Sexual differences in climatic response of dioecious Populus davidiana tree. Responses of Qilian junipers radial growth of different ecological environment and detrending method to climate change in Qinghai Province Spatiotemporal Changes of Vegetation Coverage in Xilin Gol Grassland and Its Responses to Climate Change during 2000-2010 Influences of slope aspect on the growth of Sabina przewalskii along an elevation gradient in China’s Qinghai Province