科研之友
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摘要
Natural factors and socio-economic development have a profound impact on the supply and demand of regional ecosystem services, leading to imbalance of regional ecological service supply and demand. This study aims to analyze the pattern of supply-demand of ecosystem services in Gansu Province, and to explore their internal relationship under social and economic development. In this study, the evaluation matrix of regional supply and demand of ecosystem services was used to calculate the supply and demand intensity. The supply-demand index was introduced to represent the matching status of ecosystem services. The impact of both natural and socio-economic factors on the supply-demand index of ecosystem service was studied by using geographical detector, revealing the spatiotemporal changing patterns of supply and demand. Our results show that: the spatial distribution of ecosystem supply-demand index is obviously inhomogeneous in Gansu Province, especially in the central and southern parts of Gansu Province, characterized by high supply-low demand and low supply-high demand, with the strongest mismatch observed in the central region of Gansu Province. Although this situation has been gradually mitigated since 2010, the discrepancy between supply and demand is still prominent in this region; From the perspective of trade-off and synergy of ecosystem services, there are many trade-offs between supply services, regulatory services and cultural services at the service supply side, while the synergy relationship is mainly found in regulatory services; on the service demand side, there is a synergy relationship between demand services and supply services, and the strongest synergy relationship is observed between supply services and other services. There is a trade-off relationship as well as a synergy relationship between the supply and demand indices of ecosystem services, whereas there is a trade-off relationship between demand and the supply-demand index of ecosystem service; The q value of annual precipitation and vegetation types is more than 50% on the impact of ecosystem services supply intensity, which is the main reason for the spatial differentiation. The population has the highest explanatory power on the demand intensity of ecosystem services, and the q value is more than 40%. In terms of the impact on the supply-demand index, the population in the socio-economic factors and the precipitation in the natural factors have the highest explanatory power, and the q value is more than 35%. The impact of factors on the supply capacity of ecosystem services (demand intensity, supply-demand index) is attributable to a variety of factors, and further enhanced nonlinearly.
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