2000-2010年锡林郭勒草原植被覆盖时空变化格局及其气候响应  

Spatiotemporal Changes of Vegetation Coverage in Xilin Gol Grassland and Its Responses to Climate Change during 2000-2010

作　　者：杭玉玲 包刚[1,2] 包玉海[1] 布仁吉日嘎拉 Altantuya Dorjsuren 

机构地区：[1]内蒙古师范大学内蒙古自治区遥感与地理信息系统重点实验室,内蒙古呼和浩特010022 [2]内蒙古师范大学地理科学学院,内蒙古呼和浩特010022 [3]内蒙古大学蒙古学学院周边国家研究所,内蒙古呼和浩特010021 [4]蒙古国科学院地理研究所

出　　处：《草地学报》2014年第6期1194-1204,共11页Acta Agrestia Sinica

基　　金：国家自然科学基金项目(41301456);国家"十二五"科技支撑计划项目(2013BAK05B01);内蒙古师范大学"十百千"人才计划项目资助

摘　　要：利用2000-2010年间生长季(4-10月)MODIS NDVI数据和同期气象观测数据,分析锡林郭勒草原植被覆盖度年际和季节变化趋势及其对气温和降水的响应特征。研究表明:生长季平均NDVI总体上呈增加趋势,其变化趋势主要受降水量的控制,年总降水量与NDVI的相关系数达到0.89。从不同季节植被NDVI的变化趋势看,春季NDVI呈上升趋势,夏季和秋季呈下降趋势。与气候因子的相关分析表明,春季和夏季植被覆盖变化趋势主要受降水的控制,而秋季温度的变化对植被生长的促进作用也较明显。在空间分布趋势上,阿巴嘎旗、锡林浩特市、太仆寺旗和多伦县植被覆盖总体上增加趋势较明显,而东乌珠穆沁旗东部、西乌珠穆沁旗的下降趋势最为明显,其气候影响因地区和季节而异。不同草原类型的植被具有不同的变化趋势和受温度和降水量的影响各不相同。The annual and seasonal change trends of vegetation coverage and their response to climate change in Xilin Gol Grasslands during 2000-2010 were examined by employing MODIS NDVI datasets in growing season from April to October and corresponding climatic variables including monthly temperature and precipitation.The results indicated that the growing season NDVI,on the whole,tended to increase from 2000 to 2010.The correlation coefficient between NDVI and precipitation was 0.89,indicating that the precipitation was a primary factor of vegetation dynamics.For seasonal changes,the NDVI experienced the increasing trend in spring and decreasing trend in summer and autumn.Correlation analyses showed that the vegetation variations were mostly controlled by precipitation in spring and summer,while it was regulated by temperature in autumn.The pixel-based analyses displayed that the regions characterized by increases were distributed in Abbaga county,Xilinhaote city,Taipusiqi and Duolun County,and the regions characterized by decline were mostly located at east Ujimqin county,west Ujimqin county in recent 10 years.The vegetation dynamics and their response characteristic to temperature and precipitation differed from different grassland types.

关 键 词：锡林郭勒草原 植被覆盖变化 NDVI 气候响应 

分 类 号：Q948.2[生物学—植物学]