陕西省森林生态系统服务功能价值评估

The economic evaluation of forest ecosystem service in Shaanxi Province

目的评估陕西省森林生态系统生态服务功能在不同区域的物质量和价值量。方法应用物质量和价值量相结合的方法,借助ARCVIEW地理信息系统技术,根据不同林分在不同区域的实地观测值进行估算。结果陕西省森林生态服务功能总价值为3911215.35万元,其中长城沿线风沙区155490.77万元;陕北黄土高原区720626.49万元;关中盆地177421.57万元;秦巴山地2857676.52万元。按服务功能类型划分,林产品价值467723.47万元,涵养水源价值842471.95万元,固定CO2价值684977.04万元,释放O2价值943217.78万元,营养元素循环价值76053.85万元,土壤保持价值896771.26万元。结论陕西省森林生态系统在全省生态系统中占有重要地位,对陕西省生态环境可持续发展和重建起着举足轻重的作用。

Aim To evaluate the forest ecosystem service in the different regions of Shaanxi Province. Methods The forest ecosystem service is evaluated by the method of material valuation,the ARCVIEW geographic information system technique,and the observation on the spot in the different regions.Results The total value of the forest ecosystem service in Shaanxi Province is 391.12 billion yuan.Among them the value in the sand blown region along the Great Wall is 15.55 billion yuan,the value in the region of loess plateau in Shanbei is 72.06 billion yuan,the value in the Guanzhong basin is 17.74 billion yuan,and the value in the Qinling-Daba Mountains is (285.77) billion yuan.According to the type of service function,the value of products of forest is 467 723.47 billion yuan,the value of forest water conservation is 842 471.95 billion yuan,the value of fixing CO_2 and releasing O_2 is (684 977.04) billion yuan and 943 217.78 billion yuan respetively,the value of nourishment chemical elements circulation is 76 053.85 billion yuan,and the the value of forest′s soil and fertilization conservation is 896 771.26 billion yuan.Conclusion It may be said that the forest ecosystem system occupies the very important position in ecosystem in Shaanxi Province,and keeps the sustainable development and rebuilding of environment in the province.