forests.Based on the study of the spatial structure of the natural forest,this thesis is based on the fixed sample plots of the Cen Wang Lao Shan National Nature Reserve,select the dominant tree species:Neolitsea aurata;Beilschmiedia fordii;Lithocarpus hancei;Eurya impressinervis;Dipentodon sinicus;Symplocos wikstroemiifolia;using the total station,GPS positioning system to collect the basic information of tree species;using ArcGIS and Winkelmass software to calculate the spatial parameters of forest;by analyzing the dominance tree species composition,stand diameter,tree species dominance,angular scale,size ratio,mixing degree and the terrain parameters related to the sample plot,combining the spatial structure of the forest stand with the sample plot,for the construction of near natural forest to seek change.The results show:Natural forest species richness is higher,there are 103 tree species in the tree layer,the distribution of diameters is obvious pyramid-like structure distribution,the vertical structure of community is obvious,among the competitive tree species,the Neolitsea aurata is the superior species of the upper layer of trees,and the Lithocarpus hancei are the dominant species of small trees under the canopy;The average mixed degree of forest stands is 0.749,which is in the mixed state of strength.The average angle of forest stands is 0.510,which is random distribution.The average grain size ratio is 0.485,and close to 40%of trees are in the dominant state.The dominance of the dominant population is obvious,the community is in a relatively stable state.