Carbon Dynam ics of L itter Decomposition in Six Forest Standsof Subtropica l China Study on the ecological vulnerability of the Fugong Country, Yunnan Province based on land-use pattern Influencing factors of soil respiration and their response to different land use types in the water-wind erosion crisscross region The influence of meteorological factors and soil physicochemical properties on karst processes in six land-use patterns in summer and winter in a typical karst valley Effects of land-use pattern change on soil and water loss at the catchment scale in the hilly and gully area of the loess plateau of China