Characteristics of Vegetation Communities of the Main Forest Types in Nanji Island, Zhejiang Province
The community characteristics of Acacia confusa forest,natural secondary broadleaved forest,Pinus thunbergii forest and Casuarina equisetifolia forest in Nanji Island were studied.The results showed that 1) the ranges of average DBH,average height,density,and volume of four forest types were 16.19-19.74 cm,9.95-11.47 m,496-706 stems per hectare,and 91.42-131.49 m3 per hectare,respectively.2) The top 4 important values of each forest community occupied the great mass of the percentages in the tree layer.The dominant species in tree layer for 4 forest types were A.confusa,C.equisetifolia,Mallotus japonicus,Sapium sebiferum;Melia azedarach,Sapium sebiferum,Ficus virens,Euodia fargesii;P.thunbergii,M.japonicus,A.confusa,C.equiseti folia;C.equisetifolia,A.confusa,M.azedarach,and Clerodendrum trichotomum.The main dominant species in shrub layer for 4 forest types were Eurya emarginata,E.japonica,Pittosporum tobira,M.japonicus,Schef flera octophylla,F.erecta var.beecheyana,Clerodendrum trichotomum.The main dominant species in herb layer for 4 forest types were Miscanthus floridulus,Boehmeria nivea,Setaria viridis,Humulus scandens,S.f aberi,Artemisia lavandulaefolia,Dianella ensifolia,Physalis angulata.3) The order of species abundance for all forest types without Acacia confusa forest was herb layer＞shrub layer＞tree layer.The Shannon-Wiener index,ecological dominant index,evenness of 4 forest types were ordered respectively as follows:herb layer＞shrub layer＞tree layer,tree layer＞shrub layer＞herb layer,shrub layer＞herb layer＞tree layer.
国家科技期刊平台
NSTL
万方数据
维普
