Human impacts on landscape structure in Wolong Natural Reserve Species-abundance relation of herb communities in subalpine timber-line ecotone of Wolong Natural Reserve,Sichuan Province,China Study on the Species Diversity of Plant Community in the Giant Panda Habitat of Wolong Natural Reserve:Species Richness, Species Diversity and Evenness Response of foliar δ13C of Quercus spinosa to altitudinal gradients THE FOREST SOIL MOISTURE REGIMES OF WOLONG NATURAL RESERVE Aboveground Biomass of Quercus aquifolioides Shrub Community and Its Responses to Altitudinal Gradients in Balangshan Mountain, Sichuan Province