西南山地旅游城市土地利用变化对生态系统服务价值的影响

Effects of Land-use Change on Ecosystem Service Value in the Mountainous Tourism City

以典型西南山地旅游城市——乐山为研究区,根据谢高地ESV估算法,对乐山1996—2016年土地利用变化及其ESV进行评价。结果表明:1996—2016年土地利用变化缓慢,表现为"四减两增"。耕地、草地、水域和未利用地面积减少,林地和园地面积增加;1996—2016年总ESV呈现微弱增长趋势,年均增长率为0.18%,从1996年的196.47亿元上升到2016年的203.55亿元,这主要是因为林地面积的增加;在一级ESV中,调节服务价值最大,然而却是唯一减少的生态服务;在二级ESV中,原材料的ESV增加最多,废物处理的ESV减少最多。

Based on the scale of Chinese land ecosystem service value put forward by Xie Gaodi,the variations of land-use structure and ESV were assessed in a typical southwest mountainous tourist city—Leshan from 1996 to 2016. The results showed that the land-use changed slowly from1996 to 2016 with the decrease of cultivated land,grassland,water area and unutilized land and the increase of the woodland and garden plot. Total ESV of land increased with average annual growth rate of 0.18% from 19.647 billion yuan in 1996 to 20.355 billion yuan in 2016,which benefited from the increase of woodland. In the first ESV,regulate service value was the largest and the only reduce ecosystem services.In the secondary ESV,raw materials ESV increased the most and the waste disposal ESV reduced the most.