长白山区沟谷乌拉苔草Carex meyeriana沼泽湿地气候效应

通过对长白山区沟谷沼泽典型乌拉苔草湿地土壤温度、乌拉苔草群落相对湿度、叶片温度、风速、光量子通量密度以及蒸腾速率的日变化和蒸腾速率的季节变化的研究,初步揭示沟谷乌拉苔草沼泽湿地的气候效应。结果表明长白山沟谷沼泽湿地具有三江平原沼泽同样的冷湿效应。土壤化通时间比三江平原化通时间提前1个多月,蒸腾速率日变化不同季节趋势基本一致,不同层次叶片的蒸腾速率日变化趋势基本一致,最大值在7至8月份蒸腾速率(H2O)达到100~140 mol.m-2.s-1。光量子通量密度与温度成正比,与湿度成反比,大气温度日变化和叶片温度日变化趋势基本相同,相对湿度的日变化趋势和大气温度的变化趋势正好相反,和光量子通量密度的变化趋势相反。沟谷湿地的同样具有小气候效应。

The climatic effect of Carex. meyeriana mire in the Changbai Mountain valley

The environmental effect of mire is the key for understanding ecological function of mire and it has been studied for a long time,especially for the mire in Sanjiang Plain;however,the similar research on the valley mire in Changbai Mountain was lacking.This research investigated the climatic effects caused by typical vegetation in Changbai Mountain via studying its meteorological factors,and we also studied the hydrological-thermal dynamics that is useful for protection and utilization of natural resources in the region.The Changbai Mountain mire wetland possesses cool effects as same as that of the Sanjiang Plain.The thoroughly thawing time for the studied region is one month ahead of the Sanjiang Plain,the transpiration reaches its peak at July and August with the rate of(H2O) 100~140 mol/(m2.s).The photon flux density shows positive correlation to humidity.The diurnal variation of air temperature is similar to leaf temperature;the diurnal variation of relative humidity is negatively correlated to air temperature and photon flux density.The micro climatic effect of mire wetland in the region was also observed with obvious effects.