基于能值理论的生态足迹方法改进

生态足迹方法自提出以来受到广泛关注,其缺点也受到一些学者的批评。ZhaoSheng等2005年提出能值足迹法,弥补了生态足迹法以土地生产能力为限制的缺点。论文提出区域能值足迹法,以弥补其改进方法不能够反映区域实际情况和技术进步带来影响的不足。最后,以岷江上游1982到2002年为例应用3种方法进行计算分析。结果表明研究区生态足迹呈缓慢上升趋势,生态足迹方法计算结果<能值足迹<区域能值足迹;生态承载力计算结果显示生态足迹与区域能值足迹方法结果呈平缓下降趋势,而能值足迹方法结果呈不规则变动。区域能值足迹法能够考虑到区域实际情况和技术进步,但它不能完全代替生态足迹方法,将其结合应用将得到更多信息。

Modification of Ecological Footprint Assessment Based on Emergy: A Case Study in the Upper Reach of Minjiang River

Ecological footprint(EF) analysis has gained much attention since developed,but some deficiencies were also criticized.Now,EF has been used in regional ecological carrying capacity and sustainability estimation widely.Zhao Sheng modified EF approach with Emergy theory in 2005,called emergy EF approach,which made up the deficiencies of EF limited with biosphere.However,this article improved the modified method for the deficiencies of the modified approach,which does not consider the local situation and technological advances.Finally,the EF of the upper reach of Minjiang River was estimated based on the three methods from 1982 to 2002.The results demonstrated that the EF of the study area increased slowly.The results of regional EF were greater than that of emergy EF,and that of conventional EF were the least.The ecological carrying capacity with conventional EF and regional emergy EF decreased smoothly,however,that of emergy EF changed irregularly.Although the regional emergy approach overcomes some shortcomings of EF,it can not replace the conventional EF.If the two approaches used together,more information would be discovered.