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应用生态学报 ›› 2021, Vol. 32 ›› Issue (10): 3539-3547.doi: 10.13287/j.1001-9332.202110.010

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闽东南地区马尾松古树对气候变化和虫灾的生态弹性

李颖俊1, 方克艳2*, 白毛伟2, 曹新光2, 董志鹏2, 唐婉儒2, 梅泽鹏2   

  1. 1太原师范学院历史地理与环境变迁研究所, 山西晋中 030600;
    2福建师范大学地理科学学院, 福州 350007
  • 收稿日期:2021-03-31 修回日期:2021-07-02 出版日期:2021-10-15 发布日期:2022-04-15
  • 通讯作者: * E-mail: kfang@fjnu.edu.cn
  • 作者简介:李颖俊, 女, 1984年生, 讲师。主要从事树轮气候与树轮生态学研究。E-mail: chxh-lyj@163.com
  • 基金资助:
    国家自然科学青年基金项目(41801016)、山西省青年科技研究基金项目(201801D221053)和山西省高等学校科技创新项目(STIP2019L0807)资助

Ecological resilience of ancient Pinus massoniana trees to climate change and insect infestation in southeastern Fujian, China

LI Ying-jun1, FANG Ke-yan2*, BAI Mao-wei2, CAO Xin-guang2, DONG Zhi-peng2, TANG Wan-ru2, MEI Ze-peng2   

  1. 1Institution of Historical Geographical and Environment Change, Taiyuan Normal University, Jinzhong 030600, Shanxi, China;
    2College of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
  • Received:2021-03-31 Revised:2021-07-02 Online:2021-10-15 Published:2022-04-15
  • Contact: * E-mail: kfang@fjnu.edu.cn
  • Supported by:
    National Natural Science Youth Foundation of China (41801016), the Natural Science Foundation for Young Scientists of Shanxi Province (201801D221053), and the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (STIP2019L0807).

摘要: 马尾松是我国南方地区广泛分布的先锋造林树种。在全球变暖、气候干旱化和虫灾频发的趋势下,研究马尾松对环境干扰的生态弹性对森林管理有重要意义。本文对福建省仙游县百松村的马尾松古树进行树木年轮样品采集,建立区域首个马尾松树轮宽度标准年表(1865—2014年)。结果表明: 当年7—9月低相对湿度和5—9月极端高温是树木生长的主要限制因素。根据树轮极端窄年确定1869、1889、1986、1991和1993是极端事件年。时序叠加分析发现,极端事件发生前两年的持续低值加剧了极端事件的影响。干旱年份更容易引发虫灾。1889年是受虫灾影响最严重的年份,1986和1991年受到虫灾和干旱气候的双重影响,其余极端年主要受干旱气候的影响。树木对虫灾的抵抗力弱于对干旱事件的抵抗力;除1991年外,树木对虫灾的相对弹性力高于对干旱事件的相对弹性力。1889年的相对弹性力最高,1991年受到连续极端事件的影响,相对弹性力最低。2000年以来研究区干旱化趋势加强,马尾松古树遭受干旱和虫灾的干扰加强,部分树木死亡。

关键词: 树轮, 马尾松, 干旱, 虫灾, 生态弹性

Abstract: Pinus massoniana is a typical pioneer afforestation tree species widely distributed in southern China. It is crucial to study the ecological resilience of P. massoniana to disturbances under global warming, drying, and frequent pest infestation, which can shed lights on forest mana-gements. In this study, tree-ring samples collected from old-growth P. massoniana trees in Baisong Village, Xianyou County, Fujian Province, were used to develop the first standard chronology of P. massoniana ring width (1865-2014) in this region. The results showed that the low relative humidity from July to September and the extremely high temperature from May to September were the main limiting factors for tree growth. The extremely narrow years were identified in 1869, 1889, 1986, 1991 and 1993. These extremely narrow years were exacerbated after the persistently low values of the previously two years via the superposed epoch analysis (SEA). The insect infestations were more likely to happen in dry years. Insect outbreak exerted strongest effect on tree growth in 1889. The narrow tree-rings in 1986 and 1991 were affected by both insect infestation and drought. The other extremely narrow years were mainly affected by drought. The resistance of trees to insect infestation was weaker than that to drought event. The relative resilience of trees to insect infestation was higher than that to drought event, except for 1991. The relative resilience was the highest in 1889 and the lowest in 1991 under the influence of successive extreme events. Under the enhanced drying trend since 2000, more trees had died possibly due to the combined effects of insect infestation and drought.

Key words: tree ring, Pinus massoniana, drought, insect infestation, ecological resilience