拉萨地区典型生态系统服务功能的比较研究——以达孜县为例

Comparing study on ecosystem services of typical ecosystems in Lhasa area:a case study of Dazi County

以拉萨达孜县为例,采用市场价值法、影子价格法、替代工程法等,对山地灌丛草原、青稞农田和北京杨人工林3类典型生态系统的服务功能进行比较研究.结果表明：达孜县山地灌丛草原、青稞农田和北京杨人工林生态系统的物质生产、固定CO2、释放O2、涵养水源、维持营养物质循环等服务功能总价值分别为265.03×10^4,37139.38×10^4,263.82×10^4元/a.其中,生命支持功能的价值分别是产品服务价值的4.81,1.19,7.85倍,3类典型生态系统生命支持功能的经济价值均大于其产品服务价值.

The ecosystem services of mountain shrub-steppe, Tibet barley cropland and poplar plantation were evaluated by using methods of market value, shadow price and substitution engineering with a case study in Dazi County, Lhasa Municipality. It was indicated that the annual total economic values of ecosystem services of mountain shrub-steppe, Tibet barley cropland and poplar plantation were 265.03×10^4 , 37 139.38×10^4 , 263.82×10^4 Chinese Yuan respectively in terms of mass production, CO2 fixation, O2 release, water holding and nutrient cycle maintaining. The values of life supporting in these ecosystems were 4.81, 1.19 and 7.85 times respectively as much as those of goods production. Therefore, life supporting values were all higher than goods production values in these ecosystems.