Abstract
Rapid urbanization development and construction has seriously threatened the connectivity of habitat patches in cities and hindered the construction of ecological networks in highly urbanized areas. Among them, China is affected by early compressed urbanization, and the broken ecological space in cities and towns has attracted the extensive interest of researchers. To avoid the subjective randomness and single analysis of ecological space in urbanization areas, this paper takes the central urban area of Wuhan as the main research area. It comprehensively evaluates the ecological network space by combining the MSPA-MCR model. The main conclusions are as follows: (1) Identifying the ecological landscape types with important ecological significance in the study area: Core (88.29%), Islet (0.25%), Perf (0.63%), Edge (9.74%), Loop (0.22%), and Bridge (0.14%). Through the dPC landscape index, seven important ecological sources south of the middle reaches of the Yangtze River were identified. (2) According to the comprehensive factors of natural and human factors constructed by the MCR model, the minimum cumulative ecological resistance surface was established, with an average value of 2.65, a maximum value of 4.70, and a minimum value of 1.00, showing a trend that the ecological resistance values in the central and eastern parts are lower than those in the western part. (3) According to the standard deviation ellipse, the distribution direction of NE–SW in ecological sources was analyzed. The ecological sources distributed in the north were less, and the spatial distribution was scattered on the whole. The strong global positive correlation and local spatial aggregation characteristics of ecological resistance surface were evaluated according to spatial autocorrelation. Based on the gravity model, the interaction intensity of ecological corridors between source areas was evaluated, and the importance of ecological corridor protection and restoration was quantitatively analyzed. The research results provide scientific and reasonable references and a basis for ecological planning of Wuhan central city.
Highlights
IntroductionMore than 50% of the world’s population currently lives and works in urbanized areas, and the number of such migrations will continue to increase in developing countries [1,2]
Different from the previous direct and comprehensive methods, we used land-use data based on the morphological spatial pattern analysis (MSPA) method, image processing, and morphological analysis to identify the ecological source of the central urban area of Wuhan, and extract habitat patches that play an essential role in connecting the landscape at the pixel level [21]
Aiming at the key problem of quantitatively constructing and evaluating the ecological source and ecological network, MSPA-minimum cumulative resistance (MCR) model were used to provide a scientific basis for the planning scheme of protecting ecological patches and focal-species living environment in the city
Summary
More than 50% of the world’s population currently lives and works in urbanized areas, and the number of such migrations will continue to increase in developing countries [1,2]. It is predicted that 65% of the population will live in urban areas by 2025 [3]. The environmental landscape patches show significant fragmentation characteristics [5,6]. At present, this has posed significant challenges and threats to the protection of biodiversity, the maintenance of ecosystem stability and operational security [7,8,9], and reduced the local climate suitability and quality of life [10,11,12]
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