81 / 2023-12-29 21:57:32

Ecosystem Service Flows in Ningxia Hui Autonomous Region Based on Supply and Demand Relationships

ecosystem services,ecosystem spply and demand,Ningxia Hui Autonomous Region

8、资源能源安全与应急管理 > 2、生态安全与国土整治

This study investigates the supply-demand dynamics of ecosystem services in Ningxia Hui Autonomous Region, focusing on the operational mechanism of "who supplies, how it flows, and who consumes" these services. Understanding these dynamics is crucial for exploring ecosystem service relationships and underpins ecological management. The research identifies four primary ecosystem services—water yield, soil conservation, grain production, and carbon sequestration—based on regional characteristics, employing modeling and valuation methods to quantify their supply and demand.This paper uses a supply-demand ratio model to assess matching relationships and spatiotemporal differentiation at the county level, aiding in the delineation of input and output areas for ecosystem service flows. It also incorporates physical formulas for fracture points and field strength to calculate service flow range and intensity, providing insights for ecological restoration zoning in Ningxia.Key findings include: (1) From 2005 to 2021, except for a decrease in water yield demand, other primary services showed fluctuating increases in supply and demand. (2) The supply-demand ratio for water yield typically displayed a south-high/north-low pattern in the southern water conservation areas, with stable average ratios over the years. The ratio for soil conservation was consistently positive, supporting an ecological security framework dominated by regional mountain ranges. (3) Water yield output areas concentrated in the south, grain production output areas increased, and carbon sequestration output areas decreased over the period. (4) The radius of water service flow generally increased in southern output areas, while the flow intensity mostly decreased; grain production and carbon sequestration services saw increased radii and flow intensities in most output areas.