| 气候变化和人类活动对中国典型湖泊流域植被动态影响 |
| 摘要点击 201 全文点击 15 投稿时间：2024-05-03 修订日期：2024-06-25 |
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| 中文关键词 洞庭湖流域 鄱阳湖流域 太湖流域 归一化植被指数（NDVI） 气候变化 人类活动 |
| 英文关键词 Dongting Lake Basin Poyang Lake Basin Taihu Lake Basin normalized difference vegetation index（NDVI） climate change human activities |
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| 中文摘要 |
| 监测植被动态并分离和量化气候变化与人类活动对植被覆盖变化的影响,可为维持区域生态平衡与生态修复科学规划提供理论支撑.以中国三大典型湖泊流域为研究对象,基于多时相归一化植被指数（NDVI）、气象和土地利用数据,结合趋势分析、一阶差分多元回归分析和残差分析等方法,在区分自然区和人为区的基础上研究了2000~2022年洞庭湖流域、鄱阳湖流域和太湖流域植被NDVI变化的时空特征及驱动机制.结果表明,2000~2022年洞庭湖流域、鄱阳湖流域和太湖流域整体及其人为区和自然区植被均呈绿化态势.整体上,相较于降水和太阳辐射,三大湖泊流域植被NDVI对气温更敏感,三大湖泊流域植被生长对气温总体均为正敏感性,对降水则均主要表现为负敏感性.气候变化促进了三大湖泊流域植被NDVI提升,而在三大湖泊流域的人为区,人类活动主导了植被NDVI变化且影响表现出双向性,在洞庭湖流域和鄱阳湖流域对植被NDVI提升主要表现为积极作用,在太湖流域反之.研究结果可为湖泊流域因地制宜开展生态保护提供科学支撑. |
| 英文摘要 |
| Monitoring vegetation dynamics and isolating as well as quantifying the impacts of climate change and human activities on vegetation cover changes are crucial for providing theoretical support for maintaining regional ecological balance and scientifically planning ecological restoration. This study focuses on the Dongting, Poyang, and Taihu Lake basins. Using multi-temporal normalized difference vegetation index （NDVI） data, meteorological data, and land use data and employing methods, such as trend analysis, first-order difference multiple regression analysis, and residual analysis, this research investigates the spatiotemporal characteristics and driving mechanisms of vegetation NDVI changes in these basins from 2000 to 2022, distinguishing between natural growth areas and anthropogenic impact areas. The results indicate that from 2000 to 2022, vegetation in the Dongting, Poyang, and Taihu Lake basins, including both anthropogenic impact areas and natural growth areas, exhibited a greening trend. Overall, compared to precipitation and solar radiation, the NDVI of vegetation in the three major lake basins was more sensitive to temperature. Vegetation growth in these basins exhibited a consistently positive sensitivity to temperature, whereas it predominantly showed a negative sensitivity to precipitation. Climate change has promoted an increase in vegetation NDVI across the three lake basins. In anthropogenic impact areas, human activities predominantly drove the changes in vegetation NDVI, with the effects being bidirectional. Specifically, in the Dongting and Poyang Lake basins, human activities mainly had a positive impact on vegetation NDVI, whereas in the Taihu Lake Basin, the impact was predominantly negative. |
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