In order to understand the structure of shrub communities and vegetation landscape in the Kongtong Mountain in different habitats,by using the line transect method,shrub communities and composition in the Kongtong Mou...In order to understand the structure of shrub communities and vegetation landscape in the Kongtong Mountain in different habitats,by using the line transect method,shrub communities and composition in the Kongtong Mountain were fully investigated,and the relationship between shrub communities and ecological environment,the community composition,structure,and vegetation landscape and succession of shrub communities in various habitats were systematically analyzed. The results showed that there were 142 species of shrubs,sub-shrubs and woody vines in the Kongtong Mountain,belonging to 75 genera,39 families. Except only two species of plants belonging to one genus,one family were gymnosperms,other species were angiosperms. Various shrub species had some spatial distribution characteristics,and their vertical distribution had certain hierarchy with the change of altitude. In the four conditions of slope direction,shrub community composition was different. There were 12 tree species in shrub communities on sunny slopes,and the constitutive species was S. davidii（ Franch.） Skeels. There were 14 tree species in shrub communities on semi-sunny slopes,and the constitutive species was H. rhamnoides Linn. There were 12 and 15 tree species in shrub communities on semi-shady and shady slopes,and the constitutive species was O. davidiana Decaisne. In the absence of external disturbances,the succession of shrub communities in the Kongtong Mountain began in bare wasteland and experienced natural grassland,mixed shrubs and grass,shrub community and sub-shrub community（ single dominant communities） during the period. Finally,shrub communities evolved into arbor communities.展开更多
基金Supported by Water Conservancy Research and Promotion Plan Project of Gansu Province(GSKF[2008]114)
文摘In order to understand the structure of shrub communities and vegetation landscape in the Kongtong Mountain in different habitats,by using the line transect method,shrub communities and composition in the Kongtong Mountain were fully investigated,and the relationship between shrub communities and ecological environment,the community composition,structure,and vegetation landscape and succession of shrub communities in various habitats were systematically analyzed. The results showed that there were 142 species of shrubs,sub-shrubs and woody vines in the Kongtong Mountain,belonging to 75 genera,39 families. Except only two species of plants belonging to one genus,one family were gymnosperms,other species were angiosperms. Various shrub species had some spatial distribution characteristics,and their vertical distribution had certain hierarchy with the change of altitude. In the four conditions of slope direction,shrub community composition was different. There were 12 tree species in shrub communities on sunny slopes,and the constitutive species was S. davidii（ Franch.） Skeels. There were 14 tree species in shrub communities on semi-sunny slopes,and the constitutive species was H. rhamnoides Linn. There were 12 and 15 tree species in shrub communities on semi-shady and shady slopes,and the constitutive species was O. davidiana Decaisne. In the absence of external disturbances,the succession of shrub communities in the Kongtong Mountain began in bare wasteland and experienced natural grassland,mixed shrubs and grass,shrub community and sub-shrub community（ single dominant communities） during the period. Finally,shrub communities evolved into arbor communities.
