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Study on Community Characteristics of Dipentodon sinicus in Yushe National Forest Park

LIN Chang-song et al (Department of biology,Liupanshui Teachers College,Liupanshui,Guizhou 553004)  
The community characteristics of Dipentodon sinicus in Yushe national forest park of Guizhou Province were analyzed.The results showed that in the 5 000 m2 plot,there were 114 woody plant species,belonging to 84 genera and 47 families,in which,the dominant families were obvious,yet the components of genera were scattered comparatively.As far as Dipentodon sinicus communities of Yushe national forest park were concerned,the species richness index was 5.88.The simpson index was 0.84.The Shannon-Wiener index was 2.45.The inter-specific opportunity was 84.02%.The evenness was 67.56%.And the mean important value of tree layer was 135.69,which was far higher than other species'.Dipentodon sinicus had a great effect on the physiognomy and seasonal aspect of Dipentodon sinicus communities,which presented an obvious seasonal aspect.The dominant populations of Dipentodon sinicus communities showed aggregated distribution in various degrees.The floral geographic elements of Dipentodon sinicus communities in Yushe national forest park had the characteristics of transition from tropics and semi-tropics to temperate.
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