PLANT COMMUNITY DIVERSITY IN DONGLINGSHAN MOUNTAIN,BEIJING,CHINA MEASUREMENT OF BIOTIC COMMUNITY DIVERSITYV. METHODS FOR ESTIMATING THE NUMBER OF SPECIES IN A COMMUNITY Effects of spatial heterogeneity on spatial extrapolation of sampling plot data.  Spatiotemporal variation of plant community aspections in the north-subtropical zone of eastern China Quantitative Relationship between Hyper-spectral Red Edge Position and Canopy Leaf NitrogenConcentration in Rice Spatial extrapolation of the vegetation growing season in temperate eastern China Analysis on Robustness and Extrapolation Errors of Modeling Fuel Moisture Content of Dead Twigs of Larch by Direct Estimation From Observed Data