Spatial distribution patterns of species diversity and their relationships with scale are of great significance to understand the mechanism of community species diversity formation. Here,a field survey was conducted to assess the variation in species diversity along spatial scales in a karst evergreen and deciduous broad-leaved mixed forest,Southwest China. Based on the dataset of woody plants( DBH≥1) from a 25 hm~2 plot,the spatial distribution patterns of species abundance,species richness,and Shannon-Wie...