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应用生态学报 ›› 2023, Vol. 34 ›› Issue (7): 1779-1786.doi: 10.13287/j.1001-9332.202307.007

• 研究论文 • 上一篇    下一篇

华北落叶松和白杄径向生长对干旱的生态弹性差异

解萍萍1, 张博奕1, 董一博1, 吕鹏程1, 杜明超1, 张先亮1,2,3*   

  1. 1河北农业大学林学院, 河北保定 071001;
    2河北省城市森林健康技术创新中心, 河北保定 071001;
    3国家林业与草原局塞罕坝森林培育国家长期科研基地, 河北承德 068456
  • 收稿日期:2023-03-10 接受日期:2023-05-19 出版日期:2023-07-15 发布日期:2024-01-15
  • 通讯作者: *E-mail: zhxianliang85@gmail.com
  • 作者简介:解萍萍, 女, 2000年生, 硕士研究生。主要从事树木年轮研究。E-mail: 2697297303@qq.com
  • 基金资助:
    河北省省级科技计划项目(226Z6801G)和亚太森林组织项目(2021P2-CHN)

Differences in ecological resilience of radial growth between Larix principis-rupprechtii and Picea meyeri after drought

XIE Pingping1, ZHANG Boyi1, DONG Yibo1, LYU Pengcheng1, DU Mingchao1, ZHANG Xianliang1,2,3*   

  1. 1College of Forestry, Hebei Agricultural University, Baoding 071001, Hebei, China;
    2Urban Forest Healthy Technology Innovation Center in Hebei Province, Baoding 071001, Hebei, China;
    3National Forestry and Grassland Bureau Saihanba Forest Cultivation National Long-term Scientific Research Base, Chengde 068456, Hebei, China
  • Received:2023-03-10 Accepted:2023-05-19 Online:2023-07-15 Published:2024-01-15

摘要: 为揭示混交林中阳性树种华北落叶松和阴性树种白杄径向生长对气候因子的响应及对干旱的生态弹性差异,构建河北塞罕坝头道沟和山西宁武县、岢岚县3个混交林中华北落叶松和白杄的标准年表,分析气候因子与各年表之间的相关性,研究华北落叶松和白杄应对干旱胁迫的抵抗力(Rc)、恢复力(Rt)、恢复弹力(Rs)差异。结果表明: 在3个混交林中,华北落叶松和白杄径向生长与当年5—7月的平均气温、最高气温呈显著负相关,并且均与5—9月的帕默尔干旱指数(PDSI)呈显著正相关。干旱胁迫导致的树木径向生长下降在不同树种间具有明显差异,这种差异在树种间不同的生理生态调节策略中有所体现。在3个研究地点,白杄的抵抗力均显著高于华北落叶松,而华北落叶松的恢复力、恢复弹力显著高于白杄。因此,白杄比华北落叶松表现出更好的抗旱能力。在全球变暖背景下,相较于白杄,该地区华北落叶松可能面临更大的生长波动风险。

关键词: 径向生长, 华北落叶松, 白杄, 干旱事件, 生态弹性

Abstract: To understand the responses of radial growth to climatic factors and the differences in ecological resilience to drought between a heliophilous species Larix principis-rupprechtii and a shade species Picea meyeri in mixed forests, we developed the tree-ring width chronologies of L. principis-rupprechtii and P. meyeri in three mixed forests based on the samples collected from Toudaogou of Saihanba in Hebei, Ningwu County and Kelan County in Shanxi Province. We analyzed the correlation between climatic factors and various chronologies and examined the differences in resistance (Rc), recovery (Rt), and resilience (Rs) of L. principis-rupprechtii and P. meyeri in response to drought stress. The results showed that the radial growth of L. principis-rupprechtii and P. meyeri was negatively correlated with the mean and maximum air temperature from May to July in three mixed forests, and was positively correlated with the Palmer drought index (PDSI) from May to September. Radial growth decline in trees due to drought stress was significantly different between the two species among the three sites, indicating different physiological and ecological regulation strategies. The resistance of P. meyeri was stronger than that of L. principis-rupprechtii at the three study sites, with stronger resilience and resilient elasticity of L. principis-rupprechtii than P. meyeri. As a result, P. meyeri exhibited greater drought resistance than L. principis-rupprechtii. Under global warming condition, L. principis-rupprechtii might be at greater risk of growth decline than P. meyeri in this region.

Key words: radial growth, Larix principis-rupprechtii, Picea meyeri, drought event, ecological resilience