基于生态系统生产总值核算的习水县生态保护成效评估

本文以国家级重点生态功能区—贵州省习水县为例,探讨以生态系统生产总值(Gross Ecosystem Product, GEP)为手段评估重点生态功能区生态保护成效的应用方法。通过核算习水县2000年和2010年的GEP,分析各生态系统服务价值及其变化特征来获取其生态保护成效。研究结果显示:2010年习水县GEP为223.35亿元,是当年该县国内生产总值(Gross Domestic Product, GDP)的约4倍;2000—2010年,习水县GEP共增加37.87亿元,增幅为20.42%。总体上习水县生态保护成效较为显著。主要表现为在10年间其提供的生态产品以及调节、文化服务的总价值均呈现增长,且林地、草地等重要土地利用类型的面积逐步增加。此外,本文还进一步探究了土地利用变化对生态系统服务价值的影响,以便揭示生态系统服务价值变化的根源,从而可以有效保护生态环境,实现区域经济发展与生态建设相协调。

Assessment of ecological conservation effect in Xishui county based on gross ecosystem product

We considered the key ecological function area Xishui County of Guizhou Province as the study area and discussed the use of Gross Ecosystem Product (GEP) as a method to assess ecological conservation effects in key ecological function areas. By assessing the GEP of Xishui County in 2000 and 2010, we analysed the current and temporal differentiation characteristics of ecosystem service values to obtain the ecological conservation effect. The results indicated that the GEP of Xishui County was 22.335 billion Yuan in 2010, which is about 4 times the county''s gross domestic product (GDP) of the same year; from 2000 to 2010, the GEP increased by 3.787 billion Yuan, with a growth rate of 20.42%. As a whole, the effect of ecological conservation effect in Xishui County is quite remarkable. This can be mainly expressed through increasing values of the amount of ecosystem products and services supplied by Xishui County during the study period (2000-2010). At the same time, the areas of the forestland and grassland of Xishui County have gradually increased. We also explored the effects of land use changes on ecosystem service values, to reveal the causes of changes in these values, which can effectively protect the ecosystems in Xishui County and achieve ecological and economic sustainable development for the region.