Mattic Epipedon Impact on Water Conservation in Alpine Meadow Distribution Patterns of Ratio of Root to Soil and Soil Physical Chemical Characteristics at the Different Degraded Successional Stages in an Alpine Meadow Spatial heterogeneity dynamics of soil carbon and nitrogen in the mini-patches during degeneration succession of grassland communities Soil nitrogen and phosphorus stoichiometry in a degradation series of Kobresia humulis meadows in the Tibetan Plateau