| Landscape Spatial Structure, is an important content and one of the basal features in the research of Landscape Ecology. In this paper, basing on forest type map and forest management sub compartment survey database, on a GIS platform, (represented by indices as patch number, patch size, dominance index, richness index, fragmentation index) in the Maoershan Forest Farm was analyzed. 25 path type were identified and it has been done on investigate area by testing the randomicity of the tree pattern.The fragmentation degree in Maoershan Forest Farm is high enough that it is hard to distinguish matrix from patch although the distribute area of soft broad-leaf tree forests is the biggest in the all regions and are relatively dominant. The patch number trends to a decrease continuously with the increase of patch area.50% of patches aresmaller than 5 hm . Most of patches with area >50hm2 are natural secondary forest. The patch shape index of natural secondary forest is obviously higher and more irregular than that of artificial stand.In Maoershan Forest Farm, it is to some degree correlation that intensity of human beings' activities affects the variety of diversity of Landscape and pattern of Landscape. Although the human has some effect on them in some area, it isn't the main factor. It is the nature environment, which decide the spatial pattern of landscape. The nature environment includes altitude, slop and aspect. Altitude and slop are the main factor which affect distribute.In this paper,it is found that the tree pattern in the secondary forest is mainly random and regular by testing the randomicity of the tree pattern in 101 permanent sample plots. Contagious pattern is generally caused by forest gap, which don't always cause contagious pattern, but if the forest gap is artificially expanded, the random pattern may be changed to contagious pattern. Reserving the trees around forest gaps in selection cutting design may reserve the original spatial pattern.
|
PDF Full Text Request