青岛市三标山林火迹地早期恢复植被特征研究

Vegetation Features of Early Recovery Stage At Burned Areas of Sanbiao Mountain in Qingdao City

以青岛市三标山林火迹地为例,对该地区林火迹地和未过火样地进行对比调查,同时分析火干扰后群落乔木树种个体密度变化情况;火干扰对木本植物幼苗更新的影响;火干扰后群落草本植物的恢复情况。结果表明,火干扰后:大径阶立木的成活率普遍高于小径阶立木;乔木树种个体密度随着火烧强度的增强而降低;豆科、阳性木本植物重要值增加,其在未过火样地、轻度火烧样地、中度火烧样地和重度火烧样地内的重要值分别为0.26、0.28、0.87和0.78。在过火样地内,草本层植物的种类数增加,在重度过火样地内禾本科植物成为群落中的优势类型。

This paper conducted a comparative study on community structure in burned areas and unburned areas of Sanbiao Mountain in Qingdao City. The change of stand density was analyzed within different fire disturbance intensity, and the affects of fire disturbance on regeneration of xylophyta was investigated. In addition, the recovery status of herbs was studied in this paper. According to the research, the survival rate of the bigger trees was larger than that of the smaller trees. After the fire disturbance, the stand density decreased when the fire intensity increasing. The number of xylophyta seedlings regenerated in burned areas was greater more than that of unburned areas, especially in species numbers and coverage. The importance value of leguminous woody plant and helophytic woody plant increased, and it was 0.26 for unburned sample plot, 0.28 for slightly burned sample plot, 0. 87 for moderately burned sample plot, and 0. 78 for heavily burned sample plot, respectively. In burned sample plots, the species of herbs increased, and gramineous plants became dominant groups in heavily burned sample plot.