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The characteristic of land changes in ecologically fragile Kast Areas: a case study in Northwest Guangxi, China Application of 3S techniques in ecological landscape planning of Harbin suburb Theory and practice in program of ecological demonstrative area construction Landscape classification in a small area for soil series survey and mapping: a case study in the Ningzhen hills, China A Model of Nest-Site Selection of Red-Crowned Crane Based on RS, GIS and GPS Techniques at Zhalong Wetland, China THE FORMATION AND MAINTENANCE MECHANISMS OF BIODIVERSITY AND THE RESEARCH TECHNIQUES FOR BIODIVERSITY