神农架南坡送子园珍稀植物群落的区系及生态特征研究

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１２６种，隶属于１０８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２７．３％，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

STUDIES ON FLORA AND ECOLOGICAL FEATURES OF ENDANGERED PLANT COMMUNITIES IN SONGZIYUAN, THE SOUTHERN SLOPE OF MT.SHENNONGJIA

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.