| In this thesis,the plant species composition,life forms,ecological types,floristic geographical components,plant diversity,relationship between individual community characteristics and geography and climate,similarity of different vegetation types and endemic species were studied and analyzed in The Gaogesitaihanwula National Nature Reserve.The following results were obtained:(1)There were 504 species of plants belonging to 276 genera of 73 families,6 species of ferns belonging to 5 genera of 4 families,5 species of gymnosperms belonging to 5genera of 2 families,493 species of angiosperms belonging to 266 genera of 67 families,405 species of dicotyledons belonging to 217 genera of 58 families,and 153 species of newly recorded plants were found in the reserve.More than half of the families in the autonomous region are found in the protected areas.There are 4 kinds of wild plants under state key protection in the reserve.(2)504 species of plants in the reserve belong to 455 mesophytes,35 xerophytes,13 hydrophytes and 1 aquatic plant.The faunal geographical components were classified into15 species,with east Asian components accounting for the largest proportion.(3)Patrick richness index(R),Simpson diversity index(D)and Shannon-Wiener index(H ’)of different life types were herbaceous > shrub > tree.Pielou evenness index(J)was shrub > herb > tree.The Simpson index(D)and Shannon-Wiener index(H ’)(P < 0.01)were positively correlated with the growth indices and environmental factors.The most significant negative correlation was between wind speed and Pielou evenness index(J)(P< 0.01).(4)Among different vegetation types,Patrick richness index showed broadleaved forest > coniferous and broad-leaved mixed forest > artificial forest = broadleaved shrub,shrub layer showed grassland > broadleaved shrub > broadleaved forest > meadow >artificial forest = swamp,and herb layer showed artificial forest > grassland > meadow >swamp > broadleaved shrub > broadleaved forest > coniferous and broad-leaved mixed forest.Simpson diversity index in the tree layer is broadleaved forest > coniferous and broadleaved mixed forest,shrub layer is meadow > grassland > broadleaved shrub >broadleaved forest,and herb layer is marsh > grassland > artificial forest > meadow >broadleaved forest > broadleaved shrub > coniferous and broadleaved mixed forest.Shannon-wiener index showed broadleaved forest > coniferous and broad-leaved mixed forest at tree layer,meadow > grassland > broadleaved shrub > broadleaved forest at shrub layer,and swamp > artificial forest > grassland > meadow > broadleaved forest >broadleaved shrub > coniferous and broad-leaved mixed forest at herb layer.The Pielou evenness index in the tree layer was broadleaf forest > conifer and broadleaf mixed forest,shrub layer was meadow > broadleaf forest > grassland = broadleaf shrub,and herb layer was marsh > broadleaf forest > conifer and broadleaf mixed forest > grassland > broadleaf shrub > meadow > artificial forest.(5)The Jaccard similarity index of broadleaf shrub and grassland was the highest,which was medium dissimilarity,while the other vegetation types were very dissimilarity.(6)The number of endemic species in the community was broadleaved forest >artificial forest > grassland > broadleaved shrub = meadow > coniferous and broad-leaved mixed forest = swamp. |
PDF Full Text Request