小兴安岭不同径级白桦枝叶性状变异及权衡

解书文; 金光泽; 刘志理

doi:10.12171/j.1000-1522.20210463

小兴安岭不同径级白桦枝叶性状变异及权衡

doi: 10.12171/j.1000-1522.20210463

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，黑龙江哈尔滨 150040

基金项目: 国家重点研发青年科学家项目（2022YFD2201100），国家自然科学基金项目（31971636），中央高校基本科研业务费专项（2572022DS13）

详细信息

作者简介:
解书文。主要研究方向：森林生态。Email：793693504@qq.com　地址：150040 黑龙江省哈尔滨市和兴路26号东北林业大学林学院

责任作者:
刘志理，教授。主要研究方向：森林生态。Email：liuzl2093@126.com　地址：同上

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出版历程
- 收稿日期: 2021-11-15
- 修回日期: 2022-01-14
- 网络出版日期: 2023-04-08

Variations and trade-offs of twig-leaf traits for Betula platyphylla with different diameter classes in Xiaoxing’an Mountains of northeastern China

Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management of Ministry of Education, Northeast Forestry University, Harbin 150040, Heilongjiang, China

摘要

摘要: 目的植物可以通过调整自身性状变化从而更有效地利用资源。探究不同径级植物枝叶性状间的变异及其相关关系，对理解植物功能性状种内变异及对资源的获取策略具有重要意义。方法以黑龙江凉水国家级自然保护区阔叶红松林中的白桦为研究对象，选取3个径级（小树、中等树、大树）的样树，测定其枝横截面积、单叶面积、总叶面积、总叶干质量、枝干质量和出叶强度。采用单因素方差分析检验枝叶性状在不同径级间是否存在显著差异；以标准化主轴估计检验径级对白桦枝叶性状间的相关关系是否存在影响。结果随着径级的增加，枝横截面积呈上升趋势，单叶面积和总叶面积呈下降趋势，而总叶干质量、枝干质量、出叶强度不存在显著差异。不同径级白桦的枝横截面积与单叶面积、总叶面积和总叶干质量呈显著正相关，与出叶强度呈显著负相关，其中，小树和大树枝横截面积与总叶面积和总叶干质量呈接近1的等速生长关系，而中等树呈接近1.5的异速生长关系；单叶面积与出叶强度显著负相关，呈异速生长关系。径级对白桦枝叶性状相关关系的斜率或截距存在显著影响。结论在同一群落内，不同径级的白桦枝叶性状存在差异是其自身的一种资源获取策略，且枝叶性状为了获得有效的资源而协同变化。
- 白桦 /
- 径级 /
- 枝叶性状 /
- 相关性 /
- 变异 /
- 权衡
Abstract: Objective Plants can use resources more efficiently by adjusting their own traits. Exploring the variation and correlation between twig and leaf traits of plants with different diameter classes is of great significance for understanding the intraspecific variation of plant functional traits and the resource acquisition strategies of plants. Method In Liangshui National Nature Reserve of Heilongjiang Province of northeastern China, three diameter classes of Betula platyphylla were selected (including small tree, middle tree and large tree). The twig cross-sectional area, individual leaf area, total leaf area, total leaf dry mass, twig dry mass and volume-based leafing intensity were measured in different diameter classes. One-way analysis of variance (ANOVA) was used to test whether there were significant differences in twig-leaf traits among varied diameter classes. The method of standardized main axis estimation was used to test whether the diameter class had an effect on the correlation between the twig and leaf traits. Result With the increase of diameter class, twig cross-sectional area showed an upward trend, individual leaf area and total leaf area showed a downward trend, but there was no significant difference in total leaf dry mass, twig dry mass, volume-based leafing intensity. The twig cross-sectional area was significantly positively correlated with individual leaf area, total leaf area and total leaf dry mass, but was significantly negatively correlated with volume-based leafing intensity, among them, the cross-sectional area of small trees and large trees had an isokinetic growth relationship of close to 1 with the total leaf area and total leaf dry mass, while the medium tree had an allometric growth relationship close to 1.5; individual leaf area exhibited significantly negative correlations with volume-based leafing intensity, showing an allometric relationship; the diameter class had a significant effect on the slope or intercept of the correlations between twig-leaf traits. Conclusion Within the same community, the difference in branch and leaf traits among different diameter classes of Betula platyphylla is its own resource acquisition strategy, and the branch and leaf traits undergo collaborative changes in order to obtain effective resources.
- Betula platyphylla /
- diameter class /
- twig-leaf trait /
- correlation /
- variation /
- trade-off

HTML全文

图 1 不同径级白桦枝叶性状的差异

不同字母表示差异显著（P < 0.05）。Different letters indicate significant difference at P < 0.05 level.

Figure 1. Differences in twig-leaf traits of Betula platyphylla in varied diameter classes

下载: 全尺寸图片幻灯片

图 2 白桦枝叶性状间相关关系

***表示枝叶性状间显著相关（P < 0.001）。椭圆越窄，表示相关性越强。*** indicates significant correlation between twig-leaf traits (P < 0.001). The narrower the ellipse is, the stronger the correlation is.

Figure 2. Correlation between twig-leaf traits of Betula platyphylla

下载: 全尺寸图片幻灯片

图 3 不同径级白桦枝叶性状相关关系的差异性

P < 0.05表示不同径级间斜率存在显著差异，P > 0.05表示不同径级间存在共同斜率（即不存在显著差异）。P < 0.05 means that slopes between different diameter classes exist significant difference. P > 0.05 means common slope between different diameter classes (not exist significant difference).

Figure 3. Differences in correlations between twig-leaf traits of Betula platyphylla in varied diameter classes

下载: 全尺寸图片幻灯片

表 1 样树胸径信息

Table 1. Information of diameter at breast height (DBH) for sample trees

胸径 DBH	小树 Small tree	中等树 Middle tree	大树 Large tree
平均值 Mean/cm	5.05	18.83	40.99
标准差 SD/cm	0.31	1.37	2.18
变异系数 Coefficient of variation/%	6.00	7.00	5.00

下载: 导出CSV

表 2 白桦枝叶性状与胸径、光照之间的广义线性模型

Table 2. Generalized linear models among twig-leaf traits, DBH and light intensity for Betula platyphylla

性状 Trait	参数 Parameter	胸径 DBH	光照强度 Light intensity	截距 Intercept
枝横截面积 Twig cross-sectional area （TCA）	回归系数 Regression coefficient	0.02	0.12	3.78
枝横截面积 Twig cross-sectional area （TCA）		0.17	0.09	< 0.001
单叶面积 Individual leaf area （ILA）	回归系数 Regression coefficient	−0.05	0.24	9.40
单叶面积 Individual leaf area （ILA）		< 0.01	< 0.01	< 0.001
总叶面积 Total leaf area （TLA）	回归系数 Regression coefficient	−0.68	1.03	70.95
总叶面积 Total leaf area （TLA）		< 0.01	0.30	< 0.001
总叶干质量 Total leaf dry mass （TLDM）	回归系数 Regression coefficient	−0.01	0.01	0.75
总叶干质量 Total leaf dry mass （TLDM）		0.02	0.22	< 0.001
枝干质量 Twig dry mass （TDM）	回归系数 Regression coefficient	0.00	0.01	0.25
枝干质量 Twig dry mass （TDM）		0.04	0.21	< 0.001
出叶强度 Volume-based leafing intensity （LIV）	回归系数 Regression coefficient	−0.00	−0.00	0.15
出叶强度 Volume-based leafing intensity （LIV）		0.19	0.39	< 0.001

下载: 导出CSV

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