植物生态学报 ›› 2023, Vol. 47 ›› Issue (11): 1540-1550.DOI: 10.17521/cjpe.2022.0460

• 研究论文 • 上一篇    下一篇

东北温带森林5个羽状复叶树种叶成本-效益关系比较

刘艳杰1, 刘玉龙2, 王传宽1, 王兴昌1,*()   

  1. 1东北林业大学生态研究中心, 森林生态系统可持续经营教育部重点实验室, 哈尔滨 150040
    2黑龙江省生态研究所, 哈尔滨 150040
  • 收稿日期:2022-11-14 接受日期:2023-05-10 出版日期:2023-11-20 发布日期:2023-06-25
  • 通讯作者: 王兴昌 ORCID:0000-0002-6502-1422; (xcwang_cer@nefu.edu.cn)
  • 基金资助:
    国家自然科学基金(32171765)

Comparison of leaf cost-benefit relationship for five pinnate compound-leaf tree species in temperate forests of northeast China

LIU Yan-Jie1, LIU Yu-Long2, WANG Chuan-Kuan1, WANG Xing-Chang1,*()   

  1. 1Center for Ecological Research, Key Laboratory of Sustainable Forestry Ecosystem Management-Ministry of Education, Northeast Forestry University, Harbin 150040, China
    2Heilongjiang Ecological Institute, Harbin 150040, China
  • Received:2022-11-14 Accepted:2023-05-10 Online:2023-11-20 Published:2023-06-25
  • Contact: WANG Xing-Chang(xcwang_cer@nefu.edu.cn)
  • Supported by:
    National Natural Science Foundation of China(32171765)

摘要:

为阐明复叶树种叶成本-效益关系和叶碳经济, 该研究测定了帽儿山森林生态站5个典型羽状复叶木本树种的叶片和叶轴性状, 通过标准主轴回归和方差分析研究不同复叶树种的叶片和叶轴之间的异速生长关系。主要结果: 叶面积与叶轴质量之间存在显著的异速生长关系, 异速生长指数更接近于West, Brown and Enquist (WBE)模型的理论值(3/4), 不符合几何相似模型的理论值(2/3)。但叶片质量与叶轴质量之间大多为等速生长关系。叶面积、叶片质量与叶轴长度之间均存在显著的异速生长关系, 5个树种的共同异速生长指数分别为1.853和2.322。叶轴质量与叶轴长度为显著的异速生长关系, 异速生长指数普遍大于2, 表明叶轴长度增长实现的空间扩展收益增长低于叶轴质量成本增长速度。叶面积与叶片质量、复叶质量之间显著的异速生长关系表明复叶的收益递减规律。二回羽状复叶(楤木(Aralia elata))比一回羽状复叶具有更高的碳收益投资比。这些结果表明, 羽状复叶树种叶片与叶轴之间表现为明显的异速生长关系, 适宜生长较长的叶轴满足光截获需求, 但叶轴伸长导致的投资成本快速增加限制了复叶面积的扩展。

关键词: 复叶, 生物量分配, 叶大小, 叶轴, 异速生长

Abstract:

Aims Explore the allometry between lamina and rachis and clarify the leaf cost-benefit relationship of pinnate compound-leaf temperate tree species.

Methods In the Maoershan Forest Ecosystem Research Station, Heilongjiang Province, the lamina and rachis traits were measured for five pinnate compound-leaf species (Fraxinus mandshurica, Juglans mandshurica, Phellodendron amurense, Maackia amurensisand Aralia elata), and the allometry between lamina and rachis was developed by using the standardized major axis regression.

Important findings There was a significant allometric scaling between lamina area and rachis mass, and the slope was closer to the theoretical value of 3/4 of the West, Brown and Enquist (WBE) model than to the theoretical value of 2/3 of the geometric similarity model. However, there was an isometric relationship between lamina mass and rachis mass in most cases. There were significant allometric relationships between compound-leaf area and rachis length and between lamina mass and rachis length, and the common slopes for all the species were 1.853 and 2.322, respectively. There was a significant allometry between rachis mass and rachis length, with all the allometric exponents being greater than 2, indicating that the increasing rate of spatial expansion benefit achieved by the rachis lengthening was lower than the increasing rate of lamina mass cost. Significant allometric scaling between lamina area and lamina mass and between lamina area and compound-leaf mass indicated a trend of diminishing returns in compound-leaves. The bipinnate compound-leaves of A. elata had a higher carbon return to investment ratio than the pinnate ones of the other species. In summary, the significant allometric scaling between lamina and rachis of the pinnate compound-leaf species suggests rachis elongation helps light acquisition, but the increase in investment cost caused by the rachis elongation limits the expansion of the compound leaf area.

Key words: compound leaf, biomass allocation, leaf size, rachis, allometry