摘要
为了定量分析和比较区域生态服务功能及其价值变化，运用中国生态系统服务价值当量因子表和岷江上游流域单位面积农田生态系统提供的食物生产服务的经济价值，以及分析1986、1995和2000年三期TM遥感影像所得到的土地利用情况，对岷江上游地区不同年代的生态服务价值变化进行了估算和比较。并初步分析了生态服务价值变化的原因。1986～1995年，农田面积增加了60801hm^2，比1986年增长了477％。林地面积减少了89012．17hm^2，占原来面积的4．97％。总的生态服务价值从1986年到2000年减少了119．9×10^8元。主要是由于人口的增加和森林的砍伐，导致森林面积减少，转变为草地、农田等土地利用类型。通过1995年和2000年对比得出：自从1998年实施“天然林保护工程”政策以来，到2000年森林生态系统面积与1995年相差约4165．28hm^2，生态服务价值相差约7．9亿元，可见国家政策在保护生态系统服务功能上虽起到了一定的作用，但与1986年相比还相差甚远，天然林保护工程任重而道远。
In order to quantitatively analyze the change of ecosystem services caused by land use change, the economic value of ecosystem services in upper reaches of Minjiang River during different time period was estimated with the table of equivalent weight factor of economic value of ecosystem services of China, and the economic value of food production was supplied with the cropland ecosystem of 2001. The database of Chinese resource and environment spatial-temporal land use during 1986,1995 and 2000 was used for analyzing three-period TM data. Over the 15 years, changes in ecosystem services value was calculated,with their causes analyzed. It is shown that the land use change is evident： the area of farmland increased by 60 801 hm^2 from 1986 to 1995 ,and the area of forest decreased by 89 012.17 hm^2. The value of ecosystem services had decreased by 119.9 × 10^8 yuan from 1986 to 2000,mainly because of the change of forest into farmland or meadow. To compare the data in 1995 and 2000,it is found that the area of forest in 2000 was 4 165.28 hm^2 less than in 1995 ,and the ecosystem service value had about 7.9×10^8 yuan difference since the introduction of forest protection policy. It is shown that the forest protection policy has some effect on the change of other land types to forest type.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2007年第6期821-825,共5页
Resources and Environment in the Yangtze Basin
基金
国家重点基础研究发展规划项目"西部典型区域森林植被对农业生态环境的调控机理"(编号:2002CB111506)资助
关键词
土地利用
生态系统服务
生态价值
岷江上游
land use
ecosystem service
ecological value
upper reaches,Minjiang River
