| This dissertation expapiate on the connotation of green space, urban landscape,pattern of urban green space and plant community from the aspect of urban green landspace and clarifies the connotation of urban green landspace taxonomic system.And review development History and related research of urban green space structure, characteristics of plant community and plant diversity.The methods about urban green landspace construction has been established,as an example to Luohe uarban,directed by the theory of garden ecological,landscape ecological,and uarban planning,ect.Through these researches, the Relations of landscape pattern , urban green and green plant diversified communities are analyzed.The index of Habitat biodiversity in Luohe are calculated, In order to explore methods of the ecological infrastructure. The plant community charactor of urban green space e are detailed quantitative analyed to measure the scientific nature of the construction of urban green space.In final the method of green space community construction in Luohe is analyzed.Througe these researches ,an approach of urban green space ecological construction has been attained.Number one , This dissertation enrich the connotation of urban green space taxonomic system. The urban green space is the landscape which based on a variety of forms of life. The Urban green space includes the green space in urban and Suburbs area.According to ecological theory, The author believes that the construction of urban green space landscape should base on the urban landscape ecology theory. The urban green space landscape sustainable use should be build,from the several aspects,such as green layout, community size, species, and so on.Number two, according to the resources information that the author obtain from urban green space census in Luohe and the satellite remote sensing image, the author find out the status of green landscape resources in Luohe.Secondly, the author quantitatively calculat the landscape pattern of urban green space landscape,such as landscape features, patch type scale , landscape diversity, fragmentation and affroest index.The result shows that green area in luohe is 1,594.3 hm2, the rate of 37.2% is green parks.The area is 592.7 hm2. there are a large number of big green block. but the green area in park of urban are unevenly distributed. the fragmentation index is large in the downtown area.But in suburbs,there are a large number of good green landscape which are connected into film, as with . The landscape connectivity is higher. according to the size of green , green patch are divided into four types , S<500㎡,500≤S<3000 m2,3000≤S<10,000 m2,10,000m2≤S.The index of landscape diversity were11.23,10.96,8.98,7.54.w Values is greater than the conventional landscape diversity index. The results accord with the laws of landscape ecology.It shows that after construction more than ten years , the diversification trend of urban green patch is clearly. The types of green patch are complete, the type of green is rich in Luohe. this information provide basic for knowing the green space and provides use for reference for scientifically adjusting the pattern of green space landscape pattern in Luohe.Number four,the author analyzes the the relationship between habitat biodiversity and plant biodiversity. investigating the method of green habitat classification unit of Luohe. preliminary studying on the structural characteristics of plant communitiesin urban green space. Compareing the five plant species diversity in Semi-natural and artificial green. he studies suggest that the diversity index of area,linear,p-oint and Plant biodiversity are 2.59,2.06,1.09,2.26,4.55. Green Land Ecosystem in Luohe is devided into 31 habitat unit. Saturation index was first introduced as a quantitative index of coupling relationship of urban green space habitats and plant diversity and illustrate the gap with the greatest possible diversity. Green space plant communities which were composed of 259 vascular plants, belong to 93 section 151 genera. arbor and bushes ratio in different Type of Plant Communities are that 1.16,1.67,0.60. Therefore we propose that the plant communitie species and the total number of species in different area green space get to maximum when it is 1.6 ~ 1.7 hm2. The phaenerophyta is high percentage except G4 in five living form。It shows that most plant communities in Luohe reach maturity. The Type of Plant Communities has complex level and the large number of specie.the order of Shannon-Wiener index in five green is 2.59,1.733,0.682,2.772,2.191.biological diversity pot-ential conditions is its certain level of habitat diversity in urban green space landscape. The more abundant species and the higher the compound extent of degree of communities is, the higher the biodiversities are, the more stable the c-ommunity green space is. When studying on plant diversity,the habitat factors is introduced. It provides a new method of solving similar problems and provide a reference to study on the same scale urban green space.Number four, the dissertation analyzes the patch area scale of simulating natural urban green space. It point out that the area of green community should be more than 0.4hm2 in general. Put forward the problem which should pay attention to on construction simulating natural urban green space community.From the construction of green space biological diversity, the author put forward to select good green space which have a certain size, more perfect community structure,more landscape and ecological benefits, as permanent demonstration area of urban biodiversity conservation.the author prospect the development trend of bird diversity of urban green space in Luohe. The corresponding measures are proposed: in Luohe, the choice of plant species of urban green space, the construction of plant communities and vegetation landscape should based on plants and birds of diversity.The construction of biological diversity of urban green space should be standardized and institutionalized. |
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