Land use/land cover change and the effects on ecosystem services in the Hengduan Mountain region, China
Land use/land cover change and the effects on ecosystem services in the Hengduan Mountain region, China
复制标题
中国横断山区土地利用/土地覆盖变化及其对生态系统服务的影响
DOI：
10.1016/j.ecoser.2018.09.008
复制
发表时间：
2018
影响因子：
7.6
通讯作者：
Liang Ma
中科院分区：
文献类型：
--
作者：
Yahui Wang;Erfu Dai;Le Yin;Liang Ma
横断山地区是我国重要的生态功能区之一，近20年来土地利用/土地覆被（LUCC）发生了剧烈变化，但其生态系统服务功能的变化效应尚不清楚。本文对基于代理的方法进行了修正，分析了30年来土地利用/覆被变化和生态系统服务价值（ESVs）的动态变化，并利用弹性指标评估了ESVs对土地利用/覆被变化的敏感性。1990-2000年期间，林地转化为草地是由于砍伐森林，但由于实施生态项目，2000-2010年出现了相反的趋势。1990-2000年，整个区域的ESV略有下降（每年0.01%），2000-2010年急剧上升（每年0.14%）。1990-2000年和2000-2010年的弹性分别为0.07和0.29，属于中等水平。就整个区域而言，林地是重点保护的土地利用类型。沿海拔梯度应采取不同的发展战略。低区要注重经济与生态的协调发展，高区要注重生态保护，县级要调整各县的林草比例。
As one of the most important ecological functional area in China, the Hengduan Mountain region has experienced dramatic land use/land cover changes (LUCC) over the past 20years, but the effects of these changes on ecosystem services remain unknown. We revised a proxy-based method to analyze LUCC and ecosystem service value (ESVs) dynamics over three decades, and evaluated the sensitivity of ESVs to LUCC by using an elasticity indicator. Forest land converted to grassland during 1990–2000 was due to deforestation, but a reverse trend was found in 2000–2010 as a result of the implementation of ecological projects. The ESVs of the entire region decreased slightly (0.01% per year) in 1990–2000, and sharply increased (0.14% per year) in 2000–2010. The elasticity reached 0.07 for 1990–2000 and 0.29 for 2000–2010, which were moderate levels for China. For the wholeregion,forest land isakey landuse typeandshould bemaintained. Alongthe elevationgradient, different developmental strategies should be adopted. Lower areas should focus on the coordinated development of economy andecology, andhigherareasonecologicalprotection.Onthecountylevel,itisnecessaryto adjustthe forest-grassland proportion in each county..