Abstract:

Background & Aims: Protecting urban biodiversity and creating biodiversity habitats in cities is an important challenge for urban sustainable development. The accelerating urbanization process has caused serious impact on biodiversity, and the protection of urban biodiversity is becoming increasingly urgent in the new urbanization and ecological construction. As a mode of urban biodiversity conservation, it is of great significance to clarify its mechanism and effect of biodiversity conservation in high-density cities and explore its scientific construction and management mode of habitat gardens.

Methods: This study conducted case analysis, investigated the status quo of biodiversity, residents' participation in construction and use and management mode of habitat gardens in Changning District, sorted out and analyzed the distribution status quo of green patches, habitat conditions before and after the construction of habitat gardens, and the promotion effect and completion effect of the policy in Changning District, Shanghai. The model of community scale biodiversity conservation under the background of community renewal in high-density cities was discussed, and the corresponding biodiversity conservation strategies were proposed.

Results: We found that a habitat garden is a natural succession ecosystem with low maintenance management. As the basic unit of urban green space, it not only fills the gap of urban small-scale biodiversity conservation, but also has spatial heterogeneity, which plays an important role in improving urban green ecological network and optimizing biodiversity conservation patterns. However, there are still some problems in habitat garden such as difficult entry into knowledge and technology and large capital input. There are four main modes of construction and management for biodiversity conservation in a habitat garden: (1) Process management includes four main stages: the early site selection, determination of biodiversity protection objects, construction and maintenance management; (2) Pluralistic cooperation: multi-subjects of government, society, enterprises, and individual residents form a task-oriented cooperation mode; (3) Promotion mode with expanding influence; (4) Take countermeasures against potential problems in habitat gardens.

Suggestions & Perspectives: We suggest that in future urban construction and urban renewal planning, habitat construction and biodiversity conservation should be included, and the basic ecological unit of urban community habitat garden should be built. According to the four construction and management modes, habitat garden should gradually become the solution of biodiversity conservation at the scale of urban community.

Key words: high-density city, biodiversity conservation, community scale, habitat garden, community renewal