Study On The Construction Of Green Space Network In Dongshan Island

Today,with the rapid development of urban-rural integration,ecological environmental pressure has gradually become a serious challenge at the present stage.In the face of such a severe ecological and environmental protection problem,China has put forward strict protection requirements for urban green open space,and more emphasis on the upgrading of urban and rural ecological environment,and strive to create a green city.Therefore,taking Dongshan Island as an example,combining the ecological and environmental characteristics and urban development objectives of such island cities as Dongshan Island,this paper constructs the green space network of Dongshan Island in order to protect the biodiversity of the island and connect the broken green space.Increase the connectivity of green landscape,integrate the green space,improve the level of landscape resources in the island to more living things Sample protection is of great significance.The main conclusions of this paper are as follows:(1)In order to explore the way of constructing and optimizing the urban green spatial pattern of Dongshan Island,the research idea of "Spatial pattern Evaluation-Ecological Service function Evaluation-pattern Construction-Spatial Optimization"guided by green spatial network is explored.Taking the construction of green ecological network as the goal and the landscape ecology theory as the guide,starting from the landscape pattern of the city as a whole,the study area is analyzed by multi-level analysis,and the present situation and future development direction of the city are grasped.This paper attempts to construct a green spatial pattern with ecological source-ecological corridor-ecological node as skeleton.(2)The pattern evaluation of the urban and rural landscape types in 2011 and 2017 was carried out.The indexes of three different angles were analyzed by the factor analysis method:the area-density index,the shape index and the dispersion index were analyzed,and the representative index was selected.Two levels of analysis were made from the level of plaque and the landscape level.The results show that the landscape pattern in the island has changed greatly in the past six years.In the forest land,the area of the cultivated land is gradually increasing,the area of the grassland and the water area is suddenly reduced,the area of the construction land is doubled compared with that in 2011,the pace of the urban construction is accelerated,the shape of the patch is high,the breaking degree is on the rise,and the urban development takes the center city The expansion of the area to the periphery of the cultivated land and the increasing degree of the construction land are increasing;the diversity of the whole landscape is reduced,the communication degree of the green space is reduced,the ecological resistance of the exchange between the organisms is increased,and the sustainable development of the stability of the maintenance ecosystem and the urban construction is extremely disadvantageous.(3)The important area of ecological service function of Dongshan Island was comprehensively determined by grading evaluation of important ecological functional areas and ecologically sensitive areas.The important area of ecological service function of Dongshan Island is 7162.83hm2,accounting for 37.44%of the study area.According to the spatial distribution,the areas of Xipu town,Xingchen town,Qianlou town and surrounding area’in the northwest of the study area are more distributed,and the ecological service function is relatively high,especially in the intersection of the three towns,the high important and high sensitive areas are widespread.The framework of Dongshan Island Green Space Network is shared with Chen Town in the south,which lays a foundation for the construction of Green Space Network in Dongshan Island.(4)The morphological spatial pattern analysis method(MSPA),combined with ecological service function evaluation was used to extract the core area and bridge area which were of great significance to the construction of ecological corridor in the study area,and the corresponding landscape index was selected.The minimum path method was used to determine the ecological source of the study area.Based on the method of the minimum path in the cumulative consumption model,the ecological corridor is constructed,and finally the green spatial network pattern of Dongshan Island is formed.On this basis,the countermeasures for the optimization of ecological network are put forward.