| 2001~2020年西南高山峡谷区NPP时空演变及驱动因素分析 |
| 摘要点击 548 全文点击 15 投稿时间：2025-07-10 修订日期：2025-10-04 |
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| 中文关键词 高山峡谷区 植被净初级生产力（NPP） 复合驱动 气候变化 时空演变 |
| 英文关键词 alpine canyon region net primary productivity （NPP） combined driving forces climate change spatiotemporal evolution |
| DOI 10.13227/j.hjkx.202507146 |
| 作者 | 单位 | E-mail | | 杨锦 | 西南林业大学水土保持学院, 昆明 650224 | yj199901@sina.com | | 王克勤 | 西南林业大学水土保持学院, 昆明 650224 | | | 李亦然 | 西南林业大学水土保持学院, 昆明 650224
云南省山地农村生态环境演变与污染治理重点实验室, 昆明 650224
国家林业和草原局云南沾益岩溶生态系统定位观测研究站, 昆明 650224 | liyr1203@163.com | | 王震 | 西南林业大学水土保持学院, 昆明 650224
云南省山地农村生态环境演变与污染治理重点实验室, 昆明 650224
国家林业和草原局云南沾益岩溶生态系统定位观测研究站, 昆明 650224 | | | 李玲 | 西南林业大学水土保持学院, 昆明 650224 | | | 冯小纹 | 西南林业大学水土保持学院, 昆明 650224 | |
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| 中文摘要 |
| 西南高山峡谷区作为我国重要生态脆弱区和生态屏障，探析其固碳能力时空演变规律及驱动因素贡献，对于维护西南地区生态安全、发挥西南地区碳汇效益具有重要意义. 区域现有研究大多聚焦于植被覆盖和水土流失等方面，对其固碳能力变化及驱动因素的分析仍有待补充. 因此，以植被净初级生产力（NPP）为切入点，利用MOD17A3HGF（V6.1）数据集，采用Theil-Sen趋势性分析、Mann-Kendall显著性检验、多元偏相关分析以及残差分析，探析了2001~2020年西南高山峡谷区NPP时空演变规律及其驱动因素. 结果表明：①研究期间，西南高山峡谷区NPP变化（以C计）呈不显著减少趋势[变化率为-0.1 g·（m2·a）-1，P=0.92]，空间上呈“南高北低、东高西低”的分布格局，显著增加趋势集中于滇北-川西高山峡谷蓄水保土区（Ⅲ区），显著减少趋势主要分布于藏东南高寒高山峡谷生态维护区（Ⅰ区）；②NPP变化对气象变化的响应具有明显差异性，其中气温是NPP变化的关键驱动因素，其余依次为：太阳辐射>降水>风速；③NPP变化受气候变化（面积占比约为50.1%）和人类活动（面积占比约为44.0%）影响，其中区域NPP增加由气候因素（面积占比约为32.7%）主导，而NPP减少则主要由人类活动所致（面积占比约为19.3%）. 研究结果揭示了西南高山峡谷区NPP的时空变化规律及主要驱动因素，可为评估西南高山峡谷区碳汇发展潜力和区域生态治理差异化管控提供参考. |
| 英文摘要 |
| As an important ecologically fragile region and ecological barrier in China， the Southwest Alpine Canyon Region of China plays a critical role in maintaining ecological security and enhancing carbon sink benefits in southwestern China. Investigating the spatiotemporal evolution of its carbon sequestration capacity and the contribution of driving factors is of great significance. Existing regional studies have mostly focused on vegetation cover and soil erosion， while analysis of changes in carbon sequestration capacity and its driving factors remains insufficient. Therefore， this study took vegetation net primary productivity （NPP） as an entry point and utilized the MOD17A3HGF （Version 6.1） dataset， along with Theil-Sen trend analysis， Mann-Kendall significance test， multiple partial correlation analysis， and residual analysis， to examine the spatiotemporal evolution of NPP and its driving factors in the Southwest Alpine Canyon Region of China from 2001 to 2020. The results indicated that： ① During the study period， the NPP （in terms of C） in the Southwest Alpine Canyon Region of China showed a non-significant decreasing trend [changing rate=-0.1 g·（m2·a）-1， P=0.92]. Spatially， it exhibited a distribution pattern of “faster in the south than in the north， and faster in the east than in the west.” Significant increasing trends were concentrated in the Water Conservation and Soil Retention Zone of the Northern Yunnan-Western Sichuan Alpine Gorge （zone Ⅲ）， while significant decreasing trends were mainly distributed in the Ecological Conservation Zone of the Southeastern Tibet Alpine Gorge Region （zone Ⅰ）. ② The response of NPP changes to meteorological variations showed significant differences， with temperature being the key driving factor， followed by solar radiation > precipitation > wind speed. ③ Changes in NPP were influenced by both climate change （accounting for approximately 50.1% of the area） and human activities （accounting for about 44.0% of the area）. Specifically， the increase in regional NPP was primarily driven by climatic factors （accounting for about 32.7% of the area）， while the decrease in NPP was mainly caused by human activities （accounting for approximately 19.3% of the area）. The findings reveal the spatiotemporal patterns and main driving factors of NPP in the Southwest Alpine Canyon Region of China， providing references for assessing the carbon sink development potential and implementing differentiated regional ecological management strategies in the area. |
