Associations between Community Structure and Microtopography in Mixed Broadleaf-conifer Forest of Jiaohe, Ji-lin Province
We studied the associations between spatial community structure species diversity and microtopography with the data of a 320 m×660 m plot in temperate mixed broadleaf-conifer forest in Jiaohe of Jilin province.Topographic variables and space variable can be used to explain 67% of species spatial variance in tree community together.Topographic variables can be used to explain 41%of spatial variability in tree community alone.Topographic variables affect significantly trees size differentiation and stand basal area, which explains 15.47%of spatial variation in trees size differentiation and 41.5%of spatial variation in stand basal area, respectively.The explanation capacity of topographic variables is 15.33%for tree species richness and 22.29% for Shannon diversity.But topographic variables show lower explanation capacity for tree species abundance and aggregation.Tree size differentiation positively relates to elevation, slope, convexity and ridge, but negatively relates to hillside.CCA analysis between community structure and topographic variables shows that community is determined by slope, and exhibits a significant change of elevation gradient.Meanwhile, topographical position ( valley and ridge) affected strongly community structure.The results show the response of community characteristic to microtopog-raphy in temperate mixed broadleaf-conifer forest.
NETL
NSTL
万方数据
维普
