This study investigated the wind-driven sway patterns of 10 trees in an even-aged lodgepole pine stand ten years following thinning. This stand was previously investigated by Rudnicki (2003), who documented the changed patterns of mapped stem frequency distribution of boles on half of the trees shortly after thinning. Ten years later, the same trees were re-instrumented to evaluate the changes patterns of bole distribution and growth characteristics following this disturbance. Ten years after thinning all trees had circular patterns of bole distribution similar to those documented before the thinning. A reduction in sway distance at average wind speed of 5.0 m s was also documented, despite trees being on average 2.1 m taller. In addition, crown closure increased and there were overlapping crowns between some trees. The asymmetrical radial increment of the bole at breast height and percentage of latewood both appeared to be related to the elimination of the mapped elliptical patterns of bole positions ten years following thinning.

中文翻译：

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稀疏的黑松树对风的适应

这项研究调查了间伐十年后同龄黑松林中 10 棵树的风动摇摆模式。Rudnicki (2003) 之前曾对这一林分进行过调查，他记录了间伐后不久，一半树木上树干的映射茎频率分布模式的变化。十年后，对相同的树木进行了重新检测，以评估这次干扰后树干分布和生长特征的变化模式。间伐十年后，所有树木都具有与间伐前记录的类似的圆形树干分布模式。尽管树木平均高了 2.1 m，但平均风速为 5.0 m·s 时摇摆距离也减少了。此外，树冠闭合增加，一些树木之间存在重叠树冠。胸高处树干的不对称径向增量和晚材百分比似乎都与间伐十年后树干位置映射的椭圆图案的消除有关。