摘要
为探究气候变化是否影响半干旱区树木的生长和死亡,应用年轮气候学及相关分析方法,对内蒙古大兴安岭南段赛罕乌拉地区山杨的生长和死亡对气候变化的响应进行了研究。结果表明:1954—2012年间,研究区内的山杨径向生长与平均气温及最低气温呈负相关(P<0.05),1993年以后气温显著上升,树木径向生长出现了下降的趋势;山杨径向生长只与当年5月的降水量呈极显著正相关(P<0.01),与其他月份降水量呈正相关但相关性均不显著(P>0.05);气温升高是导致山杨径向生长量降低和死亡率增加的主导因素。
To assess the effects of global warming on tree radial growth and massive mortality in semi-arid forests, the responses of radial growth and death of Populus davidiana to climate change were analyzed using annual climatology and correlation analysis in Saihanwula, southern Greater Xing＇ an Mountains, Inner Mongolia. The results showed that the radial growth of P. davidiana was significantly negatively correlated with the average temperature and minimum temperature （P〈0.05）. The radial growth of P. davidiana decreased when the temperature significantly increased after 1993. The radial growth had significant positive correlation （P〈0.01） with precipitation in May but no such relationship with precipitation in other months. The rising temperature accelerated the reduction of radial growth and the death of P. davidiana.
作者
贺敏
魏江生
石亮
周梅
赵鹏武
HE Min;WEI Jiang-sheng;SHI Liang;ZHOU Mei;ZHAO Peng-wu(College of Grassland Resources and Environment,Inner Mongolia Agricultural University,Hohhot 010011,China;Forestry College of Inner Mongolia Agricultural University,Hohhot 010019,China;Inner Mongolia Saihanwula Forest Ecosystem National Positioning Observation Station.Chifeng 025150.Inner Mongolia,China)
出处
《生态学杂志》
CAS
CSCD
北大核心
2018年第11期3237-3244,共8页
Chinese Journal of Ecology
基金
国家自然科学基金项目(41530747)
内蒙古自治区科技计划项目(20120421)资助
关键词
半干旱区
树木死亡
气候变化
semi-arid area
tree mortality
global warming
