Fifteen-Year Changes of Tree Layer in Secondary Castanopsis Schima Humid Evergreen Broad Leaved Forest in Central Subtropics of Western China Effects of various trampling stresses on turf characteristics and the natural recovery of Zoysia metrella The effect of low-covered sand-fixing forest belts on restoration of the soil and vegetation FIFTEEN-YEAR CHANGES OF TREE POPULATIONS IN THE SECONDARY SUBTROPICAL EVERGREEN BROAD-LEAVED FORESTS IN SOUTHWESTERN CHINA Comparative study on plant diversity of Xiaonanshan and Yingrenshi Mountain area in Shenzhen, China Characteristics of plant species diversity in a windthrow area on Changbai Mountain after 26 years of natural recovery Research on the application of natural ecological restoration in a typical region of China with red soils An intellectual enquiring about ecological restoration and recovery, their scientific implica-tion and approach