摘要
以武威绿洲为研究区,利用2010—2018年土地利用数据,借助价值当量因子法,采用土地利用动态度、生态系统服务价值评估模型和敏感性指数分析等方法,探究了退耕还草和城镇化背景下绿洲土地利用变化特征及其对生态系统服务价值的影响。结果表明:(1)未利用地和草地是武威绿洲的主要土地利用类型,研究期草地、城镇建设用地、交通运输用地、水域及水利设施用地面积增加,耕地、园地、林地和未利用地面积减少,土地利用主要呈现出耕地、林地和园地转为草地、城镇及工业建设用地的变化特征。(2)2010—2018年武威市生态系统服务价值总体降低,除草地和水域增加,其余地类生态系统服务价值均减少。其中,林地和草地生态系统服务价值占比最高,两者占比达71%以上,是生态系统服务价值的主要贡献者,耕地和林地面积变化是武威绿洲生态系统服务总价值减少的主要原因。(3)2010—2018年武威绿洲生态效益总体偏低,退耕还草政策实施和城镇化建设对生态系统服务价值影响明显。未利用地和水域生态系统保护利用前景广阔,需进一步优化土地利用结构,持续开展荒漠化治理和未利用地生态修复保护战略,促进经济社会和生态保护协调可持续发展。
The paper focuses on the characters of oasis land exploitation changes and its impact on ecosystem service values with the background of returning farmland to grassland and urbanization based on the 2010-2018 land exploitation data.The results showed that:(1)unexploited land and grassland were the maid types of lands in Wuwei oasis,and during the research grassland,urbanization land,transportation land,water regions and water conservancy facilities land were increasing while farmland,garden land,forests and unexploited land were decreasing,which meant more farmland,garden land and forests were turning into grassland,urbanization land and industry construction land.(2)Between 2010 and 2018 the ecosystem gross values of Wuwei City were decreasing except for that grassland and water regions were increasing while the ecosystem service values of the lands of other types were decreasing,of which forests and grassland ecosystem service values took up a high ratio by more than 71%which mainly contributed to the ecosystem service values and the changes on the areas of farmland and forests were the main reasons for the decrease on Wuwei City ecosystem service gross values.(3)In total the ecological benefits of Wuwei City during 2010-2018 were low and the policy of returning farmland to grassland and urbanization were carried out,which had a explicit effect on the ecosystem gross values.There exists a broad prospect on the unexploited lands and water region lands,which needs further steps for the optimizing the structure of land exploitation and further actions on the management of desertification and conservation of ecology of unexploited lands,which will enhance the sustainable development of economy and ecology conservation.
作者
崔博亮
王沛
陈克龙
安彦明
祁闻
CUI Boliang;WANG Pei;CHEN Kelong;AN Yanming;QI Wen(Key Laboratory of Tibetan Plateau Land Surface Processes and Ecological Conservation(Ministry of Education),Qinghai Normal University,Xining 810008,China;Qinghai Province Key Laboratory of Physical Geography and Environmental Process,College of Geographical Science,Qinghai Normal University,Xining 810008,China;Academy of Plateau Science and Sustainability,People’s Government of Qinghai Province and Beijing Normal University,Xining 810008,China;Utopia Branch,Shiyan Ecological and Environmental Bureau,Shiyan 442500,China;Shiyan Checheng City High School,Shiyan 442000,China)
出处
《生态科学》
CSCD
北大核心
2024年第3期26-35,共10页
Ecological Science
基金
国家自然科学基金项目(41661023)
第二次青藏高原综合科学考察研究(2019QZKK0405)
青海省生态环境价值评估及大生态产业发展综合研究(2019-SF-A12)
青海省创新平台建设专项青海省自然地理与环境过程重点实验室(2020-ZJ-Y06)。
