首页> 中文期刊>生态与农村环境学报 >张承地区生态系统服务及其区域关联分析

张承地区生态系统服务及其区域关联分析

     

摘要

区域生态系统服务及其辐射效应评估能够揭示研究区域生态-经济-社会耦合系统的整体性和关联性特征.基于张承地区2013年遥感影像和生态服务价值化方法,评估分析了该区域地表覆被组成、关键生态系统服务及其对北京市的辐射效益.结果发现,张承地区约97%地表覆被为林草地和农田,是发挥生态屏障功能的主体;该地区自然生态系统可提供的关键生态系统服务价值为l 895亿元·a-1,高值区分布在林草植被集中的承德市以及张家口市的东南部地区;张承地区每年约有21%关键生态系统服务以水和风为介质辐射到北京市,其中,怀来、赤城、宣化、涿鹿、崇礼和沽源等县与北京市的生态系统服务关联度较高,是北京市外来生态系统服务的主要输入区.该研究对于揭示京津冀区域生态系统整体性以及科学构建区域生态修复与合作机制具有一定的参考价值.%The study to evaluate regional ecosystem services and their radiation effects may help exposit the features of integrity and correlativity of the ecological-economical-societal complex system of the studied region.Based on the 2013 landsate remote-sensing images of the Zhangjiakou-Chengde Region and the eco-service valuation method,the composition of the surface land cover and key ecosystem services of the region and their radiation effects on Beijing have been analyzed and evaluated.Resnlts show that about 97% of the land in this region is covered with forests,grasslands and farmlands,which are the mainstay of the ecological protective screen for the Beijing-Tianjin-Hebei Metropolitan Region.The natural ecosystem of the region may provide key ecosystem services,such as water conservation,wind and sand control,carbon sequestration and oxygen release,valuated as high as 189.5 billion yuan RMB in 2013.The high-valued eco-zones are distributed mainly in Chengde,of which the land is mostly covered with forests and grasslands and the southeastern part of Zhangjiakou.Every year,nearly 21% of the key ecosystem services of the Zhangjiakou-Chengde region may render are radiated into Beijing,via water and wind.Within the region,Huailai,Chicheng,Xuanhua,Zhuolu,Chongli and Guyuan counties are more closely related to the ecosystem services of Beijing as major contributors.All the findings of the study may serve as certain valuable reference for future efforts to exposit ecosystem integrity of the Beijing-Tianjin-Hebei Metropolitan Region and to explore scientific mechanisms for eco-remediation and cooperation of the Region.

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