丘陵县域生态系统服务价值研究——以湖南省桃源县为例

Assessment on Ecosystem Services Value of Foothills County——Taking Taoyuan County of Hunan Province as an Example

对湖南桃源县区1996～2006年的生态系统服务价值进行定量评估与分析,并通过相关分析探讨其与社会经济因子的关系.结果表明,此期间桃源县的各单项指标中,水源涵养、气体调节、气候调节、土壤保持和生物多样性价值较高;其几项总价值比重达到74.6％.研究年份间,不同类型生态系统服务功能的价值排序未发生变化,排列顺序依次为：林地、耕地、水域、园地、未利用地与建设用地;地类与总生态系统服务价值量的关联度排序为林地＞建设用地＞耕地＞草地＞未利用地＞水域;农业人口变化是导致地类面积改变的重要原因之一,同时,农村经济水平的提高对于增加林地面积、城镇化发展有推动作用,水域及未利用地与社会经济因子相关性不强;对于总生态系统服务价值提高也可通过合理配置土地资源类型来实现.

The value of ecosystem services of Taoyuan county from 1996 to 2006 was quantitativly assessed and analyzed,and its relationship with socio-economic indicators was investigated by canonical correlation analysis in this paper.The results show that：during the period of 1996～2006,among the individual indicators,the value of water conservation,gas regulation,climate regulation,soil conservation and biodiversity is relatively high and has a proportion of 74.60％ of the total value.The rank of different types of ecosystem services value remains unchanged in different years,arranged in the order （from high to low）：woodland,farmland,water area,garden plot,unused land and construction land; The order of the correlation of land use types relative to the total ecosystem services value is：woodland＞ construction land ＞ farmland＞ garden plot ＞ unused land ＞water area.The proportion of agricultural population has a strong correlation with different land use types.The improvement of rural economics level will drive the protection of area ecological environment and urbanization development.The water area and unused land are irrelevant to multiple socio-economic indicators.The overall value of ecosystem services can be improved through reasonable allocation of land resource types.