Abstract:

 As an important component of urban green space system and space carrier of park city construction, urban parks play an important role in ecological and social benefits in high-density downtown. However, as one of the core indicators for ecosystem function and ecological pattern, landscape connectivity is rarely examined in urban parks. Using remote sensing image data of 2015, based on the Morphological Spatial Pattern Analysis (MSPA) and landscape connectivity index analysis, we evaluated the structural connectivity and functional connectivity of 32 main urban parks in the downtown of Chengdu. The aim of this study was to further optimize the overall ecological pattern of the city, improve the urban living environment, and promote the park city construction in Chengdu. The results showed that the overall landscape matrix of the urban parks behaved well. The top three mean proportions of network structure elements were the large core (48.15%), the edge (23.36%), and the bridge (10.83%). The parks were diverse in composition characteristics. Compared with corridors, urban parks had obvious advantages in patch elements. The classification results of dIIC value showed significant spatial distribution differences in the importance of landscape connectivity among urban parks. Urban parks were dependent on each other with respect to structural connectivity and functional connectivity. It is recommended to strengthen the protection of important patches and parks between the 3rd ring road and the 4th ring road, pay attention to the transition and connection of large, medium and small cores inurban parks, and improve landscape connectivity of urban parks in combination with relevant strategies and actions.

Key words: landscape architecture, landscape connectivity, morphological spatial pattern analysis, importance index of patch connectivity, high-density downtown of city.