基于生态地理分区的大兴安岭植被物候时空变化  

Spatiotemporal variation of vegetation phenology in the Daxing'an Mountains stratified by eco-geographical regions

作　　者：浮媛媛 赵建军[1] 张洪岩[1] 贺红士[1] 郭笑怡[1] 

机构地区：[1]东北师范大学地理科学学院,长春130024

出　　处：《应用生态学报》2016年第9期2797-2806,共10页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(41501449);吉林省科技发展计划项目(20150520069JH);中央高校基本科研业务费专项资金项目(2412016KJ026;14QIVJJ025);中国博士后科学基金项目(2014M561272);吉林省博士后科研项目启动经费(RB201353)资助~~

摘　　要：植被与气候的关系十分密切,植被物候可作为全球气候变化的指示器.大兴安岭位于我国最北部,对气候变化较为敏感,研究该区植被物候的时空变化对评估全球变化对陆地生态系统的影响具有重要意义.依据中国生态地理区划图,将大兴安岭划分为4个生态研究区域,本文利用GIMMS NDVI 3g遥感数据集分析1982—2012年大兴安岭整体及各生态地理分区植被物候变化.结果表明:研究期间,所有分区植被生长季开始日期均表现为提前趋势,生长季结束日期均表现为推迟趋势.植被物候对气候因子变化敏感,尤其是对气温的敏感程度高于降水,其中,北段山地落叶针叶林区植被生长季开始日期与春季温度呈显著负相关;除南段草原区外,其他3个分区植被生长季结束日期均与秋季降水呈显著负相关.从整体来看,植被物候随海拔、纬度的变化趋势明显.Vegetation phenology is a good indicator of climate change, because of the close correla- tion between vegetation and climate. The Daxing＇ an Mountains, located in Chinese northernmost region, are more sensitive to climate change. Researching the spatio-temporal variation of vegetation phenology in this region is of great significance for assessing the influence of global change on ter- restrial ecosystem. According to the eco-geographical zoning of China, the Daxing＇ an Mountains can be divided into for four eco-geographical regions. In this study, the spatial distribution and dy- namics of vegetation phenology in the Daxing＇ an Mountains were analyzed using 8-kin resolution GIMMS NDVI 3g dataset from 1982 to 2012. Results showed that the start of growing season in all partitions exhibited an advancing trend, and the end of growing season in all partitions had an ex- tending trend. Vegetation phenology which was sensitive to the change of meteorological factors had a stronger correlation with temperature than with precipitation for all four eco-geographical regions. There was a significant negative correlation between the start of growing season in the northern re- gion and spring temperature. Except for the south of the Daxing＇ an Mountains, the ending days of growing season in the other three eco-geographical regions had significant negative correlations with summer precipitation. The change of vegetation phenology in the whole study was obvious along with altitude and latitude.

关 键 词：大兴安岭 GIMMS NDVI 3G 植被物候 生态地理分区 

分 类 号：Q948[生物学—植物学]