摘要
以“中国生态系统生态服务价值当量因子表”为基础,通过生物量等因子的校正,评价民勤荒漠绿洲植被的生态服务功能价值及其变化,并分析其变化原因．结果表明:1983,1993和2003年民勤绿洲植被的生态服务功能价值分别为2．22×109,3．02×109,5．22×109元／a．1983—2003年植被的生态服务功能价值增长1．35倍．民勤绿洲生态系统服务功能主要由林地植被和草地植被生态提供,影响最大的是土壤形成与保护和生物多样性维持功能．
The ecological value of vegetation services in Minqin desert oasis was estimated with the table of equivalent weight factor of ecological value of ecosystem services of China, and the economic value of food production per hectare was supplied by cropland ecosystem and vegetation area in 1983, 1993 and 2003. The results showed that the ecological value of vegetation services in Minqin Oasis was 5.22 × 10^9 Yuan/a in 2003, 3.02×10^9 Yuan/a in 1993 and 2.22×10^9 Yuan/a in 1983. Net increase was 135 percent between 1983 and 2003 and, at the same time, the causes for the change of vegetation services were discussed. The forest and grassland vegetation services offered the main ecological value and the value of soil formation and disposition and biodiversity provided by vegetation services is the highest in Minqin desert oasis ecosystem.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第1期44-49,共6页
Journal of Lanzhou University(Natural Sciences)
基金
甘肃省农牧厅农业科技专项资金资助项目(2003303).
