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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Changes in the radial growth of trees in relation to biogeomorphic processes in an old-growth forest on flysch, Czechia
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Changes in the radial growth of trees in relation to biogeomorphic processes in an old-growth forest on flysch, Czechia

机译：捷克，捷克语旧成长林的生物果断过程中树木径向生长的变化

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Tree radial growth is influenced by individual tree abilities, climate, competition, disturbance regimes, as well as biogeomorphic processes - including biomechanical interactions between trees and soil. Trees are actively involved in hillslope dynamics, both responding to and affecting many (bio)geomorphic processes. Using dendrochronology, we studied feedbacks associated with tree-soil-landscape formation, specifically relationships between hillslope processes, biomechanical effects of trees in soils, tree microhabitat conditions and their morphological adaptations, in the flysch zone of the Carpathians. We visually evaluated stem shape, microhabitat conditions and the biomechanical effects of 1663 trees. Cores were taken in four growing directions from 224 individuals of European beech (Fagus sylvaticaL.). In a set of 193 cross-dated beeches, average tree-ring widths and tree eccentricities in all directions were calculated and analysed in relation to the biogeomorphic impacts of trees. Some significant drivers of tree radial growth and sources of stem eccentricity were detected. The radial growth of trees on which deadwood was leaning was markedly limited. In contrast, trees with exposed roots expressed the highest growth rates. This clearly suggests that root exposure may not be an effect of 'exogenous' soil creep, but may rather result from individually intensifying tree growth due to fine-scale disturbance dynamics. The response of biomechanical tree-soil interactions in tree radial growth weakened with increasing stem diameter, reflecting the stabilizing role of larger trees. The significance of calendar year on radial growth suggests seasonality in the dynamic component of soil creep. Tree eccentricity was observed mainly in the downslope direction, which suggests a relatively complex effect of biomechanics on stem tilting. (c) 2020 John Wiley & Sons, Ltd.
机译：树径向生长受到个体树形能力，气候，竞争，扰动制度以及生物果质过程的影响 - 包括树木和土壤之间的生物力学相互作用。树木积极参与山坡动态，既响应和影响许多（生物）地貌过程。使用Dendrochronology，我们研究了与树木 - 景观形成相关的反馈，特别是山坡工艺之间的关系，土壤中树木，树木，树木藏人条件及其形态适应的生物力学效应，在喀尔巴阡山脉的捕捞区。我们视觉评估茎形，微藻条件和1663年的生物力学效应。从224名欧洲山毛榉（Fagus Sylvatical）的224个人的四个生长方向采取了核心。在一组193个交叉日​​期的山毛榉心上，计算并分析所有方向的平均树木宽度和树形偏心，与树木的生物果状影响有关。检测到树径向生长和茎偏心源的一些重要驱动因素。死木倾斜的树木的径向生长明显有限。相比之下，具有暴露根的树木表达了最高的增长率。这清楚地表明，根曝光可能不是“外源”土壤蠕变的影响，而是可能由于细尺的扰动动态而导致树木增长。生物力学树 - 土壤相互作用的响应随着茎直径的增加而减弱，反映了较大树木的稳定作用。日历年对径向增长的意义表明土壤蠕变动态分量中的季节性。树木偏心主要观察到下坡方向，这表明生物力学对茎倾斜的相对复杂的影响。 （c）2020 John Wiley＆Sons，Ltd。

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