Study on Hydrochemical Cycling in Tropical Mountain Rainforest Ecosystem Study on the CO2 grads and flux in near canopy layer of tropical mountain rainforest at Jianfengling, Hainan Island Study on the Characteristics of Runoff Yield in a Regenerative Tropical Mountain Rainforest Influence of Canopy upon Rainfall in a Regenerative Tropical Mountain Rain Forest at Jianfengling of Hainan Island Spatial distribution characteristics of soil organic carbon density in a tropical mountain rainforest of Jianfengling, Hainan Island, China Climate changes characteristics over tropical mountain rainforest in Jianfengling during the recent 26 years: radiation,moisture,and wind factors Effect of Tropical Mountain Rainforest Ecosystem on Water Quality of Precipitation