| 黄河流域植被时空变化及驱动因素 |
| 摘要点击 268 全文点击 9 投稿时间：2025-03-04 修订日期：2025-05-30 |
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| 中文关键词 植被特征 空间异质性 驱动因素 交互作用 黄河流域 |
| 英文关键词 vegetation characteristics spatial heterogeneity driving factors interaction mechanism Yellow River Basin |
| DOI 10.13227/j.hjkx.202503037 |
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| 中文摘要 |
| 黄河流域植被生态系统对气候变化具有高度敏感性，解析气候对植被动态的驱动机制对黄河流域生态治理具有重要作用. 整合2001~2020年归一化植被指数、植被总初级生产力、叶面积指数、增强型植被指数、叶绿素荧光和植被覆盖度这6种植被特征数据，结合IGBP植被分类体系，量化不同植被类型的植被特征差异与趋势变化；通过构建多尺度地理加权回归模型和地理探测器，揭示气候因子与土壤水分对植被覆盖度的空间异质性影响与交互作用机制. 结果表明：①2001~2020年黄河流域中部和东部大部分区域植被显著改善，黄河源区和西北部分区域则呈现退化趋势，而中游黄土高原区域年际变异性最大；②森林类型的植被特征指标值明显高于其他类型，植被覆盖度对植被类型分异最为敏感；③在黄河流域大部分区域降水促进植被生长，温度在北部和中部对植被生长产生抑制，饱和水汽压差在东南部和西北部显著促进植被覆盖，在南部及东南部湿润区饱和水汽压差表现为促进作用，土壤水分表现为抑制作用，流域整体上降水与温度、饱和水汽压差、土壤水分具有较强的交互作用，促进了植被覆盖. 研究结果可为黄河流域生态分区治理提供理论支持. |
| 英文摘要 |
| The vegetation ecosystem in the Yellow River Basin is highly sensitive to climate change. Analyzing the driving mechanism of climate on vegetation dynamics plays an important role in the ecological management of the Yellow River Basin. Based on the data of the normalized difference vegetation index， total primary productivity， leaf area index， enhanced vegetation index， chlorophyll fluorescence， and vegetation coverage from 2001 to 2020， combined with the IGBP vegetation classification system， the differences and trends of vegetation characteristics of different vegetation types were quantified. By constructing a multi-scale geographically weighted regression model and Geodetector， the spatial heterogeneity and interaction mechanism of climatic factors and soil moisture on vegetation coverage were revealed. The results showed that： ① From 2001 to 2020， the vegetation in the central and eastern parts of the Yellow River Basin was significantly improved， whereas that in the northwest showed a trend of degradation， while the interannual variability of the middle reaches of the Loess Plateau was the largest. ② The vegetation characteristic index value of forest type was significantly higher than that of other types， and the vegetation coverage was the most sensitive to the differentiation of vegetation types. ③ In most areas of the Yellow River Basin， precipitation promoted vegetation growth， temperature inhibited vegetation growth in the north and middle， and saturated vapor pressure difference significantly promoted vegetation coverage in the southeast and northwest. In the humid areas of the south and southeast， the saturated vapor pressure difference showed a promoting effect， and the soil moisture showed an inhibitory effect. In the whole basin， precipitation and temperature， saturated vapor pressure difference， and soil moisture had a strong interaction， which promoted vegetation coverage. The research results provide theoretical support for the ecological zoning management of the Yellow River Basin. |
