摘要
[目的]探讨农八师垦区1976～2007年土地利用变化特征及其对生态系统服务功能的影响,为区域环境变化评估提供一定的科学参考.[方法]运用遥感和GIS手段,揭示区域土地利用变化特征,并采用Costanza生态系统服务价值计算公式,参照谢高地等的中国陆地生态系统服务单位面积价值,定量研究了区域生态系统服务功能对土地利用变化的响应.[结果]近30 a,耕地和未利用地始终是农八师垦区最主要的两种土地利用/覆被类型,区域土地利用总体处于准平衡状态,后期呈现向平衡状态发展的趋势.垦区生态系统总价值先减小后增加,总价值净减少57 034.83×104元.单一服务功能的结构比例基本未发生变化,废物处理、土壤形成与保护和生物多样性保护共占总价值的50％左右.研究区生态系统服务价值对生态服务功能价值指数缺乏弹性,其中,耕地的敏感度最高,林地次之,草地、水域和未利用地的灵敏度较低,建设用地最不敏感.[结论]研究时段内,农八师垦区土地利用结构发生显著改变,生态系统服务价值有所减少,土地利用变化对区域生态系统服务产生了一定影响.垦区今后的土地开发利用中,应努力提升区域的生态系统服务总价值,使绿洲农区实现可持续的科学发展模式.
【Objective 】This research aims to analyze the characteristics of land use change and ecological services value in the 8th Agricultural Production Division Reclamation Area during 1976-2007.【Method】Based on remote sensing images in 1976,1990,2000 and 2007,we found the land use change characteristics in the area,and discussed its impact on ecosystem service value by ecological economy theory involving Costanza method and the Chinese land ecosystem services unit area value combined with the sensitivity coefficient analysis.【Result】For nearly 30 years,cultivated land and unused land were the major land use/land cover types of the reclamation area.In general,regional land use was in a quasi-equilibrium state,and presented a trend to the state of equilibrium in later stage.The total service value of ecosystem decreased firstly and then increased with a net decrease of 57 034.83 × 104yuan.The basic structure of various service functions has no significant change.Waste treatment,soil formation & protection and biodiversity conservation were the top three service functions with high service value,contributing about 50% of the total service value.Ecosystem service value was the lack of flexibility of the ecological services unit value.Cultivated land and construction land showed the most and the least sensitivity to the coefficient value respectively.【Conclusion】In the past 30 years,land use structure of the reclamation area changed so significantly that it exerted certain effect on regional ecological system value.Efforts should be made to enhance the total service value of ecosystem in oasis area in the future.
出处
《新疆农业科学》
CAS
CSCD
北大核心
2013年第8期1560-1568,共9页
Xinjiang Agricultural Sciences
基金
国家自然科学基金(41101178)
关键词
土地利用
生态服务价值
敏感度
land use
ecological services value
sensitivity
