Cap dynamics and landscape patterns of forest in central subtropical evergreen broad-leaved forest—A case study from Wanmulin Natural Reserve Area in Fujian Province Comparative Study on Microclimate of Vegetation over Different Successional Stages of Castanopsis Platyacantha-Schima sinensis Formation in the Central Subtropical Zone in Sichuan Province Soil nitrogen and phosphorus availability in forest ecosystems at different stages of succession in the central subtropical region