Spatial distribution and concept of “three zones / two corridors” of nature reserves in Beijing Interspecific Segregation in the Main Species of Evergreen Broad-leaved Forest in Nanling National Nature Reserve, Guangdong Province Discussion on several indices assessing landscape dispersion Study on Spatial Connection and Fractal Characteristics of Prop Roots of Natural Rhizophora Stylosa Study on Neighbor Effects of Three Dominant Species in the Evergreen- deciduous Mixed Forest in Jiugongshan Natural Reserve MULTI-SCALE ANALYSES OF POPULATION DISTRIBUTION PATTERNS Research on plant populations spatial distribution pattern in the periods of highway-construction on the road-ecology region: take Baoji-Tianshui Observation on Spatial Structure of Rhizophora stylosa Prop Roots in Techeng Island