北京市生态涵养区生态系统服务供给与流动的能值分析

马程, 王晓玥, 张雅昕, 李双成

Emergy analysis of ecosystem services supply and flow in Beijing ecological conservation area

Cheng MA, Xiaoyue WANG, Yaxin ZHANG, Shuangcheng LI

图2 生态—经济系统能值图

Fig. 2 Emergy diagram of ecological-economic system