Abstract: This study was conducted at forest communities of giant panda habitats in Foping National Nature Reserve, Longcaoping Nature Reserve and Pingheliang Nature Reserve. The data of altitude, slope, aspect, canopy density, shrub coverage, bamboo density and bamboo biomass were collected to conduct cluster analysis and factor analysis. The results showed that the forest communities of the winter habitat of the giant panda were mainly constituted by Quercus aliena var. acuteserrata forests. The slopes were relatively plain with an average degree of 11.7°and the slope aspects were mainly Southeast; The canopy density, shrub coverage, bamboo density, bamboo biomass were 0.59, 74%, 92 800 plants·hm^-2 and 15.78 t·hm^-2, respectively. The forest communities of the summer habitat of the giant panda habitat were mainly constituted by Abies fargesii forests. The slopes were relatively gentle with an average degree of 17.2°and the slope aspects were mainly Southeast and Northeast. The canopy density, shrub coverage, bamboo density, bamboo biomass were 0.6, 71%, 465 600 plants·hm^-2and 8.76 t·hm^-2, respectively. According to the results of factor analysis, the bamboo biomass and shrub coverage were the main factors regulating the habitat selection of giant pandas, which may be closely related to ample food resources for giant pandas in those habitats.

Key words: habitat selection, giant panda, forest community, cluster analysis, factor analysis