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林窗是群落演替的起始地 ,其本身的特征影响着环境因子 ,进而影响森林的结构、物种组成、种群动态等 .利用西双版纳湿热季次生林林窗的实测气温资料 ,探讨该林窗气温的分布特征 .结果表明 :热带次生林林窗 4个方位不同位置的气温日变化具有 2～ 3个峰值 ;日平均气温的高低顺序是林窗边缘 >扩展林窗边缘 >林内 ;林窗内气温日较差较小 ;林窗内不同位置相对林窗中央具有增加低温和降低高温的效应 ,这种增温效应 (0 .4～ 0 .6℃ )较降温效应 (-1.4～ -1.5℃ )弱 .其结果可为林窗小气候形成机制及森林群落的演替与更新等提供科学依据
The forest gap is the starting point of community succession and its own characteristics affect the environmental factors, which will affect the structure, species composition and population dynamics of the forest.Based on the measured temperature data of the secondary forest gap in Xishuangbanna, The results showed that the diurnal variation of air temperature in 4 locations of the secondary forest gap had 2 ~ 3 peaks, and the order of the daily average air temperature was in the edge of the forest gap> the edge of the expanded gap> the temperature in the forest window And the difference is relatively small. The relative position of the gap in the forest window has the effect of increasing the low temperature and decreasing the high temperature. The warming effect (0.4 ~ 0.6 ℃) is weaker than the cooling effect (-1.4 ~ -1.5 ℃) The results can provide a scientific basis for the formation mechanism of gap microclimate in forest gaps and the succession and renewal of forest communities