京津冀地区土地利用变化对生态系统服务价值的影响

IMPACT OF LAND USE CHANGE ON ECOSYSTEM SERVICE VALUE IN BEIJING-TIANJIN-HEBEI REGION

关键词:  土地利用变化生态系统服务价值土地利用强度敏感性分析京津冀地区

Key words:  land use change  ecosystem service value  land use intensity  sensitivity analysis  Beijing-Tianjin-Hebei region

摘要:

［目的］文章旨在研究京津冀地区各城市生态系统服务价值的时空差异，为京津冀地区土地利用与生态环境保护提供参考。［方法］计算土地利用动态度和土地利用强度指数，构建生态系统服务价值模型，分析生态系统服务价值对土地利用强度的敏感性。［结果］（1）2000～2015年期间，北京市以林地和建设用地为主，天津市以耕地和建设用地为主，河北省以耕地和林地为主； （2）京津冀地区生态系统服务价值从2000年的4 49805亿元增加到2005年的4 65565亿元， 2015年下降到4 54764亿元，其中，天津市、唐山市、沧州市和廊坊市的生态系统服务价值下降幅度较大，分别为716%、158%、762%和1473%； （3）土地利用强度的变化对城市的生态系统服务价值影响较小，生态系统能够适应目前土地利用的变化。［结论］应该根据京津冀地区城市特点，制定差异化政策，优化土地利用结构，实现土地资源的可持续利用。

Abstract:

This paper discussed the spatial-temporal differences of urban ecosystem service value in order to provide reference to land use and ecological environmental protection in Beijing-Tianjin-Hebei region.Dynamic land use degree and land use intensity index were calculated, ecosystem service value model was constructed, and the sensitivity of ecosystem service value to land use intensity was analyzed in our study. The results showed that (Ⅰ) From 2000 to 2015, there were mainly forest land and construction land in Beijing, cultivated land and construction land in Tianjin, and mainly cultivated land and forest land in Hebei Province. (Ⅱ) The value of ecosystem services in Beijing-Tianjin-Hebei region increased from 449.805 billion RMB in 2000 to 465.565 billion RMB in 2005, and dropped to 454.764 billion RMB in 2015.The value of ecosystem services in Tianjin, Tangshan, Cangzhou and Langfang decreased by 7.16%, 15.80%, 7.62% and 14.73%, respectively. (Ⅲ) The change of land use intensity had little effect on the urban ecosystem service value, and the ecosystem can adapt to the current land use change. Therefore, we should formulate differentiated policies and optimize the land use structure based on the characteristics of Beijing-Tianjin-Hebei region, in order to achieve the object of the sustainable use of land resources.