鄂西北中山落叶阔叶林群落特征

对鄂西北中山地带典型落叶阔叶林进行样地调查,分析了其群落特征。对群落内物种组成和群落结构的研究表明:群落内物种丰富,科属组成分散。11个样地中共有维管束植物74科142属222种。从属的地理成分来看,以温带分布的类型占优势。按Raunkiaer生活型统计,群落的生活型以高位芽植物为主,占60.81%。群落叶的性质以中型叶、单叶、纸质、非全缘为主,各占63.51%、80.63%、62.61%、69.37%。群落成层现象明显,可分为乔木层、灌木层和草本层3个层次。总的来说,区系组成和群落外貌结构均体现了亚热带北缘中山落叶阔叶林的特征。

Community characteristics of the mid-montane deciduous broad-leaved forest in Northwest Hubei

Based on sample plot survey, the community characteristics of the mid-montane typical deciduous broad-leaved forest in Northwest Hubei were analyzed. The research of community species composition and community structure showed that, there were various plants in the community, and its family and genus were of scattered composition. In 11 sample plots, the 222 species of vascular plants belonging to 74 families and 142 genera were recorded. In terms of genus geographical elements, most of them were distributed in temperate zones. According to Raunkiaer＇s statistics of life-form, the phaenerophytes were the most abundant in this community, accounted for 60. 81% of total life-form. The leaf characteristics were mostly medium-sized, simple, papery and un-entire, which accounted for 63.51%, 80. 63%, 62. 61% and 69. 37% respectively. As the structure of the stand, there were three layers, namely arbor layer, shrub layer and herb layer. In a word, the floristie composition and structure of this community performed the characteristics of subtropical north-fringe mid-montane deciduous broad-leaved forest.