The Study On Plant Diversity And Vegetation Restoration Of Southern Regional In Dongguan Dalingshan Forest Park

Urban Forest Park waspublic park with ecosystem service and located in the city,it is based on forest protection.South China has more Urban Forest Park,and most of themwastransforma from tree farm.The study of vegetation transformation was very important,but there was less research on the plant diversity in Urban Forest Park ofsouth China.In this study,Dongguan Dalingshan Forest Park was use the research object,through the field investigation to research the plant community structure in different transformation vegetation types of Urban Forest Park,and using the ecology research methods to analysis plant community structure and plant diversityof these different vegetation reconstruction mode,in order to provide a theoretical reference value for the Urban Forest Parkconstruction in the South China even thenationwide.The major results were higt-lighted below:1.There are 42 families,79 genera,99 species of plants in 8 sample plots of Dalingshan Forest Park,its coverage was less then all of Dalingshan Forest Park plant species,but the large proportion of genera and species show that the genetic diversity of large.In plantcomposition,the plant speciesof secondary forest intercropping sample plots was higher than that of plantation forest intercropping plots,and plant species of plantation intercropping without intermediate cuttings waslowest.The tree layer of 5secondary forest intercropping sample plots with native plants,likes Schima superba,Euodia meliifolia and Cinnamomum camphora,and its plant important value was uniform distribution.The tree layer of3 plantation forest intercropping samples plotswere mainlywithtwo introduced plants,Acacia mangiumand Eucalyptus citriodora,and its plant important value wasconcentrate,indicating that human factors seriously affect the composition of plant communities,and the dominant tree species of plantation forestwere single.The shrub layer of 8 sample plotswere mainlywith Psychotria rubra,Litsea rotundifolia,Ficus hirta,Ilex asprella,and there haverich plant species.The tree layer coverage of secondary forest higher thanplantation forest,and lowest tree layer coverage ofplantation intercropping without intermediate cuttings was lowest.2 The diversity index Shannon-Wiener of 8 sample plots was at a low level,and were lower than 3,the herb layer was less than 2,that indicating the plant diversity level of Dalingshan Forest Park was low.The Shannon-Wiener index and Simpson index of the shrub layer was maximum in the 3 plant layer,and the richness index was higher thanthetree layer and herb layer,and ecological dominance was lower than the tree layer and herb layer,the reason may be shrub layerplant was low of human influence,and had hight self renewing ability.The Shannon-Wiener index,Simpson index and richnessindex of tree layer in secondary forest was higher thanplantation forest,and shrub layer Shannon-Wiener index,Simpson index and richness indexis slightly higher thanplantation forest,and plantation intercropping without intermediate cuttings was lowest,showed that the plantdiversity of plantation intercropping without intermediate cuttings was low.The ? diversity index(S?rensen index and Jaccard index)showed the similarity between the two communities,and low similarity of communities were abundant plant diversity.S?rensen index and Jaccard index of 8 samplesplots was lower,it showed that the compostion of soecies between every community are more difference in this region,thus shall benefit to the plant diversity level rise in the region.3.According to the plant community investigation and plant diversity analysis result,proposed a optimize strategy to the community structure transformation,includingnatural succession without human intervention,plantation intermediate cuttings and intercropping.At the same time,according to the specific plant community structure of the 8 communities,tproposed the diversity transformation strategy of each community.