城镇化进程中西南山区生态系统服务权衡特征分析

Trade-off Characteristics of Ecosystem Services in Mountainous Areas of Southwest China in the Process of Urbanization

快速城镇化对山区生态系统服务产生强烈影响,尝试探讨城镇化进程中各生态系统服务之间的关系对于山区的可持续发展具有重要意义。本研究以中国西南地区332个山区县为例,揭示不同城镇化水平区生态系统服务的综合效益以及各生态系统服务之间的权衡特征。研究结果表明:(1)不同城镇化水平区,4种典型生态系统服务存在明显差异;(2)高城镇化水平区与中城镇化水平区产水量与土壤保持、产水量与碳储量、土壤保持与碳储量两两之间的综合效益差异较小,且明显低于低城镇化水平区;(3)产水量与土壤保持两者之间的权衡值表现为:高城镇化水平区>中城镇化水平区>低城镇化水平区,而产水量与碳储量、碳储量与粮食生产两两之间的权衡值表现为:中城镇化水平区>高城镇化水平区>低城镇化水平区。研究结果为中国西南山区新型城镇化与生态环境保护两者的协调发展提供了一定的理论依据。

As rapid urbanization has a strong impact on the ecosystem services in mountainous areas,it is of great significance for the sustainable development of mountainous areas to explore the relationship between the ecosystem services in the process of urbanization.Taking 332 mountainous counties in southwest China as the research objects,this study reveals the comprehensive benefits of ecosystem services and the trade-off characteristics among ecosystem services in areas with different levels of urbanization.The results show as follows:(1)Significant differences are found among the four typical ecosystem services in urbanized areas of different level;(2)Little difference is shown between the comprehensive benefits of water yield and soil conservation,water yield and carbon sequestration,soil conservation and carbon sequestration in the moderately urbanized area(MUA)and highly urbanized area(HUA),which are obviously lower than those in the lowly urbanized area(LUA);(3)The trade-off value between water yield and soil conservation is shown as HUA>MUA>LUA,and the trade-off values between water yield and carbon sequestration,carbon sequestration and food production are both shown as MUA>HUA>LUA.The research results have provided a certain theoretical basis for the coordinated development of new urbanization and ecological environmental protection in the mountainous areas of Southwest China.