西北旱区生态服务价值时空动态研究

Research on the spatial-temporal dynamic of ecological service value in Northwest Arid Areas

为探明西北旱区生态服务价值的时空差异性,以2004—2012年相关数据为基础,对其生态服务价值进行计算。结果表明:(1)2012年西北旱区的生态服务价值较2004年增加了166.1×109元,而人均生态服务价值却减少了8元,说明人口的增速比生态服务价值的增速大,应适当控制人口增长;(2)西北旱区各省区生态服务价值变化大小依次为甘肃>陕西中北部>新疆>内蒙古中西部>青海>宁夏,其中宁夏和青海为负变化;(3)2004—2012年间西北旱区生态经济协调度为0.33,表明生态环境和经济发展处于轻度协调状态;(4)敏感性指数小于1,说明西北旱区生态服务价值对生态价值系数弹性较弱,本文研究结果真实可信。研究期内的土地利用变化取得了较明显的生态效益,为西北旱区的经济建设和社会发展提供了良好的环境平台。

In order to investigate the spatial-temporal variability of ecological service value( ESV) in Northwest Arid Areas,the ESV was calculated based on related data from 2004 to 2012. Results showed that:( 1) The whole ESV in 2012 has increased 166.1 billion yuan than 2004 in Northwest Arid Areas,but the ESV per person was reduced 8 yuan correspondingly. This explained that the population growth rate was higher than the ESV growth rate,so the population growth rate should be appropriately controlled.( 2) The change rate of ESV in each Province and Region in Northwest Arid Areas was order as Gansu>North-Central Shaanxi>Xinjiang>West-central Inner Mongolia>Qinghai>Ningxia,and only Ningxia and Qinghai was kept as a negative change.( 3) The value of the coordination degree of ecological economic during 2004 to 2014 in Northwest Arid Areas was 0.33,it indicated a mild coordination state for the ecological enviroment and economic development;( 4) The sensibility index was less than1,it explained that the ESV in Northwest Arid Areas was relatively weak to the flexibility of ecological service coefficient. This research results were genuine and believable. During research period,the land-use change has achieved significant ecological benefits. This study provides a good enviroment platform for economical construction and social development in Northwest Arid Areas.