东北3种枫木质部解剖特征比较及其坡位气候关系

IF 2.7 3区农林科学 Q1 FORESTRY

Dendrochronologia Pub Date : 2025-04-30 DOI:10.1016/j.dendro.2025.126347

Kexin Jin , Jia Yao , Yuxin Bai , Zhulin Li , Mengguo Nie , Xingxing Li , Xiaochun Wang

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引用次数: 0

摘要

•三种槭属植物的木质部解剖特征各不相同。•在不同的斜坡位置，木质部解剖特征的水力安全性和效率之间存在权衡。•整个生长季节（7 - 9月）的温度和降水对木质部解剖性状有显著影响，且不同坡位的响应模式存在明显差异。摘要槭属是中国东北温带森林的一个重要类群，但不同槭属木质部解剖特征对气候条件的响应研究较少。本研究利用木材解剖技术，研究了两个坡位上mandshuricum、tartaricum和tegmentosum的径向生长和木质部导管特征对气候因子的响应。结果表明：毛竹的环宽（RW）最宽，血管大而少；水杨花的RW最窄，血管虽小但较多。水曲柳的导管密度（VD）和理论水电导率（Ks）在中坡显著高于下坡。中坡柽柳的Dh显著高于下坡，而VD则相反。中坡的白沙草的Ks和Dh显著高于下坡。而中间坡的VD明显较低。7 ~ 9月，水曲柳的RW与水分条件呈极显著相关。下坡月最高温度（Tmax）约束了沙草的Ks和Dh，而中坡的血管特征主要与Tmax正相关。柽柳的RW与中坡月最低温度（Tmin）呈正相关，柽柳的RW受Tmax的抑制，Ks受Tmin的影响。该研究为了解不同坡位和树种对气候条件的响应机制提供了重要的科学依据。

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Comparison of xylem anatomical traits among three maple species and their climate relationships across slope positions in northeast China

•
Xylem anatomical characteristics vary among the three Acer species.

•
At different slope positions, a trade-off exists between hydraulic safety and efficiency in xylem anatomical characteristics.

•
The temperature and precipitation throughout the growing season (July-September) exert a significant impact on the xylem anatomical traits, and distinct discrepancies are observed in the response patterns across varying slope positions.

The Acer genus is a major group in temperate forests of northeast China, but studies on how the xylem anatomical features of different Acer species respond to climate conditions are few. This study uses wood anatomy techniques to investigate the radial growth and xylem vessel features of A. mandshuricum, A. tataricum and A. tegmentosum at two slope positions in response to climate factors. The results shows that the ring width (RW) of A. tegmentosum is the widest, with large but few vessels. The RW of A. tataricum is the narrowest, with small but more vessels. The vessel density (VD) and theoretical water conductivity (Ks) of A. mandshuricum are significantly higher on middle slope than on downhill slope. The Dh of A. tataricum is significantly higher on the middle slope than on the downhill slope, but the VD was the opposite. The Ks and Dh of A. tegmentosum are significantly higher on the middle slope than on the downhill slope. However, the VD is significantly lower on the middle slope. The RW of A. mandshuricum is significantly correlated with water conditions from July to September. The Ks and Dh of A. tegmentosum are constrained by the monthly maximum temperature (T_max) on the downhill slope, while the vessel characteristics on the middle slope are mainly positively correlated with T_max. The RW of A. tegmentosum is positively correlated with monthly minimum temperature (T_min) on the middle slope, while the RW of A. tataricum is inhibited by T_max, and the Ks is affected by T_min. This study provides an important scientific basis for understanding the mechanisms by which different slope positions and species of trees respond to climate conditions.

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来源期刊

Dendrochronologia FORESTRY-GEOGRAPHY, PHYSICAL

CiteScore

5.50

自引率

13.30%

发文量

审稿时长

22.8 weeks

期刊介绍： Dendrochronologia is a peer-reviewed international scholarly journal that presents high-quality research related to growth rings of woody plants, i.e., trees and shrubs, and the application of tree-ring studies. The areas covered by the journal include, but are not limited to: Archaeology Botany Climatology Ecology Forestry Geology Hydrology Original research articles, reviews, communications, technical notes and personal notes are considered for publication.