摘要:南方丘陵山地带作为"两屏三带"国家生态屏障区之一，发挥着保障华南和西南地区生态安全的作用，优先保护区的选取对区域的生态系统服务提升、生态安全和可持续发展具有重要的意义。以南方丘陵山地带为研究对象，采用InVEST模型和森林游憩模型评估产水量、土壤保持、碳储存、生境质量和生态休闲的空间分布，基于有序加权平均算子（OWA）建立了11种情景，通过对比各情景的保护效率筛选出了优先保护区。结果表明：（1）南方丘陵山地带产水量和土壤保持分布不均，平均产水量1108mm，高值区均集中在中部地区，而东部区域和西部区域的生态休闲较高；（2）研究区固碳能力强，平均碳储量为45.58t/hm²，生境质量良好，平均生境质量为0.75，碳储存和生境质量与土地利用/覆被类型关系密切；（3）情景2的保护效率最优，对产水量、土壤保持、碳储存、生境质量和生态休闲的保护效率分别为1.17，1.89，1.32，1.48，1.18。研究结果可为研究区生态系统服务的提升提供决策支持。



Abstract:As an important part of "two shelters and three belts", the southern hill and mountain belt plays an ecological security role in south and southwest China. Selection of priority protected region is of great importance to the improvement of regional ecosystem services, ecological security, and sustainable development. In this study, InVEST model and forest recreation model were used to evaluate the spatial distribution of water yield, soil conservation, carbon storage, habitat quality and ecological recreation. Eleven scenarios were established by using the Ordered Weighted Averaged (OWA). The results showed that: (1) the distributions of water yield and soil conservation were uneven in the southern hill and mountain belt with an average water yield of 1108 mm, high water yield concentrated in the central region, while the ecological leisure in the eastern region and the western region was relatively high. (2) In the study area, the carbon fixation capacity was strong with an average carbon storage of 45.58 t/hm²; the habitat quality was good with an average habitat quality of 0.75; and the carbon storage and habitat quality were closely related to the land use/cover. (3) Scenario 2 indicated the optimal conservation efficiency, and the conservation efficiencies of water yield, soil conservation, carbon storage, habitat quality and ecological recreation were 1.17, 1.89, 1.32, 1.48 and 1.18, respectively. The results can provide decision support for the improvement of ecosystem services in the study area.





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