秦岭东缘龙池曼华山松径向生长对多源数据气候因子的响应  

Responses of Pinus armandii Franch ring growth to climatic factors from multi⁃source at the top of Longchiman in the eastern Qinling Mountains,China

作　　者：侯德乐 李金宽 彭剑峰[1,2] 李佳欣 彭猛 韦晓旭 马永涛 吕润生[4] HOU Dele;LI Jinkuan;PENG Jianfeng;LI Jiaxin;PENG Meng;WEI Xiaoxu;MA Yongtao;LYU Runsheng(College of Geography and Environmental Science,Henan University,Kaifeng 475004,China;Henan Key Laboratory of Earth System Observation and Modeling,Henan University,Kaifeng 475004,China;Henan Academy of Forestry,Zhengzhou 450002,China;Forestry Bureau of Songxian County,Luoyang 471400,China)

机构地区：[1]河南大学地理与环境学院,开封475004 [2]河南省地球系统观测与模拟重点实验室,开封475004 [3]河南省林业科学研究院,郑州450002 [4]嵩县林业局,洛阳471400

出　　处：《生态学报》2024年第3期1191-1202,共12页Acta Ecologica Sinica

基　　金：国家重大研究计划(2018YFA0605601);国家自然科学基金资助项目(42077417,41671042)。

摘　　要：全球变暖影响着树木的结构和功能,反之影响着树木生长对气候变化的响应。秦岭是我国南北方的分界线,同时也是亚热带气候和温带气候的过渡带,作为区域气候变化的敏感地带,已有许多学者在该地区开展树轮气候学研究。基于秦岭东缘伏牛山龙池曼顶部的华山松(Pinus armandii Franch.)树轮宽度建立了不同年表,分析该地区树木生长对嵩县站器测气象数据(SX)和格点气象数据(CHN)的响应。结果表明:(1)树轮差值年表(RES)的统计参数优于标准年表(STD),含有较丰富的环境信息,适于树轮气候学研究;(2)RES年表与SX器测数据和CHN格点数据的相关分析结果都表明,龙池曼顶部华山松径向生长受上一年的气候条件影响较大,且对气温的响应高于降水,与上年7—8月和当年1月的平均气温以及上年5月降水量呈显著负相关,与上年8月的降水呈显著正相关;(3)CHN格点数据能更全面地揭示月平均最高温对华山松径向生长的影响,RES年表对两个数据集当年夏季(7—9月)的降水量都呈负相关,但达到显著负相关的月份有差异;(4)多源气候数据均表明该地区存在暖干化趋势,升温不利于华山松的生长。若未来暖干化持续,秦岭东缘龙池曼地区华山松生长会进一步受限,从而影响该地区的森林植被生产力和固碳潜力。Global warming affects the structure and function of trees,which in turn affects the response of tree growth to climate change.In this study,we chose the eastern Qinling Mountains as the research area,because the Qinling Mountains are not only the dividing line between the north and south of China,but also the transitional region between the subtropical and temperate climate.As a sensitive zone of climate change,many scholars have carried out dendroclimatology research in this area.Therefore,we collected P.armandii core samples at an altitude of more than 2032m.Different chronologies were established based on the tree-ring width of P.armandii at the top of Longchiman of Funiu Mountain in the eastern edge of the Qinling Mountains to analyze the responses of tree growth to instrumental meteorological data from Songxian station(SX)and 1km resolution gridded data(CHN)in this area.The results showed that:(1)the statistical parameters of the tree-ring residual chronology(RES)were better than those of the standard chronology(STD),which contained richer environmental information and were suitable for the study of dendroclimatology.(2)The results of the correlation analysis of RES with both SX and CHN showed that the radial growth of P.armandii at the top of Longchiman was greatly affected by the climatic conditions of the previous year,and responded more to temperature than precipitation,with a significantly negative correlation with the average temperature in July-August of the previous year and January of the current year,as well as the precipitation in May of the previous year,and a significantly positive correlation with the precipitation in August of the previous year.(3)CHN provided a fuller picture of the effect of mean monthly maximum temperature on radial growth of P.armandii.The RES had a negative correlation with precipitation in summer(July—September)of the current year in both datasets,but there were differences in the months that reached a significantly negative correlation.(4)Multi-source climatic data s

关 键 词：华山松 多源气候数据 树轮宽度年表 气候响应 秦岭东缘 

分 类 号：P46[天文地球—大气科学及气象学]