摘要
利用酒泉市1997-2006年土地利用变更调查数据和相关统计资料,计算土地利用结构异质性指数和生态服务价值,分析土地利用结构与生态服务价值的变化及其相互关系。结果表明:1997-2006年酒泉市耕地、林地、园地面积在增加,其中耕地增加最多,增加了9 803.15hm2,牧草地、水域和未利用地面积不断减小,其中牧草地减少最多,减少了207 470.56 hm2;酒泉市土地利用结构多样性指数和均匀度增加而优势度降低,土地利用趋于多样化和均匀化;各类土地的生态服务价值都有不同程度的增加,土地利用生态服务价值总体呈增加趋势;土地利用生态服务价值与土地利用结构线性相关,通过增加牧草地、水域和耕地等生态用地面积,提高土地利用集约度,调整土地利用结构促进土地利用的多样化、均匀化,可以增加生态系统稳定性和提高生态系统服务功能的经济价值。
Based on the survey data and relevant statistical sources of land-use change from 1997 to 2006 of Jiuquan, this paper worked out heterogeneity index of land-use and ecosystem service value, and analyzed the changes in land-use structure and the value of ecosystem services and their relationship. The results showed that in Jiuquan, from 1997 to 2006, the acreage of cultivated, forest and orchard land increased, and the cultivated land increased most, which have increased 9803.15hm2 ; the acreage of pasture, water area and unused land decreased, and the pasture decreased most, which reduced 207470.56 hm2; Land-use diversity index and evenness degree increased while dominance degree decreased, the land-use is getting more and more diversification and homogenization ; ecosystem services value of all kinds of land have increased in different levels, the overall ecosystem services value of land use tended to increase ; ecosystem services value of land-use have linear correlation with land use structure. By increasing the area of ecological land of pasture, water and cultivated land, it can increase intensity of land-use and promote the diversification and uniformity of it, also can increase the ecosystem stability and improve economic value of ecosystem services.
出处
《中国人口·资源与环境》
CSSCI
北大核心
2011年第3期124-128,共5页
China Population,Resources and Environment
基金
国家科技支撑计划项目(编号:2007BAD46B08)
甘肃省自然基金项目(编号:3ZS041-A25-002)
