Study on the Niche of Arbor Dominant Species of Forestry Community in Nayong Nature Reserve of Guizhou Province

Based on the data collected from sampled data the area occupying more than 9100 m2, using important values as the resource-status-index, the niche breadth, nich overlap and niche similarity of 24 arbor dominant species in Nayong Nature Reserve of Guizhou were studied in the paper. The results showed that there is a significant positive correlation between the niche overlap values and niche similarity values, indicating that the forest communities might be struggling to lead to the phase of the best.