We examined the effects of artificial gap creation on the diversification of simplified stand structures in an abandoned coppice. A study plot was placed in a 49-year-old evergreen coppice, and two canopy gaps of ca. 100 m² were artificially created by logging in December 1992. In 2015–2016 (22–23 years after gap creation), stand structure was resurveyed and compared between a gap-treated plot (PT) and control plot (PC). PT was separated into gap (G), gap edge (GE), and forest interior (FI) parts, and their structures were compared. G and GE, where recruitment of new stems/individuals was expected, had no increase in small stems in 2015 and 2016, showing a mono-modal height distribution pattern in PT similar to PC. Species number also showed no difference between PT and PC, demonstrating a large proportion of species common to PT and PC. No species specific to G and GE was found. In PT, resprouted stems recovered their individual heights during the study period, resulting in a re-simplified local structure and canopy closure. From these results, we concluded that artificial gap creation in the studied stand was insufficient to diversify the stand structure at a mid-term (20 years) scale, and that repeated cutting and/or control of the resprouted stem density is required for diversification of abandoned coppices.

我们检查了人工间隙创建对废弃灌木丛中简化林分结构多样化的影响。一个研究地块被放置在一个 49 岁的常绿灌木丛中，两个树冠间隙约。100 米²于 1992 年 12 月通过伐木人工创建。在 2015-2016 年（间隙创建后 22-23 年），重新调查了林分结构，并在间隙处理区 (PT) 和控制区 (PC) 之间进行了比较。将PT分为间隙（G）、间隙边缘（GE）和森林内部（FI）部分，并比较它们的结构。预计招募新茎/个体的 G 和 GE 在 2015 年和 2016 年小茎没有增加，在 PT 中显示出类似于 PC 的单峰高度分布模式。物种数量也显示 PT 和 PC 之间没有差异，表明大部分物种为 PT 和 PC 共有。没有发现 G 和 GE 特有的物种。在 PT 中，重新发芽的茎在研究期间恢复了它们的个体高度，从而重新简化了局部结构和树冠关闭。从这些结果来看，