黄土高原土地利用变化对生态系统服务价值的影响

The impact of land use change on ecosystem services value in Loess Plateau

深入研究黄土高原生态系统服务价值的时空变化过程、揭示该区域生态环境演变规律,对黄土高原生态环境治理和保护具有重要意义。首先,选取基于生态系统服务价值动态评估模型进行黄土高原生态系统服务价值评估;然后,引入生态系统服务价值变率指数和环境经济协调指数评估黄土高原土地利用变化对生态系统服务价值的影响程度以及生态环境质量与社会经济发展的协调关系。结果表明,2000—2010年间,黄土高原的生态系统服务价值增加了48%,这主要得益于黄土高原综合治理使得区域植被覆盖度提高,生态系统服务功能相应增强;草地变化导致的生态系统服务价值变率最大,为13.45;监测期间,黄土高原的环境经济协调度指数为0.1153,处于低度协调水平。本研究可为黄土高原生态环境治理和保护成效评估提供科学依据。

In-depth study of the spatial-temporal change process of the ecosystem service value in Loess Plateau reveals the evolution of the ecological environment in the region, which is of great significance to the improvement and protection of the ecological environment in Loess Plateau. In this paper, based on comprehensively considering the spatial heterogeneity and temporal evolution of ecosystem service, the authors selected the Loess Plateau ecosystem service value dynamic evaluation model to assess the ecosystem service value in Loess Plateau. The ecosystem service value variability index was used to assess the impact of land use change on ecosystem service value and the environmental economy coordination degree index(CDEE) was used to evaluate the coordinating relationship between eco-environmental quality and social and economic development in Loess Plateau. The results show that, from 2000 to 2010, the ecosystem service value of Loess Plateau increased by 48%. This is mainly due to the desertification control in the Loess Plateau which had led to an increase in regional vegetation coverage and a corresponding increase in ecosystem services. The ecosystem service value change rate in grassland was the highest (13.45). The CDEE was 0.115 3 in Loess Plateau from 2000 to 2010, which was at a low level of coordination. This study can provide a scientific basis for ecological environment governance and evaluation of protection effectiveness in the Loess Plateau.