Abstract: By using the 2000-2008 MODIS land information MOD15A2 (fPAR) and the TRMM data of air temperature and precipitation in tropics, this paper studied the vegetations spatiotemporal variation in Southeast Asia, with the focus on the inter-annual and seasonal variations of fPAR in evergreen broadleaf forests, woody savannas, grasslands, and croplands, and the correlations of these variations with climate conditions. In 2000-2008, the vegetations fPAR in Southeast Asia was averagely 47.58%, being increased from northwest to southeast and from coastal area to inland. In 87.34% of the study area, the fPAR had no significant variation. The fPAR could well reflect the vegetation seasonal variation in Southeast Asia, and had good responses to climate change. The variations of the fPAR suggested that the inter-annual variation of vegetation growth differed with regions, and the variation degree under the effects of air temperature and precipitation also varied.

Key words: Carex lasiocarpa wetland, Standing litter, Underground biomass, Decomposition rate, Seasonal dynamics