南岳篦子三尖杉群落多样性分析

Analysis of Cephalotaxus oliveri Community Diversity

采用样方法,对南岳境内的野生篦子三尖杉株群结构及物种多样性进行了调查研究。结果表明:在1 500m2样地中,共有维管束植物123种,隶属于69科99属,群落优势科不明显,种类主要集中在单种的科属内。植物生活型谱以小高位芽为主的木本植物占优势,叶的生活期以夏绿叶为主,常绿叶次之,群落外貌较整齐,冠面颜色黄绿色,结构层次明显,群落中乔木种类稀少,个体数较多,优势种为毛竹,灌木层的种类和个体数最多,优势种为篦子三尖杉等。该群落植物区系地理成分较复杂,有13个分布区类型,温带性成分占52.53%,热带性成分占38.38%,说明该群落植物属具有较强的温带性质,并表现出该区域植物从热带向温带过渡的性质。物种多样性分析显示该群落多样性指数不高,各层次的丰富度格局为灌木层>草本层>藤本层>乔木层,多样性格局、均匀度格局和生态优势度局均为藤本层>灌木层>草本层>乔木层。

we adopt quadrat sampling method, made a research focus on the structure of Cephalotaxus ol- iveri community and diversity in Nanyue area： within 1500 square meter, it has 123 species of vascular plants attaching to 69 family 99 genus in total, the dominant families is not obvious, species mainly focus on single genera. In plant life form spectra, microphanerophyte holds the advantage position, the life pe- riod of leaf are mainly summer green leaf, evergreen leaf take second place. The outskirt of community is in good order. The color of canopy is kelly and hierarchical structure is clear. The species of macrophan- erophytes are rare in community, but individual number is numerous. Moso bamboo is the dominant spe- cies. Shrub layer has the most species and individual number, the dominant species is Cephalotaxus oliv- eri and so on. The geographical element of this plant community flora is complicated. It contains 13 dis- tributing type, 52.53% temperate zone and 38.38% tropical zone. It suggests that this plant community has strong temperate zone characteristics, and it shows that this area has a character of transition from temperate zone to tropical zone. Analysis shows that community diversity index is not high. The rank of Margalef index is shrub layer 〉 herb layer 〉 Liana layer 〉 macrophanerophytes layer, the diversity struc- ture and Pielou structure is Liana layer 〉 shrub layer 〉 herb layer 〉 macrophanerophytes.