Typhoon Disturbance and Stand‐level Damage Patterns at a Subtropical Forest in Taiwan 1
Typhoon Disturbance and Stand‐level Damage Patterns at a Subtropical Forest in Taiwan 1
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DOI：
10.1111/j.1744-7429.1998.tb00058.x
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发表时间：
1998-06
期刊：
影响因子：
2.1
通讯作者：
C. Mabry;S. Hamburg;T. Lin;F. Horng;H. King;Y. Hsia
中科院分区：
文献类型：
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作者：
C. Mabry;S. Hamburg;T. Lin;F. Horng;H. King;Y. Hsia
我们研究了台湾东北部福山实验林的台风扰动状况。每年平均经过台北200公里范围内（距现场40公里）的台风次数为1.4次。强度足以将大量树木连根拔起的 4 级和 5 级台风分别每 8.3 年和 12.5 年发生一次，尽管某些 4 级和 5 级台风很可能没有在富山造成大范围的排污，因为最大风力区域错过了研究地点。连根拔起比折断树干更常见。然而，对树木最常见的损害可能是落叶，尽管目前的研究并未对这种损害进行量化。百分之三十五的被风损坏的树木与间隙有关。百分之六的土地面积存在缺口。当所有≤9年的间隙都包含在计算中时，冠层周转时间按175年计算，但当较旧的间隙被排除在计算之外时，时间会减少。周转时间略高于其他热带森林的计算值。由于周转时间随着间隙中的土地百分比的减少而增加，因此福山间隙的寿命较短可能导致我们计算出的时间较长。受损的概率与树种特性无关，并且只有少数树种被发现在间隙中再生。主成分分析表明，受损树木的倒伏方向和坡向差异较大；间隙主要在方面和间隙大小方面有所不同。
We examined the typhoon wind disturbance regime of the Fu‐Shan Experimental Forest in northeastern Taiwan. Mean number of typhoons passing within 200 kilometers of Taipei (40 kilometers from the site) was 1.4 per year. Category 4 and 5 typhoons, which are intense enough to uproot large numbers of trees, occurred every 8.3 and 12.5 years respectively, although it is likely that some category 4 and 5 typhoons did not produce extensive blowdowns at Fu‐Shan because the area of maximum winds missed the study site. Uprooting was more common than snapped boles; the most common damage to trees, however, was probably defoliation, although this damage was not quantified in the current study. Thirty‐five percent of wind‐damaged trees were associated with a gap. Six percent of the land area was in gaps. Canopy turnover time was calculated at 175 years when all gaps ≤ 9 years old were included in the calculation, but the time decreased when older gaps were excluded from the calculation. Turnover time was somewhat higher than calculated for other tropical forests. Because turnover time increases as the percent of land in gaps decreases, the short life span of gaps at Fu‐Shan probably contributed to our higher calculated time. Probability of being damaged was not related to tree species identity, and only a few species of trees were found regenerating in gaps. Principal Components Analysis indicated that damaged trees varied largely in treefall orientation and aspect; gaps varied primarily in aspect and in gap size.