The impacts of accelerated erosion on soil nutrient loss and microbial quantity following deforestation in the Ziwuling area Seasonal dynamics in soil microbial biomass carbon and nitrogen and microbial quantity in a forest-alpine tundra ecotone, Eastern Qinghai-Tibetan Plateau, China Dynamics of Soil Microorganism and Enzyme Activity in Typical Steppe of Restoration Succession Process Vegetation characteristics, abundance of soil microbes, and soil physico-chemical properties in desertified alpine meadows of Maqu