湖北林业科技

In order to investigate the forest community before tending. In this study, 6 common forest communities 》 woody plants were investigated in sushansi Forest park of Huangpi District, then the plant diversity and community struc- ture were analyzed. The areal-type of pantopic and North Temperate for the family and the genera were more than 50% , showing obvious transition . The shannon-weiner index and simpson index of shrub layer and seedling layer were higher than that of tree layer, and the diversity of seedling layer was the highest in several plots . Compared with shrub layer and seedling layer, the dominant species in tree layer showed a higher similarity. Hierarchical clustering method can better in- dicate the similarity in species diversity and evenness of communities . Unweighted pair-Group Method with Arithmetic mean(UpGMA) was used to cluster the tree layers of 6plots . All plots were divided into two major branches , one branch was deciduous broad-leaved forest composed of Quercus fabri. The other branch was the forest containing cunninghamia lanceolata , which was subdivided into the mixed forest dominated by Quercus variabilis and cunninghamia lanceolata . Compared with the diameter class among plots, the diameter class of Quercus forest appeared obvious discontinuity, which may be caused by man-made logging or natural death of trees during forest succession . The diameter class peak of coniferous forest was generally skewed to the right , indicating that the coniferous forests were generally younger . Finally, it was pointed out that the differences of vegetation type, plant diversity and diameter class should be considered before felling , and the effects of felling on carbon sequestration capacity of forests could be evaluated. Forest tending should take into account the differences of various forest spots and take appropriate action according to their characteristics .