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[Construction of Wuhan's ecological security pattern under the "quality-risk-requirement" framework]
Long-Yang Huang1, Sheng-Hua Liu1, Ying Fang1
1School of Resource and Environmental Science, Wuhan University, Wuhan 430072, China.
Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|March 28, 2019
Summary
This study develops a new method to identify urban ecological source areas by considering land quality, degradation risks, and human needs. The research establishes an ecological security pattern for Wuhan, crucial for urban planning and ecological integrity.
Area of Science:
- Urban Ecology
- Landscape Ecology
- Environmental Planning
Background:
- Ecological security patterns are vital for urban ecological integrity, but current methods overlook land degradation risks and human needs.
- Effective identification of ecological source areas is crucial for maintaining ecological processes and ensuring urban ecological security.
Purpose of the Study:
- To develop a comprehensive method for identifying ecological source areas in urban environments by integrating land quality, degradation risk, and human ecological demand.
- To construct an ecological security pattern for Wuhan, including ecological source areas, corridors, and pinch points, to guide urban spatial planning.
Main Methods:
- Calculated comprehensive ecological land value considering quality, degradation risk, and demand to identify ecological source areas in Wuhan.
- Constructed ecological resistance surfaces using land use types and nighttime light data, identifying potential ecological corridors with the minimum cumulative resistance model.
- Utilized circuit theory to recognize ecological "pinch points" and established a "four horizontal, three vertical, and ten groups" ecological safety pattern for Wuhan.
Main Results:
- Identified 2138.2 km² of ecological land in Wuhan (24.9% of total area), primarily waters and forests in the north and south.
- Mapped 1222.42 km of ecological corridors (566.75 km aquatic, 655.67 km terrestrial), forming a double cross-shaped aquatic pattern and a circular terrestrial pattern.
- Located 44 ecological "pinch points" distributed around the central city, with existing protected areas largely overlapping identified source areas.
Conclusions:
- The integrated approach provides a robust framework for identifying urban ecological source areas, accounting for critical factors like degradation risk and human demand.
- The established "four horizontal, three vertical" ecological safety pattern for Wuhan offers a quantitative basis for urban spatial planning and ecological conservation.
- This research supports the ecological significance of the identification framework and aids in guiding relevant urban spatial planning for metropolitan areas.