Effects of tree species diversity on fine-root biomass and morphological characteristics in subtropical Castanopsis carlesii forests. Polypore diversity in main natural larch forests in China. Population structure and understory species diversity of different aged Pinus sylvestrisvar. mongolica plantations in Nenjiang Sandy Land of Northeast China. Response of Polygonum viviparum Species and Community Level to Long-term Livestock Grazing in Alpine Shrub Meadow in Qinghai-Tibet Plateau Altitudinal Pattern of Plant Species Diversity in Shennongjia Mountains, Central China THE MODIFIABLE AREAL UNIT PROBLEM OF SPECIES DIVERSITY IN THE FOREST COMMUNITY OF NORTHERN FUJIAN PROVINCE