Community Characteristics of Alpine Shrub Salix oritrepha TWO NEW SPECIES OF ROEGNERIA C. KOCH FROM QINGHAI Estimating heavy metal concentrations in topsoil from vegetation reflectance spectra of Hyperion images: A case study of Yushu County, Qinghai, China. Assessment of vegetation by object-oriented classification and integration of decision tree classifier in Yushu Soil Microbe Characteristics of Alpine Grassland under Different Management Regimes in the Yushu District of Qinghai Province, China A taxonomic revision of Caragana tangutica Maxim. ex Kom. and C. kozlowi Kom. (Leguminosae)