摘要
蒙古栎是东北森林中最重要的阔叶树种之一.本研究利用树木年代学方法研究中国东北南部千山地区蒙古栎的径向变化,结合1951—2010年的温度和降水等气象数据,利用相关函数分析了树木生长与气候变化的关系,揭示蒙古栎径向生长对气候响应规律.结果表明:研究区4—7月的降水量与蒙古栎年轮宽度呈显著正相关,是限制该地区蒙古栎径向生长的主要限制因子;5月极端最高温度与蒙古栎年轮宽度呈显著负相关,也是影响蒙古栎生长的关键因素.研究期间,蒙古栎年轮宽度与4月降水量的相关显著且稳定,自20世纪80年代开始蒙古栎径向生长对夏季温度的响应敏感性逐渐减弱,对温度的响应表现出从响应夏季温度向响应春季温度的转变.
Mongolian oak is one of the most important broad-leaved tree species in forests, North- east China. Based on the methodology of dendrochronology, the variations of tree ring radial growth of Mongolian oak in Qianshan Mountains, south of Northeast China, were analyzed. Combined with the temperature and precipitation data from meteorological stations since 1951, the relationships be- tween standardized tree ring width chronology and main climatic factors were analyzed. In this re- gion, the precipitation between April and July of the current year had an significant relationship with the tree ring width of Mongolian oak, and was the main factor limiting the radial growth. The extreme maximum temperature of May was also a key factor influencing the tree ring width, which had a significant on the tree ring width of Mongolian oak. The precipitation in April had a signifi- cant and stable relationship with the growth of Mongolian oak since the 1950s. The ' divergence problem' was found in the study area, which the sensitivity of tree growth to summer temperature reduced since the 1980s. The tree growth response to temperature showed a seasonal change from summer to spring.
出处
《应用生态学报》
CAS
CSCD
北大核心
2014年第7期1841-1848,共8页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目(31100327
41271066
41071035)
沈阳农业大学"天柱山学者"计划项目
中国森林生态系统监测网络CFERN&GENE奖励计划项目
辽宁省建筑生态物理技术与评价重点实验室开放基金项目(JZ-200909)资助
关键词
蒙古栎
年轮
气候变化
径向生长
气候响应
Mongolian oak
tree ring
climate change
radial growfla
climate response.