Abstract:The horizontal and vertical differences of the microclimatic elements in three canopy gaps of different sizes (200m 2、 140m 2、60m 2) and in the understory within a tropical rain forest (dominated by Shorea chinensis ) in Xishuangbanna were measured using light intensity, air temperature, air relative humidity and ground surface temperature The results indicated that the variation of the air temperature, ground surface temperature and air relative...