【摘要】 研究了分布于神农架南坡的珍稀植物群落的区系及生态学特征。结果表明 :珍稀植物群落中有维管束植物 1 2 6种 ,隶属于 1 0 8属 64科。其中 ,第一批珍稀保护植物 9种 ,占神农架地区珍稀植物总数的 2 7.3% ,珍稀植物群落具温带特性。群落外貌以高位芽为主 ,占65.9% ;叶以中型叶占优势 ,达 62 .7% ;叶质以纸质为主 ,占 84.1 % ;叶型以单型叶为主 ,为83.3% ;叶缘以非全缘为主 ,占 69.8%。群落垂直分层明显 ,可分为乔木层、灌木层和草本层。根据重要值 ,珍稀植物群落可分为 3种类型 ,连香树 +涓毛绸李群落、珙桐 +木姜子群落、涓毛绸李 +地锦槭群落。不同珍稀植物群落乔木层物种多样性变化较小 ,均匀度值较高 ,表明珍稀植物群落结构的复杂性和群落发展的相对稳定性。更多还原

【Abstract】 Flora and ecological features of endangered plant communities distributing in Songziyuan,southern slope of Mt.Shennongjia are studied in the paper.The results show that there are 126 vascular plant species,belonging to 108 genera 64 families in the communities and 9 endangered plant species,accounting for 27 3% of the total amount of endangered plant in Mt.Shennongjia.The communities have temperate character.In physiognomy of community,phanerophytes dominated in life form,is 65 9%;mesophyll in leaf form is 62 7%;herbaceous in leaf texture is 84 15;simple leaf is 83 3%;unentire leaf in leaf margin is 69 8%.Communities have a distinct stratification which can be divided into three layers.Communities can be recognized as three types according to value of importance of species:com.Cercidiphyllum japonicum+Padus wilsonii,com.Davidia involucrata+Litsea pungens,com.Cercidiphyllum japonicum+Acer mono.The index of species diversity of tree layer have little change among communities and evenness are high.The results indicate that the communities have complex structures and now are the relative stabilities.更多还原