Subjects: Geosciences >> Geography submitted time 2024-07-04 Cooperative journals: 《干旱区研究》
Abstract： Ningxia is an important region in Northwest China. Thus, it is imperative to study land use change and its impact on ecosystem services to improve the ecological environment of Ningxia and put forward environmental protection measures for the future. However, previous studies have primarily focused on the changes in the ecosystem services during historical periods but lacked a prediction of the ecosystem services and their trade-offs and synergistic relationships under future scenarios. Therefore, this study simulated the land use status under three future scenarios, quantified the four ecosystem services of carbon storage, soil conservation, water yield, and grain yield under the different land use types, an d ascertained their trade-offs and synergies at various spatial scales. The main conclusions are as follows: in the future, the water yield of the three scenarios was lower than that of the current year, and the soil conservation and carbon storage were th e largest in the ecological protection scenario, reaching 7.98×107and 4.72×107tons, respectively. In contrast, the grain yield was the largest in the farmland protection scenario, reaching 1.52×107tons. The trade-off relationship between ecosystem services mainly occurred between the regulating and supplying services and the synergy relationship between the regulating services. At the provincial scale, only carbon storage and soil conservation services demonstrated a high synergistic relationship; at the regional and county scales, the synergy between water yield and carbon storage services was also remarkable.
Subjects: Geosciences >> Geography submitted time 2024-03-01 Cooperative journals: 《干旱区研究》
Abstract： Identifying priority areas for ecological compensation under soil and water conservation is animportant reference for establishing a suitable compensation system to support local ecological development. Inthis study, the Ningxia Hui Autonomous Region is taken as the study area, and the InVEST model is employed toevaluate three major soil and water conservation service functions: water connotation, soil conservation, andcarbon storage. Their respective value amounts were assessed. Additionally, the ecological compensation priorityand ecological vulnerability index of each district and county are considered to conduct a spatial identification ofpriority areas for ecological compensation for soil and water conservation in Ningxia. Research has shown thatthe value of soil and water conservation in Ningxia has steadily increased each decade from 2000 to 2020,reaching 247.89 billion yuan, 266.17 billion yuan, and 295.85 billion yuan, respectively. Geographically, thesouthern regions generally exhibit higher values, whereas the northern regions show lower values, with JingyuanCounty, Guyuan City, and Jinfeng District, Yinchuan City, representing the highest, and lowest values,respectively. Over the years, the priority compensation areas for soil and water conservation have experiencedrelatively minor changes. These areas are mainly located in the southern regions, characterized by high ecologicalvalue but economic backwardness. The secondary priority areas for ecological compensation are located in thecentral and northern regions, characterized by low ecological value but high economic development.Compensating these priority areas can effectively improve the efficiency of ecological compensation, foster theregional ecological environment, and promote sustainable economic, and social development.
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