草业学报2016，Vol.25Issue(6)：34-41,8.DOI:10.11686/cyxb2015387
三江源草原生态系统生态服务价值的能值评价
Emergy analysis of the value of grassland ecosystem services in the Three Rivers Source Region
摘要
Abstract
The Three Rivers Source Region is located in the heart of the Qinghai-Tibetan Plateau and,consid-ering the complexity and sensitivity of the area’s ecological system,it is important to comprehensively evaluate this region’s ecological services in order to be able to maintain and sustainably develop the Plateau environ-ment.Combining sequence classification with emergy analysis,six indexes were selected to measure the 2001-2010 grassland system and to determine the value of ecosystem services in the Three Rivers Source Region.The results show that over the ten-year period the value of ecosystem services varied from 137.5 billion yuan/year to 178 billion yuan/year.From a cut-off point in 2006,the total value of ecological services rose continually. The value of ecological services varies by different grassland types.Rain tundra alpine meadow made up more than 99.5% of ecological value over the ten-year period,a result that reflects the fact that these meadows ac-count for the largest area of all grassland types.The proportional contribution of each grassland type to the o-verall value of ecosystem services does not significantly change on a year-by-year basis.Of the various indica-tors of ecological value,the release of O2 and fixed CO2 hold the largest share,with the two combined account-ing for some 90% of all value.The value of hay provided directly by the grassland ecosystem accounted for a-bout 1% of the total,much lower than the contribution of other ecological services.关键词
草地综合顺序分类法(CSCS)/能值分析法/三江源/草原生态系统Key words
comprehensive and sequential classification system of rangeland(CSCS)/emergy analysis/Three Rivers Source Region/grassland ecosystem引用本文复制引用
李琳,林慧龙,高雅..三江源草原生态系统生态服务价值的能值评价[J].草业学报,2016,25(6):34-41,8.基金项目
国家自然科学基金项目（31172250）资助。 （）
