基于生态分区的内蒙古地区植被覆盖变化及其影响因素研究  

Research on Vegetation Changes and Influence Factors Based on Eco-geographical Regions of Inner Mongolia

作　　者：张清雨[1,2] 赵东升[1] 吴绍洪[1] 戴尔阜[1] 

机构地区：[1]中国科学院地理科学与资源研究所,北京100101 [2]中国科学院大学,北京100049

出　　处：《地理科学》2013年第5期594-601,共8页Scientia Geographica Sinica

基　　金：国家重点基础研究发展计划(2011CB403206);国家十二五科技支撑计划(2012BAC19B04)项目支持

摘　　要：基于GIMMS数据和MODIS数据反演1982～2011年内蒙古生长季NDVI，分析内蒙古不同生态区内NDVI变化时空特征，探讨自然和人为因素对NDVI的影响。结果表明：30a来内蒙古生长季平均NDVI整体呈增加趋势，分布在呼伦贝尔、锡林郭勒典型草原的部分地区NDVI有下降趋势。大部分地区NDVI与年降水量呈显著相关，与温度的相关性不显著；近30a人类活动对植被NDVI的影响程度逐渐增强，其中人类活动在西辽河平原、大兴安岭南端草原区以及华北山地落叶阔叶林区促进植被生长，在内蒙古东北部草原区抑制植被生长。This study constructed growing season NDVI in 1982-2011 based on GIMMS and MODIS data in Inner Mongolia. The spatial and temporal characteristics of inter-annual NDVI changes were analyzed and natural and human influence factors were investigated in different eco-geographical regions. The results show that,linear regression equation is a good method to modify NDVI in GIMMS and MODIS remote images. The growing season NDVI increased on the whole and the increase rate was 0.265% and displayed significant inter-annual fluctuations in the past 30 years. NDVI decreased significantly in 1982-1986, then increase significantly during 1997-2002, and relative steady phases were in 1986-1997 and in 2002-2011. NDVI that increased most significantly were located in the northern of Inner Mongolia. However, there were 5.075% regions decreased which mainly distributed on typical steppe in Hulun Buir and Xilin Gol. NDVI change rates of different vegetations from eco-geographical region were in the following order： farm and shrub 〉 forest 〉 farm and typical steppe 〉 meadow and meadow steppe 〉 typical steppe and farm 〉 typical steppe 〉 desert steppe 〉 desert. NDVI change rate was fastest in IIC2 eco-geographical region which was 0.277 and slowest in IID2 eco-geographical region which was 0.001. NDVI was significantly correlated with precipitation in most regions and presented obvious strap regularity from east to west, which was negative correlation in the eastern region, positive correlation in center region and no correlation in the western region. However, great differences existed in different eco-geographical region of Inner Mongolia. Eco-geographical region of IIA3, IA1 had biggest correlation which more than 0.5 but significant negative correlate between NDVI and precipitation in all regions. NDVI had little significantly positive correlations with temperaaxre in Inner Mongolia whose correlations were less than 0.2 in most eco-geographical regions. However, NDVI exhibited significant positive correlations with

关 键 词：生态地理分区 NDVI 内蒙古 影响因素 相关系数 

分 类 号：K903[历史地理—人文地理学]