| 黄土高原植被覆盖度变化的地形分异及土地利用/覆被变化的影响 |
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| 引用本文： | 刘宇,傅伯杰.黄土高原植被覆盖度变化的地形分异及土地利用/覆被变化的影响[J].干旱区地理,2013,36(6):1097-1102. |
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| 作者姓名： | 刘宇 傅伯杰 |
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| 作者单位： | （1 中国科学院地理科学与资源研究所，生态系统网络观测与模拟重点实验室， 北京 100101；2 中国科学院生态环境研究中心，城市与区域生态国家重点实验室， 北京 100089） |
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| 基金项目： | 国家林业局林业公益性行业科研专项（项目编号：201004058） |
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| 摘 要： | 基于16 d合成MODIS NDVI数据提取的时间序列植被覆盖度数据，采用一元线性回归趋势分析，对黄土高原2000-2008年植被覆盖度的时空变化及其地形分异、土地利用/覆被变化的影响进行了定量分析。结果表明：（1）研究时段黄土高原植被覆盖度整体呈快速上升趋势，局部下降；（2）黄土高原植被覆盖度变化存在明显的地形分异，陡坡等植被恢复、重建和保育的主要区域植被覆盖度增速显著；（3）土地利用/覆被变化对植被覆盖度的增加影响突出，土地利用/覆被类型变更区植被覆盖度增速显著高于未变化区域，退耕还林还草区增速尤其突出；（4）土地利用/覆被类型未变化区域植被覆盖度总体上也呈增加趋势，但因植被覆盖度水平相对较高，增速明显低于土地利用/覆被类型变化区。上述结果表明，黄土高原植被保育、植被恢复和重建在植被覆盖度提升方面取得了明显成效。
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| 关 键 词： | 植被覆盖度 地形分异 土地利用/覆被变化 黄土高原 |
| 收稿时间： | 2013-01-08 |
Topographical variation of vegetation cover evolution and the impact of land use/cover change in the Loess Plateau |
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| Affiliation: | （1 Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences, Beijing 100101, China; 2 State Key Laboratory of Urban and Regional Ecology，Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China） |
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| Abstract: | Based on the fraction of vegetation cover （FC） derived from 16-day composite MODIS NDVI data， using linear regression approach，the trend of the vegetation cover evolution in the Loess Plateau during 2000-2008 was quantified. The topographic variation of and the effect of land use/cover change has on the FC change rate were quantitatively analyzed. The results show as follows：（1） the FC generally increased in most parts of the Loess Plateau， accompanied by decrease in some patchy areas； （2） there is apparent topographic variation in change rate of FC， characterized by high increase rate in key areas for vegetation restoration and conservation； （3） the land use/cover change dramatically impacts vegetation cover evolution， compared with areas with consistent land use/cover types， the FC change rate is particularly higher in areas with shifted land use/cove types， especially in Green for Grain Project areas； （4） for areas with consistent land use/cover types during the assessed period， partly due to the higher FC baseline， the mean vegetation cover also increased， however， at a lower rate. It can be concluded that the vegetation restoration and conservation significantly promoted FC in the Loess Plateau during 2000-2008. |
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| Keywords: | vegetation cover topographic variation land use/cover change Loess Plateau |
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