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何文,余玲,王金叶,姚月锋,李宁,黄金君.漓江流域景观生态安全评价及其影响因素分析[J].广西科学,2024,31(6):1132-1143. [点击复制]
- HE Wen,YU Ling,WANG Jinye,YAO Yuefeng,LI Ning,HUANG Jinjun.Evaluation of Landscape Ecological Security and Analysis of Its Influencing Factors in the Lijiang River Basin[J].Guangxi Sciences,2024,31(6):1132-1143. [点击复制]
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| 漓江流域景观生态安全评价及其影响因素分析 |
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何文1, 余玲2, 王金叶3,4, 姚月锋1, 李宁2, 黄金君1
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| (1.广西壮族自治区中国科学院广西植物研究所, 广西喀斯特植物保育与恢复生态学重点实验室, 广西桂林 541006;2.桂林航天工业学院, 广西桂林 541004;3.桂林理工大学旅游与风景园林学院, 广西桂林 541006;4.南宁理工学院, 广西南宁 530000) |
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| 摘要: |
| 漓江流域是广西东北部的重要生态屏障，探讨其生态安全对维持区域可持续发展具有重要意义。然而，喀斯特地区特殊的地质地貌致使漓江流域生态环境脆弱而敏感，加之人类活动的长期干扰，导致漓江流域生态安全格局复杂多变，影响因素也尚不明晰。因此，本研究采用景观指数法分析漓江流域2000-2030年的景观生态安全格局，并通过随机森林(RF)模型分析气候、土壤和人类活动等29个因素对漓江流域景观生态安全格局演变的影响。研究结果表明，2000-2020年，漓江流域景观生态安全水平总体上呈现出先上升后下降的趋势;在自然发展情景下，2030景观生态安全水平将继续下降，而生态保护优先情景可遏制这一下降趋势。在空间上，漓江流域北部和东部地区景观生态安全水平高于西部和南部区域。漓江流域景观生态安全格局受人类活动、水文、气候、农业和植被等多因素共同影响。此外，2000-2020年，漓江流域景观生态安全格局主要影响因素逐步从地形、旅游、水文和农业生产转向气候、人口密度和植被。研究结果可为漓江生态保护与流域可持续发展提供科学依据。 |
| 关键词: 漓江流域 生态安全 景观指数模型 时空变化 影响因素 |
| DOI：10.13656/j.cnki.gxkx.20241207.008 |
| 投稿时间：2024-06-27修订日期：2024-07-17 |
| 基金项目:广西重点研发计划项目(AB22035060)，广西自然科学基金项目(2024GXNSFAA010318)，国家自然科学基金项目(32060369)，广西植物研究所基本业务费项目(桂植业23005)和广西喀斯特植物保育与恢复生态学重点实验室自主研究课题(22-035-26)资助。 |
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| Evaluation of Landscape Ecological Security and Analysis of Its Influencing Factors in the Lijiang River Basin |
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HE Wen1, YU Ling2, WANG Jinye3,4, YAO Yuefeng1, LI Ning2, HUANG Jinjun1
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| (1.Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin, Guangxi, 541006, China;2.Guilin University of Aerospace Technology, Guilin, Guangxi, 541004, China;3.College of Tourism & Landscape Architecture, Guilin University of Technology, Guilin, Guangxi, 541006, China;4.Nanning College of Technology, Nanning, Guangxi, 530000, China) |
| Abstract: |
| The Lijiang River Basin,located in northeastern Guangxi,serves as a crucial ecological barrier.Exploring the ecological security of the Lijiang River Basin is significant for maintaining regional sustainable development.However,the unique karst geological conditions render the eco-environment in the Lijiang River Basin fragile and sensitive,which,together with the long-term human activities,has led to a complex and dynamic ecological security pattern in this region.Additionally,the influencing factors remain unclear.The landscape index method was employed to assess the landscape ecological security pattern in the Lijiang River Basin from 2000 to 2030.Random Forest (RF) models were used to analyze the effects of 29 factors involving climate,soil,and human activities on the evolution of the landscape ecological security pattern.The results indicated that from 2000 to 2020,the overall landscape ecological security level in the Lijiang River Basin initially increased and then decreased.In a natural development scenario,the landscape ecological security level by 2030 is expected to keep declining,which,however,can be curbed in an ecological priority scenario.Spatially,the northern and eastern regions exhibited better landscape ecological security than the western and southern regions.The landscape ecological security pattern in the Lijiang River Basin was influenced by multiple factors,including human activities,hydrology,climate,agriculture,and vegetation.Additionally,from 2000 to 2020,the influencing factors of the landscape ecological security pattern gradually shifted from topography,tourism,hydrology,and agricultural production to climate,population density,and vegetation.These findings provide scientific evidence for the ecological protection and sustainable development of the Lijiang River Basin. |
| Key words: Lijiang River Basin ecological security landscape index model spatiotemporal changes influencing factors |
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