武夷山黄溪洲常绿阔叶林植物多样性及群落结构特征分析

Structure and Species Diversity of Natural Forest of Evergreen Broad-leaved Forest in Huangxizhou Area of Wuyi Mountain

采用相邻格子法对武夷山黄溪洲常绿阔叶林植物多样性进行调查,分析该群落植物组成及群落植物多样性。结果表明:该群落分层明显,草本层和层间植物种数较少,共有维管植物41科63属116种,乔木层、灌木层和草本层分别有39、66和11种。乔木层重要值排名前5的植物为少叶黄杞(Engelhardtia fenzlii)、甜槠(Castanopsis eyrei)、赤楠(Syzygium buxifolium)、米槠(Castanopsis carlesii)和小叶青冈(Cyclobalanopsis myrsinifolia);灌木层重要值前5位的植物为箬竹(Indocalamus tessellatus)、少叶黄杞、黄丹木姜子(Litsea elongata)、赤楠和绒毛润楠(Machilus velutina);草本层重要值前5的植物为里白(Hicriopteris glauca)、狗脊(Woodwardia japonica)、常春油麻藤(Mucuna sempervirens)、莎草蕨(Schizaea digitata)和长序链珠藤(Alyxia yunkuniana)。灌木层数量、多样性指数和丰富度指数均居首位;乔木层和灌木层优势种突出,植物种分布不均匀;草本层植物种数少,均匀度指数最大。

The plant composition and plant diversity of the community for evergreen broad-leaved forest in Huangxi Island,Wuyi Mountain were analyzed by adopting the adjacent grid method.Results shows that the community has obvious stratification,with fewer species of herbaceous and interlayer plants.There are 116 species of vascular plants in 41 families,63 genera,and 39,66,and 11 species in the tree layer,shrub layer,and herb layer,respectively.The top five plants with tree layer importance are Engelhardtia fenzlii,Castanopsis eyrei,Syzygium buxifolium,Castanopsis carlesii&Cyclobalanopsis myrsinifolia;the shrub layer whose important value being the top five plants are Indocalamus tessellatus,Engelhardtia fenzlii,Litsea elongata,Syzygium buxifolium and Machilus velutina;the top five plants with herbaceous importance value are Hicriopteris glauca,Woodwardia japonica,Mucuna sempervirens,Schizaea digitata&Alyxia yunkuniana.The number of shrub layer,diversity index and richness index all rank first;the dominant species in the arbor layer and shrub layer are prominent,and the distribution of plant species is uneven;the number of plant species in the herb layer is small,and the evenness index is the largest.