湖泊生态系统健康定量评价方法

A quantitative method for assessing lake ecosystem health

提出了湖泊生态系统健康定量评价的一种新方法生态系统健康指数法。该方法首先设计了一个0～100的生态系统健康指数作为定量尺度,然后通过评价指标选择、各指标生态系统健康分指数计算、各指标权重计算、生态系统健康综合指数计算等基本步骤,评价湖泊生态系统健康状态。以实用实例对意大利西西里湖泊群及单个湖泊进行了生态系统健康评价。结果表明,该方法原理简单,计算简便,结果可靠、直观,既可用于同一湖泊又可用于不同湖泊生态系统健康状态的定量评价与比较,是一种值得推广的定量评价方法。

A quantitative method, Ecosystem Health Index (EHI) for assessing lake ecosystem health has been proposed in this paper, based on data from 30 lakes in Italy. The method were three major steps. Firstly, a numerical EHI in a scale of 0 to 100 was developed. Secondly, in order to calculate the specific and synthetic EHI, phytoplankton biomass (BA) was selected to serve as a basic indicator, while zooplankton biomass (BZ), the ratio of BZ to BA (BZ/BZ), exergy and structural exergy were used as additional indicators. Thirdly, the specific and synthetic EHI were calculated. The quantitative assessment results for lake ecosystem health could be obtained according to the synthetic EHI values. The EHI method was successfully applied to the assessment and comparison of ecosystem health for Italy lakes. The results show that the EHI method is a valuable method with the advantage of uncomplicated principle, handy calculation, reliable and intuitionistic results.It can be widely used for the quantitative assessment and comparison of ecosystem health states for single and different lakes.