Study on valuation of rangeland ecosystem services of China
中国自然草地生态系统服务价值

It is of great significance to estimate ecosystem services value.By using method proposed by Constaza et al (1997) and others,this paper calculated the unit area value of rangeland ecosystem services in terms of its biomass in China.The results showed that the total value of annual rangeland ecosystem services in China was about US＄ 149.79 billion,among which,the percentage of gas regulation took up 2.66％ ,that of disturbance regulation accounted for 16.07％ ,water regulation and water supply 14.44％ ,erosion control and sediment retention 9.08％ ,soil formation 0.31％ ,waste treatment 42.03％ ,pollination 7.83％ ,biological control 7.2％ ,refugia 1.08％ ,food production and raw material 22.26％ ,and recreation and culture 5.78％ .Owing to the integrated effects of biological communities distribution and ecosystem function of unit area,the contribution ratio of ecosystem services of various rangeland types different greatly.The contribution ratio of marsh type made up 52.34％ ,the total contribution ratio of temperate steppe type,tropical herbosa type,tropical shrub herbosa type,lowland meadow type and alpine meadow type varied in the range from 5.03％ to 7.74％ ,that of others types below 5％ .