小五台山华北落叶松径向生长对气候变化的响应  

Radial growth response of Larix principis-rupprechtii to climate change in Xiaowutai Mountain

作　　者：王辉 刘春兰 乔青 张文涛[2] 宁杨翠 董满宇 WANG Hui;LIU Chunlan;QIAO Qing;ZHANG Wentao;NING Yangcui;DONG Manyu(National Engineering Research Center of Urban Environmental Pollution Control,Bejing Municipal Research Institute of Eco-Environmental Protection,Beijing 100037,China;Qingdao Institute of Humanities and Social Sciences,Shandong University,Qingdao 266237,Shandong,China;Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China)

机构地区：[1]北京市生态环境保护科学研究院,国家城市环境污染工程技术研究中心,北京100037 [2]山东大学人文社会科学青岛研究院,山东青岛266237 [3]北京师范大学地理科学学部,北京100875

出　　处：《生态学杂志》2024年第10期2960-2966,共7页Chinese Journal of Ecology

基　　金：国家自然科学青年基金资助项目(41601198);国家自然科学重点基金项目(41630750)资助。

摘　　要：以小五台山优势针叶树种华北落叶松(Larix principis-rupprechtii)为研究对象,建立不同海拔上的树轮宽度年表,剖析树木径向生长对气候要素的响应关系及其稳定性,探讨气候变暖背景下小五台山华北落叶松径向生长的变化。结果表明:(1)小五台山北台低海拔(1380 m)、中海拔(1755 m)、高海拔(2080 m)的华北落叶松径向生长逐年变化基本一致,3个树轮宽度指数年表质量较好,适合用于树轮气候学研究。(2)小五台山华北落叶松径向生长的主要限制因子是降水,主要与前一年9月(P<0.05)、当年2月(P<0.05)、5月降水(P<0.05)显著正相关。(3)1993年气温升高突变之后,华北落叶松径向生长与5月降水的显著正响应关系较为稳定(P<0.01),但对生长季气温负响应增强,特别对5月气温的负响应关系发生显著改变(P<0.05),这主要可能是由于气温升高引起的水分胁迫造成的。因此,未来随着暖干化加剧,小五台山华北落叶松径向生长速率可能总体呈现下降趋势,目前小五台山华北落叶松径向生长对气候要素的响应关系总体较为稳定。We analyzed the response and stability of tree radial growth of Larix principis-rupprechtii,a dominant conifer species in Xiaowutai Mountain,to climate factors based on the ring-width chronologies at different altitudes.The variations of radial growth of L.principis-rupprechtii under the background of climate warming were evaluated.The results showed that:(1)The chronologies of L.principis-rupprechtii were similar at low(1380 m),medium(1755 m),and high altitude(2080 m)on the northern slope of Xiaowutai Mountain.The three chronologies had good quality and were suitable for dendroclimatological study.(2)Precipitation was the main limiting factor for the radial growth of L.principis-rupprechtii.Radial growth was positively correlated with precipitation in September of the previous year(P<0.05),the temperature in February(P<0.05)and May(P<0.01)of the current year.(3)After the abrupt change of temperature in 1993,the positive relationship between chronology and precipitation in May was relatively stable(P<0.01).However,the negative relationship between radial growth and growing season temperature was enhanced,especially in May(P<0.05).This may result mainly from water stress caused by the rising temperatures.Therefore,with the intensification of warming and drying in the future,the radial growth rate of L.principis-rupprechtii may show a downward trend.At present,the radial growth-climate relationship of L.principis-rupprechtii in Xiaowutai Mountain is generally stable.

关 键 词：气温突变 树轮气候学 生长-气候关系 稳定性 

分 类 号：S791.22[农业科学—林木遗传育种]