江西三清山浙江楠群落结构与物种多样性分析

Analysis of Structure Features and Species Diversity of Phoebe Chekiangensis Community in Sanqingshan Mountain of Jiangxi Province

在野外样方调查的基础上,通过种类组成、数量特征、垂直结构、物种多样性和种群结构等方面对江西三清山浙江楠群落结构与物种多样性进行了分析,并与浙江杭州浙江楠群落区系和多样性进行了比较,结果表明:1种类组成较丰富,有56科、105属、121种,其中蕨类植物10科、11属、12种,被子植物46科、94属、109种;2生活型多样,有高位芽植物、地上芽植物、地面芽植物、隐芽植物、一年生植物,以高位芽植物占优势,占50.83%;3浙江楠群落垂直结构分明,优势较明显,以幼树占优势,物种多样性指数为草本层>灌木层>乔木层4三清山与杭州云栖、九溪浙江楠群落乔木层优势物种多样性比较,与九溪理安寺浙江楠+毛竹-箬竹群落多样性比较接近.该群落属于不稳定和不成熟的群落,其物种丰富度、多样性和均匀度都较低,生态优势度较高,具有衰退趋势,应加以干预和保护.

Based on field plot survey, Phoebe chekiangensis community species composition, quantitative characters, vertical structure, species diversity and population structure characteristics were analyzed in Sanqingshan Mountain of Jiangxi Province, and floristic and species diversity were compared with that in Jiuxi and Yunxi of Hangzhou City. Results show that： （1）The species composition within the plot are more abundant. There are 121 species, which belong to 105 genera of 56 famities within quadrat. Ferns are 10 famities 11 genera 12 species; angiosperms are 46 famities 94 genera 109 species. （2）There are five kinds of community life forms such as phanerophytes, chamaephytes, hemicryptophytes, cryptophytes and therophytes. Phanerophytes is primary, accounting for 50.83 %. （3）The vertical structure of the community is distinct. Dominant species are more obvious with sapling in a majority. The species diversity index ordered as follows： herbaceous layer 〉 shrub layer 〉 arbor layer. （4）The dominant species diversity of arbor layer in Sanqingshan Mountain are the nearest with the Phoebe chekiangensis ＋ Phyllostachys heterocycla-Indocalamus latifolius Ass. Of Liansi in Hangzhou. The richness index, species diversity index and evenness index within the plot are low, but its ecological dominance index is high. The Phoebe chekiangensis community is unstable and immature. It has a tendency of degeneration and should be protected immediately.