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近20年兰西城市群生态系统服务价值对土地利用转型的时空响应
摘要点击 507  全文点击 125  投稿时间:2023-06-28  修订日期:2023-08-24
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中文关键词  兰西城市群  土地利用变化  生态系统服务价值  生态风险  时空演变
英文关键词  Lanzhou-Xining Urban Agglomeration  land use change  ecosystem service value(ESV)  ecological risk  spatiotemporal evolution
作者单位E-mail
梁膑月 西北师范大学地理与环境科学学院, 甘肃省绿洲资源环境与可持续发展重点实验室, 兰州 730070 lbylby1021@163.com 
曹春 西北师范大学地理与环境科学学院, 甘肃省绿洲资源环境与可持续发展重点实验室, 兰州 730070 caochun@nwnu.edu.cn 
李锦超 西北师范大学地理与环境科学学院, 甘肃省绿洲资源环境与可持续发展重点实验室, 兰州 730070  
唐千惠 西北师范大学地理与环境科学学院, 甘肃省绿洲资源环境与可持续发展重点实验室, 兰州 730070  
吴育垚 西北师范大学地理与环境科学学院, 甘肃省绿洲资源环境与可持续发展重点实验室, 兰州 730070  
肖潇 西北师范大学地理与环境科学学院, 甘肃省绿洲资源环境与可持续发展重点实验室, 兰州 730070  
饶玉良 西北师范大学地理与环境科学学院, 甘肃省绿洲资源环境与可持续发展重点实验室, 兰州 730070  
王继伟 西北师范大学地理与环境科学学院, 甘肃省绿洲资源环境与可持续发展重点实验室, 兰州 730070  
杨丽琴 西北师范大学地理与环境科学学院, 甘肃省绿洲资源环境与可持续发展重点实验室, 兰州 730070  
中文摘要
      快速城市化和人类活动加剧了对现代城市群中各种生态系统服务退化的威胁,探索城市群尺度下的生态安全状况具有重要意义.以兰西城市群为研究区,选择2000、2005、2010、2015和2020年土地利用数据,引入景观生态风险指数,运用土地利用转移矩阵、单位面积价值当量因子法和双变量空间自相关分析法,分析兰西城市群土地利用变化特征,阐明土地利用转型引起的生态风险变化对生态系统服务价值的影响.结果表明:①2000~2020年间兰西城市群土地利用类型主要以草地、耕地和林地为主.建设用地面积扩张明显,主要来源于耕地和草地;6种土地利用类型交叉转化较强,土地利用变化总面积为6646.05 km2;②从空间变化上来看,兰西城市群生态系统服务价值空间格局未发生明显转变,但区域差异性显著,总体呈现西北高、东南低的分布特征;③从时间变化上来看,兰西城市群生态系统服务价值呈逐年增长的趋势,总价值流向从1864.59亿元增长为1921.56亿元,总增值56.97亿元;④兰西城市群近20年生态风险指数整体呈上升的趋势,生态风险区以低生态风险区和较低生态风险区占主导地位;生态系统服务价值与生态风险指数有显著的正向空间相关性.本文旨在揭示土地利用方式对生态系统服务价值和生态风险影响的认识,为区域生态风险管理和土地利用政策制定提供重要参考,进而促进黄河流域生态环境高质量发展.
英文摘要
      With rapid urbanization and human activities exacerbating threats to the degradation of various ecosystem services in modern urban agglomerations, the exploration of the state of ecological security at the scale of urban agglomerations is of great significance. This study considered the Lanzhou-Xining Urban Agglomeration as the research area, based on the land use data in 2000, 2005, 2010, 2015, and 2020. At the same time, the landscape ecological risk index was introduced. The land use change characteristics of the Lanzhou-Xining Urban Agglomeration were analyzed by using the land use transfer matrix, the value per unit area equivalent factor method, and the bivariate spatial autocorrelation analysis method to elucidate the impacts of the changes in the ecological risk index induced by the land use transition on the value of ecosystem services. This study analyzed the land use change characteristics of the Lanzhou-Xining Urban Agglomeration and elucidated the impacts of changes in the ecological risk index on the value of ecosystem services caused by land use transformation. The results showed that:① During the period from 2000 to 2020, the land use types of the Lanzhou-Xining Urban Agglomeration were mainly dominated by grassland, cropland, and forest land. The construction land area had expanded significantly mainly from cropland and grassland, and the six land use types had strong cross-transformation. The total area of land use change was 6 646.05 km2. ② In terms of spatial changes, the spatial pattern of ecosystem service value in the Lanzhou-Xining Urban Agglomeration had not undergone obvious transformation. However, the regional variability was significant, generally showing the distribution characteristics of high in the northwest and low in the southeast. ③From the perspective of temporal change, the value of ecosystem services in the Lanzhou-Xining Urban Agglomeration showed an upward trend, with the total flow of value increasing from 186.459 billion yuan to 192.156 billion yuan, with a total value-added of 5.697 billion yuan. ④ There was a rising trend in the overall ecological risk index of the Lanzhou-Xining Urban Agglomeration over the past 20 years. Low ecological risk areas and lower ecological risk areas dominated the ecological risk areas. There was a significant positive correlation between the value of ecosystem services and the ecological risk index. This study aimed to reveal the understanding of the impacts of land-use practices on ecosystem service values and ecological risks, to provide important references for regional ecological risk management and land-use policy formulation, and thus to promote the high-quality development of the ecological environment in the Yellow River Basin.

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