Analysis of the vertical structure and importance value of Quercus phillyraeoides community in different districts
Community vertical structure and species importance values are essential characteristics to understand the community, which can reflect the dynamic of species and the succession tendency of communities. The results of this paper show as follows. (1) The vertical structure of Q. phillyraeoides community could be divided into tree layer, shrub layer, herb layer and interlayer, but the structures of herb layer and interlayer were very simple; the height of vertical structure was about 4-7 m, and the canopy of community and tree layer coverage were about 0.6-0.75 and 80％, respectively, which meant the community structure was sparse and gaps existed. It is not the same of the situation of shrub structure in different districts as that of the tree layer. The height of shrub layer was about 1-2 m, and the complexity of species composition and vertical structure were more than that of tree layer. (2)The importance value of individual species indicated that Q. phillyraeoides was dominant species with high value, while other species with less significance than Q. phillyraeoides were subtropical forestry common trees such as Loropetalum chinense, Cyclobalanopsis glauca, Juniperus formosana, Rhododendron mariesii. The importance value in the top 10 of each community occupied the great mass of percentage in the tree layer, which could represent the reality of the structure; the importance value of individual in the shrub layer were not high,which meant the high species diversity in this layer. The importance value of Q. phillyraeoides was lower in the shrub layer than that of other species because of few seedlings, and was beneficial to the community refreshing.
Quercus phillyraeoides community, vertical structure, importance value
国家科技期刊平台
NSTL
万方数据
维普
