Sensory Evaluation on Smoke Characteristics of Tobacco Leaves from Xiangxi Areas On Spatial Pattern of Species Richness in Plant Communities Along Riparian Zone in Xiangxi River Watershed TWO NEW SPECIES OF WOODY PLANTS FROM HUNAN Impact of cascade hydropower stations on suspended particulate matter in Xiangxi River Investigation on Phytoplankton in Xiangxi River Watershed and the Evaluation of Its Water Quality A preliminary assessment on the Xiangxi River ecosystem services Dynamics of the main nutrients input to Xiangxi Bay of Three Gorge Reservoir Leaf litter decomposition dynamics of different tree species in Xiangxi River watershed, the Three Gorges region Dynamics of Nitrogen and Phosphorus Content during Leaf Litter Decomposition in Xiangxi River Watershed,the Three Gorges Region River continuum characteristics of Xiangxi River Seasonal Dynamics of Litter in a Headwater Stream of Riparian Forest in Xiangxi River Catchment DISTRIBUTION OF ORGANIC MATTER CONTENTS OF TOBACCO-GROWING SOIL AND ITS INFLUENCING FACTORS IN XIANGXI Ecological Adaptation of Huperzia serrataⅠ Leaf and Stem Anatomical Characterstics Comparison of leaf decomposing rate in a headwater stream in Xiangxi River catchment