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应用生态学报 ›› 2018, Vol. 29 ›› Issue (5): 1373-1380.doi: 10.13287/j.1001-9332.201805.010

• 稳定同位素生态学专栏 • 上一篇    下一篇

栓皮栎叶片δ13C和δ15N的纬向趋势及其影响因子

刘建锋1,2, 张玉婷1, 倪妍妍3, 黄跃宁1, 江泽平1,3*   

  1. 1中国林业科学研究院林业研究所, 北京 100091;
    2国家林业局林木培育重点实验室, 北京 100091;
    3中国林业科学研究院森林生态环境与保护研究所, 北京 100091
  • 收稿日期:2018-02-05 出版日期:2018-05-18 发布日期:2018-05-18
  • 通讯作者: *E-mail: jiangzp@caf.ac.cn
  • 作者简介:刘建锋,男,1977年生,博士,副研究员.主要从事树木生态地理与生理生态研究. E-mail: liujf2000cn@163.com
  • 基金资助:
    本文由国家自然科学基金项目(41371075)和中央级公益性科研院所基本科研业务费专项(CAFYBB2018ZB001)资助

Latitudinal trends in foliar δ13C and δ15N of Quercus variabilis and their influencing factors.

LIU Jian-feng1,2, ZHANG Yu-ting1, NI Yan-yan3, HUANG Yue-ning1, JIANG Ze-ping1,3*   

  1. 1Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China;
    2State Forestry Administration Key Laboratory of Tree Breeding and Cultivation, Beijing 100091, China;
    3Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China)
  • Received:2018-02-05 Online:2018-05-18 Published:2018-05-18
  • Contact: *E-mail: jiangzp@caf.ac.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41371075) and the Fundamental Research Funds for the Central Non-profit Research Institution of CAF (CAFYBB2018ZB001)

摘要: 以东亚广布种栓皮栎为例,通过对南北样带(26°-40° N)上7个群体的调查取样,并结合2个生活史阶段,探讨栓皮栎碳氮同位素比值随纬度环境的变异规律.结果表明: 在纬向梯度上,栓皮栎叶片δ13C和δ15N随纬度的增加分别呈现非线性的增加和下降趋势,且成年树叶片δ13C和δ15N均显著高于幼树;同时,树龄和纬度对叶片δ15N和δ13C均无显著交互作用,表明栓皮栎幼树和成年树纬向环境变化的响应较为一致.随机森林模型结果显示,栓皮栎叶片δ15N主要受土壤养分,如土壤有机质、磷和氮含量的影响,而叶片δ13C主要受水分因子,如空气相对湿度、降水量等的影响.

Abstract: We aimed to reveal the latitudinal trends in foliar δ13C and δ15N of Quercus variabilis, a widely distributed species in East Asia, associated with two ontogenetic stages (juvenile and mature trees) along a North-South transect (26°-40° N). The results showed that mature trees had higher foliar δ13C and δ15N values than juveniles. Foliar δ13C and δ15N values of trees with both ontogenetic stages were nonlinearly increased and decreased with latitude, respectively. No interaction between ontogenetic stage and latitude for the changes of foliar δ15N and δ13C indicated that both ontogenetic stages across the transect consistently responded to latitudinal environmental variations. Results from the random forest models indicated that foliar δ15N of Q. variabilis was mainly affected by soil nutrient contents, e.g., soil organic matter, phosphorus, nitrogen, whereas dominated factors for foliar δ13C were related to moisture, such as relative humidity, precipitation of growing season.