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Differences of saikosaponin contents in Bupleurum chinense from habitats in Dongling mountain & Wuling mountain of Beijing LIFE HISTORY CHARACTERISTICS AND SPATIAL DISTRIBUTION OF THE BETULA PLATYPHYLL A POPULATION IN THE DONGLING MOUNTAIN REGION, BEIJING, CHINA STUDIES ON SPECIES AND PATTERN DIVERSITIES OF THE FOREST LANDSCAPES OF DONGLINGSHAN MOUNTAIN REGION,BEIJING,CHINA STUDIES ON PLANT COMMUNITY DIVERSITY IN DONGLINGSHAN MOUNTAIN,BEIJING,CHINA: Ⅺ.THE β DIVERSITY OF MOUNTAIN MEADOW Distribution Patterns and Their Seasonal Changes of Carabus Beetles in Dongling Mountain Region Near Beijing DCA Ordination, Quantitative Classification and Environmental Interpretation of Plant Communities in Dongling Mountain Study on Life-Form Spectrum of Plant Community in Dongling Mountain FLORA AND ECOLOGICAL CHARACTERISTICS OF FERNS IN DONGLING MOUNTAIN AREA Characteristics of precipitation and forest stemflow of Dongling Mountainous area Viewpoints on the study of economic thresholds of cotton bollworm ON THE CHARACTERISTICS OF THE FLORA OF DONQLING MOUNTAIN AREA AND ITS RELATIONSHIP WITH A NUMBER OF OTHER MOUNTAINOUS FLORAS IN CHINA Comparative study concerning the effects of rare species treatments on RDA ordination Effects of altitude on soil microbial community in Quercus liaotungensis forest. Pattern of Larix principis-rupprechtii Plantation and Its Environmental Interpretation in Dongling Mountain Landscape Pattern and Fragmentation in Donglingshan Montane Region Research on Restoration of Warm Temperate Degraded Ecosystem in Dongling Shan Area Leaf Demography of Quercus liaotungensis in Dongling Mountain Evaluation of soil and water conservation capacity of different forest types in Dongling Mountain Analysis of Species Diversity of the Forest Vegetation in Dongling Mountain, Beijing Content and Ratio of Carbon and Nitrogen of Three Types of Warm Temperate Deciduous Broadleaf Forests in Dongling Mountain Seed Demography of Quercus liaotungensisin Dongling Mountain Region Comparison of Seedling Recruitment and Establishment of Quercus wutaishanica in Two Habitats in Dongling Mountainous Area, Beijing Net Nitrogen Mineralization and Nitrification in One Pure Pine (Pinus tabulaeformis) Forest and One Pine-Oak Mixed Forest in Dongling Mountainous Region