| “一带一路”背景下博多河流域景观格局变化及生态风险评价研究 |
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| 引用本文： | 岳启发,赵筱青,李思楠,谭琨,普军伟,王茜.“一带一路”背景下博多河流域景观格局变化及生态风险评价研究[J].世界地理研究,2021,30(4):839-850. |
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| 作者姓名： | 岳启发 赵筱青 李思楠 谭琨 普军伟 王茜 |
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| 作者单位： | 云南大学资源环境与地球科学学院，昆明 650500 |
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| 基金项目： | 云南省科技厅-云南大学“双一流”建设联合资助项目(2018FY001-017);云南大学研究生创新人才培养项目(C176230200);云南大学国际化与文化传承创新—孔子学院转型建设与中外人文交流项目(C176250202);云南大学一流大学建设项目(C176210103) |
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| 摘 要： | “一带一路”沿线国家的生态风险研究有利于区域可持续发展，充分发挥对外辐射的作用，促进国家间经济流动、贸易畅通，实现共同繁荣。以孟加拉国博多河流域为例，选取1980—2017年期间的5期遥感影像，基于景观格局指数建立生态风险模型，综合运用空间自相关分析法、地统计学分析法、重心转移法等方法，研究流域景观格局变化特征以及生态风险演变规律。结果表明：（1）1980—2017年流域内景观类型主要是林地和耕地，且景观格局变化显著，耕地和湿地面积减少，林地、建设用地和未利用地面积增加；（2）1980年以来，流域生态风险整体呈下降趋势，但各类风险转化显著，除低风险区面积减少之外，其余风险区均存在不同程度的增加，各期流域生态风险重心均位于锡拉杰甘杰县，主要在流域中部沿南北方向发生偏移；（3）流域内各期的生态风险在空间上呈显著正相关关系，“高-高”集聚基本稳定，主要分布在博多河及其沿岸；“低-低”集聚变化显著，由博多河下游先向上游及流域西南部变化，后逐渐向流域西部和南部聚拢。研究结果为构建流域生态安全格局及进行生态风险预警工作等提供科学依据和理论支撑。
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| 关 键 词： | 生态风险 景观格局指数 重心转移 博多河流域 “一带一路” |
| 收稿时间： | 2020-02-22 |
| 修稿时间： | 2020-05-08 |
Landscape pattern changes and ecological risk in the Padam River Basin under the background of the "Belt and Road" Initiative |
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| Qifa YUE,Xiaoqing ZHAO,Sinan LI,Kun TAN,Junwei PU,Qian WANG.Landscape pattern changes and ecological risk in the Padam River Basin under the background of the "Belt and Road" Initiative[J].World Regional Studies,2021,30(4):839-850. |
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| Authors: | Qifa YUE Xiaoqing ZHAO Sinan LI Kun TAN Junwei PU Qian WANG |
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| Institution: | School of Resource, Environment & Earth Science, Yunnan University, Kunming 650500, China |
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| Abstract: | This paper took the Padam River Basin in Bangladesh as the research object, constructing the landscape ecological risk assessment model based on landscape pattern index. Autocorrelation analysis, geo-statistical analysis and center of gravity transfer model were used to study the landscape change and the temporal and spatial characteristics of the basin based on 5 remote sensing images from 1980 to 2017.The results show that: (1)From 1980 to 2017,forest land and cultivated land are Main landscape types in the basin. There were clear changes in the landscape types, in which the areas of cultivated land and wet land decline substantially, and the forest land, building land, unused land increase; (2) During the period of 1980-2017, the overall ecological risk declines continuously and various types of risks transform significantly. Except for the reduction in the area of low-risk areas, the remaining risk areas increased to varying degrees. The ecological risk gravity center in each period of the basin in located in Sirajganj District, mainly transfers along the north-south direction; (3) The global Moran's index of each period indicates the ecological risk in the study area showing positive spatial correlation characteristics. The HH accumulation is basically stable, which mainly distributes on the Padam River and its coasts. The low value aggregation region changes significantly, and it finallygathers in the west and south of the basin. The result of study could provide a scientific theoretical basis and reliable technical support for constructing regional ecological security patterns and establishing the early warning mechanism. |
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| Keywords: | ecological risk landscape pattern index center of gravity transfer Padam River Basin 'Belt and Road' Initiative |
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