期刊论文

Lin, H.

中文

生态学报

1000-0933

2014

34

17

5007-5020

10.5846/stxb201305251179

国家“十二五”高技术研究发展计划课题（2012AA102001）；

本校为第一且通讯机构

植被是陆地生态系统的主体，分析长时期植被覆盖变化，有助于揭示陆地生态环境的演变规律。研究以京津风沙源重点治理区的MODIS02B产品为数据源，通过数据处理获得2000—2012年的NDVI( Normalized difference vegetation index)时序数据集，采用线性趋势分析、标准差、Hurst指数和相关系数等方法，分析京津风沙源重点治理区植被覆盖的时空变化特征及影响因子。结果显示：(1)近13年来，治理区植被覆盖总体呈上升趋势(R~2=0.70) ，2012年NDVI值达最大值0.324，比2000年增加了135.62%。但增加速率和幅度各异：北部干旱区(Bbghq)增加速度最快，浑善达克区(Hsdkq)次之，农牧交错区(Nmjcq)植被变化相对...

Due to grassland degradation and expansion of desertification, the Northern China continuously suffered from several sandstorms in the spring of 2000. In order to control the desertification trend in Beijing and surroundings and improve the ecological condition and environment in Beijing-Tianjin Sandstorm Source Region (BTSSR), the Chinese government launched the Beijing-Tianjin Sandstorm Source Control Program in July 2000. This program has been working for thirteen years. However, it is unknown that how the vegetation and ecosystems were rest...