平武县生态系统服务价值时空动态分析

Spatio-Temporal Dynamic Analysis of Ecosystem Service Value in Pingwu County

【目的】平武县作为涪江上游的水源涵养地与重要生态功能区,开展生态系统服务价值评估,对生态环境质量监测与自然资源资产化管理具有重要现实意义。【方法】本研究以单位面积价值当量因子法为基础,基于三期土地利用/土地覆被遥感监测数据,对平武县生态系统6个一级类型,14个二级类型,按11种生态系统服务功能细分类型,评估2005-2015年平武生态系统服务价值,并构建时空动态调节因子,对2015年内生态系统服务价值变化进行时空动态分析。【结果】(1)2005-2015年间,平武县土地利用格局比较稳定,生态系统服务价值略微增加,2015年达到333.30亿元,其中森林生态系统价值服务占比最大,接近65%。在服务功能类型中,气候调节功能价值总量最大,达88.36亿元。(2)2015年内,平武生态系统服务功能价值8月最高、2月最低,变化范围为150~422亿元。【结论】2005-2015年,平武县生态系统服务价值总体稳定、略微增加,年内逐月变化显著。生态系统服务价值时空动态分析方法能有效服务于平武生态系统监测与自然资源资产化管理。

【Objective】Pingwu county is the water conservation area and important ecological function area in the upper reaches of the Fujiang river.The assessment of Pingwu ecosystem service value is of great practical significance to the monitoring of ecological environment quality and the management of natural resources assets.【Method】This research is based on the unit area value equivalent factor method and based on the land use/land cover remote sensing monitoring data in three periods to evaluate the ecosystem service value of Pingwu county from 2005 to 2015.The Pingwu ecosystem is divided into 6 first-level ecosystems and 14 second-level ecosystems,which are evaluated according to 11 ecosystem function types.And the present study constructs the spatio-temporal dynamic value equivalent factor,and carries out spatio-temporal dynamic analysis of ecosystem service value in 2015.【Result】First,from 2005 to 2015,the land use pattern of Pingwu county was relatively stable,and the ecosystem service value increased slightly.In 2015,it reached 33.33 billion yuan,of which forest ecosystem services accounted for the largest proportion,close to 65%.Among the types of ecosystem functions,the total value of climate regulation function was the largest,reaching 8.836 billion yuan.Second,in 2015,Pingwu ecosystem service value reached the highest value in August and the lowest in February,with a range of 15-42.2 billion yuan.【Conclusion】From 2005 to 2015,Pingwu ecosystem service value was generally stable and slightly increased,with significant changes from month to month during the year.The spatio-temporal dynamic analysis method of ecosystem service value can effectively serve for the ecological monitoring and the management of natural resources assets in Pingwu county.