Subjects: Geosciences >> Geography submitted time 2024-04-29 Cooperative journals: 《干旱区研究》
Abstract： This study is based on the integrated valuation of ecosystem services and tradeoffs model, which quantifies the supply and demand of ecosystem services. This model uses root-mean-square deviation to quantify the intensity of tradeoffs in ecosystem services and analyze the driving factors of tradeoff intensity using a structural equation model. Results show that from 2000 to 2020, the tradeoff intensity of water yield (WY) and soil conservation (SC), as well as WY and carbon sequestration (CS) supply, increased. However, the demand coordination intensity of WY and SC services, as well as WY and CS services, decreased. Except for WY services, which had a supply–demand tradeoff intensity greater than 0 in 2020, the supply–demand tradeoff intensity for WY, SC, and CS services was less than zero from 2000 to 2020. The tradeoff and synergy of ecosystem services are primarily influenced by natural factors. Evapotranspiration has a positive effect on the tradeoff between water production and SC services, as well as on the tradeoff between supply and demand for water production and CS services. However, it has a restraining effect on the tradeoff between supply and demand for water production services. The proportion of grassland area has a restraining effect on the tradeoff between water production and CS services, as well as on the synergy between water production and SC service demands. In addition, it has a promoting effect on the supply–demand tradeoff of CS services. Precipitation has a restraining effect on the synergy between water production and CS service demands, as well as on the tradeoff between supply and demand for SC services. However, it has a promoting effect on the tradeoff between supply and demand for water production services. Socioeconomic factors have a secondary effect on the tradeoff and synergy of ecosystem services. Population density has a promoting effect on the synergy between water production and soil conservation service demands, whereas it has a restraining effect on the tradeoff between supply and demand for water production services and CS services. Therefore, when developing comprehensive management decisions for river basins, the spatial characteristics and driving factors that contribute to the tradeoff and synergy of ecosystem services must be considered.
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