成德绵地区生态系统服务价值及敏感性研究

Research on Ecosystem Service Value and Sensitivity of Chengdu,Deyang and Mianyang

生态系统服务价值与生态敏感程度影响着人类的日常生活与区域协调可持续发展,对其展开研究,为推动生态文明建设,支撑区域高质量发展具有重要意义。研究采用土地利用动态度、当量因子法、层次分析法和双变量空间自相关方法对成德绵地区2000—2020年的土地利用、生态系统服务价值变化特征以及生态敏感性展开研究。结果表明:(1)2000—2020年,研究区草地、耕地、湿地面积呈减少态势,建设用地、林地、水域、冰川面积呈增加态势;(2)生态系统服务价值在20年内呈现先减少后增加的趋势,总体增加了2360.55×10^(6)元;(3)研究区较低敏感、中度敏感区占比接近60%,生态系统服务价值与生态敏感性呈显著正相关。研究结果具有较好的可视性与参考性,近20年来,成德绵地区的建设用地呈圈层式扩大,同时生态系统服务价值有一定增长,表明成德绵地区在经济发展的同时生态保护也取得一定成效。该区域在今后的发展中应注重永久基本农田及生态敏感区的保护。

Ecosystem service value and ecological sensitivity can affect the daily life of human being and regional coordination and sustainable development.Researches on these are of great significance to promote the construction of ecological civilization and support high-quality regional development.In this paper,land use dynamics,equivalent factor method,analytic hierarchy process and bivariate spatial autocorrelation method were adopted to study the change characteristics of land use,ecosystem service value and ecological sensitivity in Chengdu,Deyang and Mianyang from 2000 to 2020.The results showed that:(1)From 2000 to 2020,the area of cultivated land,grassland,and wetland in the study areas decreased,while the area of construction land,forests,water areas,and glaciers increased;(2)the ecosystem service value has shown a decreasing and then increasing trend in 20 years,with an overall increase of CNY2,360.55×10^(6);and(3)the proportion of low sensitivity and moderate sensitivity in the study areas was close to 60%,and there was a significant positive correlation between ecosystem service value and ecological sensitivity.The study results had great visibility and reference.In the past 20 years,the construction land in Chengdu,Deyang and Mianyang has been expanding in a circle,and the ecosystem service value has increased,indicating that the ecological protection of the Chengdu Deyang and Mianyang has made achievements while economic development.In the future development of these areas,attention should be paid to the protection of permanent basic farmland and ecologically sensitive areas.