Abstract
The assessment of ecological security patterns is a topic of conversation in landscape ecology in recent years. However, ecosystem services and human activities are seldom considered comprehensively in the assessment of ecological security patterns. The present study employs the Beijing–Tianjin–Hebei urban agglomeration as a study area, and uses ecological services to determine the ecological sources. The importance of ecological sources is classified based on logical coding and functional types of ecological services. The research combines regional characteristics to select and quantitatively calculate three human disturbance factors: soil erosion sensitivity, geological hazard sensitivity, and night lighting. Then the basic surface resistance of land use to limit migration is modified and ecological corridors are identified by combining these three disturbance factors. The results indicate that the sources of water production, soil and water conservation, and carbon fixation are mainly provided in mountainous areas, recreation sources are mostly distributed in the plains, and these ecological sources improve the maintenance of ecological corridors. The modification of resistance surfaces significantly changes the length of ecological corridors in Tianjin, Tangshan, Cangzhou, and Beijing, and the modified resistance surface improves the recognition of ecological corridors. This study provides a new research framework for identifying the ecological security patterns of urban agglomerations and provides scientific guidance related to ecological protection and urban planning for the Beijing−Tianjin−Hebei urban agglomeration.
Highlights
While urbanization provides beneficial results to modern civilization, it creates a series of ecological and environmental problems, such as the loss of natural landscapes, a decline in ecosystem services, and the aggravation of environmental health risks, which can affect the sustainable development of cities (Han, Liu & Wang, 2015)
Spatial pattern of ecological sources Spatial pattern of ecological services The spatial pattern of a single ecosystem services can reflect the effects of different ecological processes on regional ecological security
Ecological corridors were identified using a minimum cumulative resistance (MCR) model based on sources and resistance surface modified through human disturbance factors
Summary
While urbanization provides beneficial results to modern civilization, it creates a series of ecological and environmental problems, such as the loss of natural landscapes, a decline in ecosystem services, and the aggravation of environmental health risks, which can affect the sustainable development of cities (Han, Liu & Wang, 2015). Establishing an ecological security pattern for urban agglomeration, taking ecosystem services and human interference factors into consideration. The goal of establishing an ecological security pattern is to achieve regional ecological sustainability through integrating landscape patterns with ecological processes while comparing the importance of different landscape patches to specific ecological processes and ecosystem services (Peng et al, 2018d). Documenting ecological security patterns can restrict the expansion of urbanization, regulate ecological processes reasonably, maintain material and energy cycles, strengthen urban ecological health, and promote sustainable urban development (Li et al, 2011)
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