将石自然保护区野生寒兰群落物种多样性分析

Analysis of species diversity in the wild Cymbidium kanran community in Jiangshi Nature Reserve

采用典型的样地调查法对邵武市将石自然保护区野生寒兰(Cymbidium kanran)群落结构进行调查分析。结果表明:调查范围内共记录到79种植物,隶属43科64属。从科属构成上看,单种科数最多,有27科,占总科数的62.79%;其次是小型科,中型科仅有2科,保护区内缺乏物种数量较多的大型科。寒兰群落草本物种构成较复杂,其中芒萁(Dicranopteris pedata)的重要值(17.76%)最大,占明显优势地位;其次是淡竹叶(Lophatherum gracile)、里白(Diplopterygium glaucum)、寒兰;植物生长型与群落物种多样性的关系为:乔木层和灌木层的物种丰富度相当,明显高于草本层,物种多样性指数表现出灌木层>乔木层>草本层的规律,均匀度变化规律为灌木层>乔木层>草本层。

Using typical plot survey methods,the community structure of wild Cymbidium kanran in Jiangshi Nature Reserve,Shaowu City was investigated and analyzed.The results showed that a total of 79 plant species belonging to 43 families and 64 genera were recorded within the survey area.In terms of family composition,monotypic families were the most abundant,accounting for 62.79%of the total number of families,followed by small and medium-sized families,with only two large families lacking a large number of species.The herbaceous species composition in the C.kanran community was complex,with Dicranopteris pedata having the highest importance value at 17.76%,indicating its dominant status,followed by Lophatherum gracile,Diplopterygium glaucum,and C.kanran.The relationship between plant growth form and community species diversity showed that the species richness of the arboreal and shrub layers was comparable and significantly higher than that of the herbaceous layer.The species diversity index exhibited a pattern of shrub layer>arboreal layer>herbaceous layer,while the evenness pattern was shrub layer>arboreal layer>herbaceous layer.