| 滇西北高原湖泊流域景观生态风险时空演变及驱动力识别 |
| 摘要点击 250 全文点击 17 投稿时间：2024-05-14 修订日期：2024-07-13 |
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| 中文关键词 高原湖泊流域 时空演变 景观生态风险 地理探测器 滇西北 |
| 英文关键词 plateau lake basin spatial and temporal evolution landscape ecological risk Geo-detector Northwest Yunnan |
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| 中文摘要 |
| 科学评价滇西北高原湖泊流域景观生态风险并识别驱动因素,是防范化解生态风险和保护流域生态系统的关键.选取生态敏感脆弱且面临不合理开发生态威胁的滇西北高原湖泊流域为研究区,基于土地利用数据,分析滇西北高原湖泊流域近15 a的景观生态风险的时空演变特征,利用地理探测器从整体和局部进行驱动因素识别.结果表明：①滇西北高原湖泊流域土地利用类型以耕地、林地和草地为主,三者之间的转化也较多.②2005~2020年研究区景观生态风险以中风险、中低风险和中高风险为主,高风险区占比较少；高风险区主要集中在流域的南边,中高风险区主要分布在高风险区周围,中低风险区和低风险区主要分布在泸沽湖周围、程海的西南部和洱海的西北部.风险等级变化大部分表现为相邻等级转化.③局部来看,高风险面积占比超过50%的乡镇主要分布在洱海和程海周围.④流域景观生态风险的变化受多个因素的共同作用.整体上看,研究区景观生态风险的演变受自然因素的影响最大,且随着时间的推移,多数因子之间的交互作用均不断提高；局部上看,高程和年均气温等都是以上区域的重要影响因子. |
| 英文摘要 |
| Scientific assessment of landscape ecological risks and identification of driving factors in the plateau lake basin of Northwest Yunnan are the key to prevent and resolve ecological risks and protect basin ecosystems. The plateau lake basin of Northwest Yunnan, which is ecologically sensitive and vulnerable and facing the ecological threat of unreasonable development, was selected as the research area. Based on land use data, the spatial-temporal evolution characteristics of landscape ecological risks in the plateau lake basin of Northwest Yunnan in the past 15 years were analyzed, and the driving factors were identified from the whole and local areas with geographical detectors. The results show that： ① The main land use types in the plateau lake basin of Northwest Yunnan were farmland, woodland, and grassland, and there were several mutual transformations among them. ② From 2005 to 2020, the landscape ecological risks in the study area were mainly medium risk, low-medium risk, and medium-high risk, and the high risk area accounted for a relatively small proportion. The high risk areas were mainly concentrated in the south of the basin, the medium-high risk areas were mainly distributed around the high risk areas, the low-medium risk areas were mainly distributed around the Lugu Lake, the southwest of Chenghai Lake, and the northwest of Erhai Lake. Most of the change of risk grade was the transformation of adjacent grade. ③ Locally, the towns with a high risk area accounting for more than 50% were mainly distributed around Erhai Lake and Chenghai Lake. ④ The evolution of landscape ecological risk was influenced by several factors, among which natural factors were the most important, and the interaction between most of the factors continued to improve with the passage of time. Locally, elevation and average annual temperature were important factors affecting the evolution of regional landscape ecological risk. |
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