植物生态学报 ›› 2022, Vol. 46 ›› Issue (6): 678-686.DOI: 10.17521/cjpe.2022.0005

所属专题: 生态化学计量 植物功能性状

• 研究论文 • 上一篇    下一篇

温带森林阔叶植物幼苗叶经济谱及其与防御性状的关系

程思祺1, 姜峰1, 金光泽1,2,*()   

  1. 1东北林业大学生态研究中心, 哈尔滨 150040
    2东北林业大学森林生态系统可持续经营教育部重点实验室, 东北亚生物多样性研究中心, 哈尔滨 150040
  • 收稿日期:2022-01-06 接受日期:2022-04-28 出版日期:2022-06-20 发布日期:2022-06-09
  • 通讯作者: 金光泽
  • 作者简介:*(taxus@126.com) ORCID:金光泽: 0000-0002-9852-0965
  • 基金资助:
    国家自然科学基金(32071533)

Leaf economics spectrum of broadleaved seedlings and its relationship with defense traits in a temperate forest

CHENG Si-Qi1, JIANG Feng1, JIN Guang-Ze1,2,*()   

  1. 1Center for Ecological Research, Northeast Forestry University, Harbin 150040, China
    2Key Laboratory of Sustainable Forest Ecosystem Management -Ministry of Education, Northeast Asia Biodiversity Research Center, Northeast Forestry University, Harbin 150040, China
  • Received:2022-01-06 Accepted:2022-04-28 Online:2022-06-20 Published:2022-06-09
  • Contact: JIN Guang-Ze
  • Supported by:
    National Natural Science Foundation of China(32071533)

摘要:

植物叶片功能性状之间的权衡关系一直是生态学研究的热点问题。其中叶经济谱相关性状的研究较多, 但叶片防御性状方面的研究, 尤其是幼苗阶段的研究较少。该研究以黑龙江凉水国家级自然保护区典型阔叶红松(Pinus koraiensis)林和谷地云冷杉林内共有的8种阔叶乔木和11种阔叶灌木物种的幼苗叶片为研究对象, 通过测定5个叶经济谱性状和4个叶片防御性状, 分析了叶性状在不同生活型、林型间的差异以及性状之间的协调关系。结果表明: 所有叶片性状在乔木和灌木幼苗之间不存在显著差异, 谷地云冷杉林中的幼苗的叶总酚含量和单宁含量显著高于阔叶红松林中的幼苗, 其原因为谷地云冷杉林林下光照强度弱于阔叶红松林, 且空气和土壤湿度较高, 该环境更有利于自然天敌的聚集, 可能有更强的天敌破坏效应, 而这种更强的生物相互作用反过来驱动幼苗提高其防御能力; 幼苗叶绿素含量与比叶面积呈极显著正相关关系, 与叶氮含量、叶磷含量呈显著正相关关系; 幼苗叶氮含量与叶磷含量呈显著正相关关系; 幼苗叶防御性状之间呈显著正相关关系; 幼苗叶绿素含量与叶总酚含量、单宁含量和类黄酮含量呈显著负相关关系, 叶氮含量与叶总酚含量、单宁含量呈显著负相关关系, 与类黄酮含量呈极显著负相关关系; 说明幼苗叶经济谱性状与防御性状之间存在权衡关系, 即对叶片碳代谢性状的更多投资意味着对叶防御性状更少的投资; 乔、灌木幼苗具有相似的资源利用策略。

关键词: 权衡策略, 叶经济型谱, 叶片防御, 幼苗, 主成分分析

Abstract:

Aims Understanding the trade-offs between leaf functional traits has long been a hot topic in ecological research.

Methods In a broadleaved Korean pine (Pinus koraiensis) forest and a spruce-fir valley forest in the Liangshui National Nature Reserve, Heilongjiang Province, we measured 5 leaf economic traits and 4 leaf defense traits for seedlings of 8 tree species and 11 shrub species, to evaluate trait variation across species life forms and forest types, as well as trait correlations.

Important findings There was no significant difference in leaf traits between the seedlings of trees and shrubs. The total phenolic content and tannin content of plants in the spruce-fir valley forest were significantly higher than those in broadleaved Korean pine forest. Compared with broadleaved Korean pine forest, the spruce-fir valley forest has lower under-canopy light intensity but higher air and soil moisture, which is more conducive to the aggregation of natural enemies. This stronger biological interaction may in turn drives seedlings to invest more on their defense traits in spruce-fir forest. Leaf chlorophyll content was positively correlated with specific leaf area, leaf nitrogen and phosphorus content. Leaf nitrogen content was positively correlated with leaf phosphorus content. Moreover, there was a significant and positive correlation between leaf defense traits. Leaf chlorophyll and nitrogen content were negatively correlated with total phenolic content, tannin content and content of flavonoids. This suggests the existence of a trade-off between leaf carbon economics and defense. The seedlings of trees and shrubs had similar carbon economics strategies. The results of this study have implications for predicting forest dynamics and community composition based on leaf functional traits.

Key words: trade-off strategies, leaf economics spectrum, leaf defense, seedlings, principal component analysis