Effect of water table to niche of plant population at Minqin oasis fringe The grassland degradation problems of the Minqin oasis, in the lower reaches of the Shiyang River Basin Landscape changes of Minqin oasis in Gansu Province and its driving force Quantitative Classification and Ordination Analysis on Vegetation in the Minqin Oasis-Desert Ecotone Technical system of rational land use and deserticulture in desert oasis — A case study of Minqin Oasis Dynamic analysis of farmland ecosystem service value and multiple regression analysis of the influence factors in Minqin Oasis Landscape changes and ecological reconstruction in Minqin Huqu oasis