Accessibility analysis of urban parks: methods and key issues Spatial distribution and evolution of aeolian sandy land in the areas around Lhasa Airport (Tibet, China) since 1990 Spatial distribution of root system of different riparian plant configuration modes Modeling the effects of topography on the spatial distribution of secondary species in a small watershed in the Gully region on the Loess Plateau, China Seasonal dynamics and spatial distribution of herbage diversity on the slopes of Suiyu railway The vegetation carbon reserve and its spatial distribution configuration of grassland ecosystem in Tibet Spatial distribution characteristics of forest soil organic carbon stock in Sichuan Province Edge correction of point pattern analysis′function and its application on spatial pattern analysis of insect population Simulation of forest net primary productivity in northeastern China with IBIS Age Structure and Spatial Distribution Pattern of Endemic Plant Camellia mairei var. lapidea Population in Guizhou Province, China Spatial Distribution Pattern and Sampling Technique of Batocera lineolata(Coleoptera:Cerambycidae) Population in Ash Trees Distribution Pattern of Female Flowers in Crown and Less Catkins Clones Selection of Aigeiros Damage Characteristics and Spatial Distribution of Sphenoptera sp. Larvae Ecosystem dynamics in the ‘Returning Rangeland to Grassland’ programs, China Population Structure and Spatial Distribution Pattern of Natural Regeneration Larix principis-rupprechtii in Guandi Mountain Population Structure and Spatial Distribution Patterns of a Naturally Regenerated Jatropha curcas L.Population in a Dry Hot Yuanmou Valley in Yunnan Population Ecological Characteristics of the Rare and Endangered Plant Camellia rhytidophylla from Guizhou Community characteristics of natural Pinus tabulaeformis forest in Hilly Loess Regions