青海湖湿地生态系统能值分析研究

应用Odum H.T.创立的生态经济系统能值理论与方法,对青海湖湿地生态经济系统进行估算和分析。结果表明,水禽和鱼类太阳能值居首位,能值分别为1.10×1024sej和2.94×1023sej,其能值货币价值分别为1.37×1010＄和3.66×109＄,两者之和占系统总能值的90%以上,是系统的主要产出项;其次为再生能源,总能值为1.96×1022sej,能值货币价值为2.45×108＄;资本投入/产出比能值为1.87×1022sej,能值货币价值为2.32×108＄。能值分析结果表明,应在有效保护和合理利用青海湖湿地生态服务价值的前提下,重点保护青海湖湿地水禽和鱼类资源。此外,今后应大力发展青海湖湿地生态旅游并加强科学研究,提高其资本投入/产出能值。

An Emergy Analysis of the Wetland Ecosystem in Qinghai Lake

Based on the theory and method of Energy Analysis originated by H.T.Odum,the typical wetland of Qinghai Lake was studied.With the method of energy analysis,the value of renewable energy was estimated at 1.96×1022 sej,with a monetary value of $ 2.45×108.The energy value of capital input/output was 1.87×1022 sej,with a monetary value of $ 2.32×108.The energy value of waterfowls was 1.10×1024 sej,with a monetary value of $ 1.37×1010.The energy value of aquatic product was 2.94×1023 sej,with a monetary value of $ 3.66×109.It is clear that the total energy value of waterfowls and aquatic products exceeded 90%,the highest in the entire ecological system of Qinghai Lake wetland.The result indicated that emphasis should be placed on protection of waterfowl and fish resources of Qinghai Lake under the condition of effective protection and rational utilization of the values of ecological service of Qinghai Lake wetland.Furthermore,intensified development of ecological tourism and strengthened scientific research should be a key direction in future.