Abstract:In order to reveal the influence of tourism disturbance on characteristics of Rhododendron community in Baili Rhododendron Scenic Area, two Rhododendron communities of pure Rhododendron forest and mixed Rhododendron forest were selected to analyze the impact of disturbance on community structure and species diversity. The tourism influence index was applied to explore the impact of different tourism disturbance degrees and disturbance approaches on the Azalea communities' characteristics by using typical sampling method. The results showed that 1) there were 130 species azalea of 102 genera and 67 families in the Baili Rhododendron forest. The pure forests included 97 species with the dominant species of rhododendron delavayi, fargesia and rhododendron irroratum. The mixed forests included 115 species with the dominant species of rhododendron delavayi, rhododendron irroratum and rhododendron simsii. 2) The two Rhododendron communities had the highest Berger-Parker richness index and Shannon diversity index at moderate disturbance level. Moderate disturbance promoted the increase of species diversity of Rhododendron community to a certain extent. The difference was that the Shannon index of the two communities changed. The variation trend in the pure forests is moderate disturbance > light disturbance > severe disturbance, while that is moderate disturbance > severe disturbance>light disturbance in mixed forests. The communities are more abundant and stable with strong resistance under tourism disturbance in mixed Rhododendron forests than that in pure Rhododendron forests. 3) The garbage index and trample index have no obvious correlation with the species diversity index and community growth structure of the mixed Rhododendron forests, while the garbage index is significantly negatively correlated with the Shannon diversity index, species number and herb mean height in the pure Rhododendron forests. The trample index shows a very significant negative correlation with the height and coverage of the shrub layers of the pure forests, which is positively correlated with herb mean height. 4) Each Rhododendron community responds differently to tourism disturbances. In order to maintain the stability of Rhododendron community, it necessary to divert the tourist during the flowering season and the severe disturbance of pure Rhododendron forests should be strictly controlled.