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生态服务价值既是实施生态系统保育和管理、建立合理生态补偿机制的基础 ,也是全球经济的重要组成部分。作者根据四川省 1995年森林资源统计资料和其它有关文献 ,按照Costanza的生态服务功能系统初步估算了四川西部天然林生态系统的 17类生态服务价值。川西天然林生态服务功能总价值为 46 84× 10 8USD/a,其中生态效益、经济效益和社会效益分别占 77 5 1% ,17 10 %和 5 39% ,这反映了天然林生态系统具有极显著的生态功能。在生态效益方面 ,气体调节、侵蚀控制和层积物保持、养分循环、废弃物处理价值等生态功能尤其明显。川西天然林生态服务价值占全国总价值的 0 5 2 % ,但气体调节和遗传资源对全国生态服务功能的贡献很高 ,分别为 2 2 5 %和 2 76 %。由于天然林生态系统具有许多不确定性以及方法上的不成熟 ,因而本文得到的川西天然林生态服务价值只是一个保守的、较低的估计值
The value of ecological services is not only the basis for implementing ecosystem conservation and management, establishing a reasonable ecological compensation mechanism, but also an important part of the global economy. Based on the statistical data of forest resources of Sichuan Province in 1995 and other relevant documents, the authors initially estimated 17 types of ecological service values of natural forest ecosystems in western Sichuan according to Costanza’s ecosystem service function system. The total value of ecological service of natural forests in western Sichuan is 46 84 × 10 8USD / a, of which ecological benefits, economic benefits and social benefits accounted for 77 5 1%, 17 10% and 5 39%, respectively, reflecting that natural forest ecosystems have extremely polar Significant ecological function. In terms of ecological benefits, the ecological functions such as gas regulation, erosion control and accumulation of strata, nutrient circulation and waste treatment value are especially obvious. The ecological service value of the natural forests in western Sichuan accounted for 0 5 2% of the total value of the whole country, but the contribution of gas regulation and genetic resources to the national ecosystem services was very high, which was respectively 225 and 76%. Due to the many uncertainties and immature methods of natural forest ecosystem, the ecological service value of natural forests in western Sichuan is only a conservative and lower estimate