【英文摘要】Studies on ecological flows across heterogeneous landscape remain at the frontier of landscape ecology. Nutrient flows associated with wind-driven litter transportation and hydrologic flows (rainfall input, canopy leaching, soil leaching, and runoff output) were measured in the four ecosystem patches. We found that the quantity of wind-driven nutrient transport was much larger than the water-driven one. Based on the analysis of nutrient fluxes and budgets of different patch ecosystems, we concluded that positioning the Acacia mangium plantation on the upper slope of the watershed landscape was an appropriate spatial arrangement. Over 1/3-1/6 Acacia litter could be moved to other landscape components (e.g., the fruit garden) as organic fertilizers. A spatially-interactive ecosystem model, TEPS (terrestrial ecosystem processes simulator) was developed on the basis of a process-based ecosystem model, PALS (patch arid land simulator), which include four modules: water cycling, plant production, soil organic matter decomposition, and canopy energy balance. The parameterization and validation of the model is still ongoing. During the development of TEPS, we used PALS conducted a series of simulation analysis to address how ecosystem productivity, soil organic matter, and soil respiration respond to environmental changes such as elevated CO2, altered precipitation pattern, warming, and increased N deposition. The major finding was that ecosystem responses were nonlinear when all the factors were strongly interactive but linear when one factor played dominant role. Further researches would be focused on modeling how changes in patch area (area effect), spatial configuration (position effect), and human management activities (disturbance effect) would influence N and P outputs from the terrestrial portion to the water portion of the studied watershed landscape.