【摘要】 为探明土地生态系统服务价值的空间差异性,以关中地区遥感影像、气象气候、土壤植被及地形地貌数据为依据,借助格网插值技术和土壤潜力测算模型获取土壤潜力栅格图,运用土地利用栅格图及生态系统服务价值当量因子加权,生成土地生态系统服务价值栅格图;从而在栅格尺度上揭示土地生态系统服务价值的空间异质性。结果表明:1986—2007年间,关中地区土地生态系统服务价值总量由509.61亿元增加到561.02亿元,增幅约为10.09%,2000—2007年段增速约为1986—2000年段的33.65倍;周边山地和黄土梁峁区生态价值增加,增量最大的为周至县;中部平原区的生态价值量减少,减量最大的是西安市区;研究期内的土地利用结构调整取得了较明显的生态效益。更多还原

【Abstract】 On the basis of Costanza’s method and expert interviews with structured questionnaire answered by 700 Chinese ecologists,a new method for assessment of ecosystem services was developed,but spatial heterogeneity issue of land ecosystem services value( ESV) assessment is still an open question. Based on remote sensing images,climate data,soil data and DEM data,according to the theory of geographic information images and supported by RS,GIS,and land-use map,soil potential map and equivalent value per unit area of ecosystem services in China to obtain map of land ESV,the spatial heterogeneity issue of land ESV assessment was solved at the grid scale. This method consists of a major flaw of land ESV assessment relying on equivalent factor. After that,the authors analyzed temporal-spatial changes of land ESV in different scales such as grid units,terrain units,and administrative units of Guanzhong area from 1986 to 2007. The results showed that the total ecosystem service value( ESV) of Guanzhong area increased from 50. 96 billion yuan in 1986 to 56. 10 billion yuan in 2007,increased by 10. 09%. The growth rate of the total ESV in 2000—2007 was 33. 65 times higher than that in 1986—2000. Among all counties,there were 11 counties whose total ESV increased. Among five geomorphologic units of Guanzhong,the total ESV of plain reduced and the total ESV of the other four geomorphologic units increased,in which both the largest increment and the fastest growing took place in mountains. Adjusting land use structure in the research period has made obvious ecological benefits,providing a good environment platform for economic construction and social development of Guanzhong area.更多还原