摘要
基于桂林市区1986、1998和2006年TM影像,提取各期土地利用类型数据,计算桂林市区生态服务价值,探讨土地利用变化对生态服务功能的影响。结果表明,从1986年到2006年,桂林市区总生态系统服务价值呈先降后升的趋势,但整体变化较小,20年间仅减少0.90%,耕地、草地和水域面积的减少是导致总价值减少的主要原因;各单项服务功能价值贡献率的等级基本稳定,水源涵养和土壤形成与保护的贡献率最大,而原材料和食物生产贡献率均较小,生态系统的服务性功能远大于生产性功能;从服务价值的构成看,林地、耕地、水域的生态服务价值占整个系统的97%以上,是生态系统服务的主体部分,其中林地的影响最大。各土地利用类型服务价值系数的敏感性指数均<1,生态服务价值对价值系数缺乏弹性。
Based on TM image data in1986, 1998 and 2006 of Guilin city, the land use data of Guilin city in each year were extracted, the ecosystem service values were estimated and the effects of land use changes on ecosystem service value s were explored. The results show that the ecosystem service values in Guilin city had a changing trend of first decrease and then increase during 1986～2006, but overall changed slightly and the value was only decreased by 0.90%, and the main causes of the total value decrease were the decreases of cropland, grassland and water body; the contribution of each ecosystem service values to the total ecosystem services value had less change, the water supply and soil formation and protection made the biggest contribution, while the contribution rates of raw material and food production were smaller, which indicated that the service function was much larger than the productive function; for the structure of ecosystem service values, the woodland, cropland and water bodies were the main components, with a total contribution rate of 97%, and of them, the impact of woodland was the biggest in the ecosystem; the service value sensitivity index of each land use type was less than 1, it indicated that the ecosystem service values of Guilin city lacked flexibility of its service value index.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2012年第10期89-93,共5页
Journal of Central South University of Forestry & Technology
基金
国家科技支撑计划课题(2012BAC16B04)
广西自然科学基金项目(2012jjBA50033)
广西科技攻关课题(桂科攻1298006)
关键词
土地利用
生态服务价值
价值变化
桂林市区
land use
ecosystem services value
value variation
urban area of Guilin city
