Vessel plasticity of European beech in response to thinning and aspect
Vessel plasticity of European beech in response to thinning and aspect
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DOI：
10.1093/treephys/tpw053
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发表时间：
2016-10-01
期刊：
影响因子：
4
通讯作者：
Spiecker, Heinrich
中科院分区：
文献类型：
--
作者：
Diaconu, Daniela;Stangler, Dominik Florian;Spiecker, Heinrich
欧洲山毛榉（Fagus sylvatica L.）对中欧森林和木材部门的重要性需要深入研究，以检查山毛榉森林对不断变化的环境条件的适应能力。木材定量解剖是研究树木结构与功能性状关系的重要工具，但由于方法繁琐，目前对扩散多孔结构阔叶树导电组织的研究还不多。我们的研究目的是测试长宽和变薄对欧洲山毛榉血管解剖特征的影响（血管密度、血管大小、血管总面积、血管组和水力传导性）。通过对斯瓦比亚白杨长期实验研究区树木增量核的分析表明：(1)不同血管性状的变化主要受树轮宽度的控制。此外，我们可以观察到（ii）减薄通过减小船舶尺寸有助于更安全的水运，（iii）方面修改了这些响应。我们的研究结果为欧洲山毛榉木材解剖结构对温暖气候条件的塑性响应提供了新的见解，并证明了森林林分的间伐改变了导水系统，使其更能抵抗水力破坏。
The importance of European beech (Fagus sylvatica L.) for the Central European forest and wood sector demands profound research to examine the adaptive capacity of beech forests to changing environmental conditions. Quantitative wood anatomy is a valuable tool for studying the relation between structural and functional traits of trees, but due to the laborious methodology not many studies have thus far been performed on the conductive tissue of broadleaf tree species with diffuse-porous wood structure. The aim of our research was to test the effects of aspect and thinning on vessel anatomical features of European beech (vessel density, vessel size, total vessel area, vessel groups and hydraulic conductivity). Our analysis of increment cores of trees sampled from a long-term experimental research area on the Swabian Alb showed that (i) the variations in different vessel traits were mainly controlled by tree-ring width. Additionally, we could observe that (ii) thinning contributed to a safer water transport by decreasing vessel size and that (iii) the aspect modified these responses. Our results provide new insights into the plastic response of European beech wood anatomy to warmer climatic conditions and demonstrated that thinning of the forest stands modified the water-conducting system to become more resistant against hydraulic failure.