灵空山采伐干扰下油松林林间草地物种多样性分析

采用记名样方,对不同采伐方式油松林林间草地群落的草本植物区系及其生态生活型和物种多样性进行了比较分析。结果表明,皆伐后林间草地的草本植物科、属、种数均高于间伐,不同时间间伐的物种数变化不大。在种水平上的区系地理成分都是以温带分布为主和植物生活型以地面芽、隐芽植物为主。皆伐方式下的各生长型种数比间伐方式下多,一年生草本所占比例也较大。不同采伐方式下的水分生态型差异不明显,以中生和旱中生植物为主。重要值统计结果表明,不同采伐方式下草本群落除共优种大披针苔草(Carex lanceolata)、小红菊(Chrysanthemum chanetii)外,均存在不同的优势种。物种多样性指数随采伐方式和时间不同呈现出皆伐＞间伐、采伐晚的＜采伐早的。

Diversity analysis of harvesting on Pinus tabulaeformis inter forest grassland in Lingkong Mountain

By secret plots method, species composition, flora character, living form, growth form, water ecotype and species diversity of harvesting on Pinus tabulaeformis inter forest grassland in Lingkong Mountain were analy. The result indicated that: 1)There is a significant difference between clear cutting and intermediate cutting forest grassland on the geographical composition in the family and species level. The areal types of genera is largely affected by the harvesting time. 2)Therophytes more easily survive in the clear cutting than intermediate cutting forest grassland, cryptophytes may be more suitable growth under the woods environment. 3)The quantity and type of growth and water ecotype are more abundant of clear cutting forest grassland than intermediate cutting. 4)Except Carex lanceolata and Chrysanthemum chanetii, the dominant species in three plots are not the same; Due to the different harvesting time and the degree, species diversity of complex appear: plotⅠ＞plot Ⅲ＞plotⅡ.