Spatial-temporal Variations of Net Primary Productivity of Qilian Mountains Vegetation Based on CASA Model Temporal and spatial variability of soil available nutrients in arable Lands of Heyang County in South Loess Plateau Spatial-temporal variations in eco-service values of pond aquaculture in Shanghai Evaluation of tourism environmental comfort and its spatial-temporal differentiation: a case study of West Lake in Hangzhou, China SEASONAL ASPECT STAGES OF PLANT COMMUNITIES AND ITS SPATIAL-TEMPORAL VARIATION IN TEMPERATE EASTERN CHINA SEED DISPERSAL AND SPATIAL-TEMPORAL VARIATION OF SEED PREDATION OF MUSA ACUMINATA IN XISHUANGBANNA, SOUTHWEST CHINA Spatial-Temporal Variability of Caragana korshinskii Vegetation Growth in the Loess Plateau