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Disturbance after Disturbance: Combined Effects of Two Successive Hurricanes on Forest Community Structure
Annals of the American Association of Geographers ( IF 3.2 ) Pub Date : 2019-10-11 , DOI: 10.1080/24694452.2019.1654844
Daehyun Kim 1 , Andrew C. Millington 2 , Charles W. Lafon 3
Affiliation  

Our attempts to gain knowledge from studying the effects of a single windstorm might be complicated by one or more other events that pass through the same system before it recovers from prior damage. In this article, we had the opportunity to examine permanent plots affected by two consecutive catastrophic storms of comparable intensity within a short time frame (less than a decade). We compared tree damage patterns resulting from Hurricane Rita in 2005 and Hurricane Ike in 2008, which struck the same five forest plots (40 m × 50 m each; 1 ha total) established in the Big Thicket National Preserve of southeast Texas. The results showed that the post-Rita forest structure was characterized by intense damage to short, shade-tolerant stems and increased canopy openness. Hence, trees damaged by Ike were, in general, taller, more shade intolerant, and more spatially distant from their undamaged counterparts than trees damaged by Rita. These contrasting damage patterns indicate that Ike affected the plots differently to a normal windstorm occurring in isolation (after a long absence of prior windstorms). We anticipate that the cumulative, compounded effects of these two storms will potentially have long-lasting footprints on the structure and function of the study forest. The need to account for compounding disturbance interactions in forest research and management will grow, because many atmospheric scientists predict increases in both the intensity and frequency of hurricanes in conjunction with future climate change scenarios. Key Words: Big Thicket, disturbance interaction, forest structure, hurricane, spatial point pattern analysis.



中文翻译:

干扰后的干扰:两种连续飓风对森林群落结构的综合影响

我们试图通过研究单个暴风雪的影响来获取知识的尝试可能会因一个或多个其他事件在从先前的破坏中恢复之前经过同一系统而变得复杂。在本文中,我们有机会研究了在短时间内(少于十年)内两次连续两次强度相当的灾难性风暴影响的永久性地块。我们比较了2005年的丽塔飓风和2008年的艾克飓风造成的树木破坏模式,它们袭击了德克萨斯州东南部大灌木丛国家级自然保护区中建立的五个相同的森林地块(每个40 m×50 m;共计1公顷)。结果表明,Rita后森林结构的特点是对短而耐荫的茎部造成严重破坏,并增加了树冠开放度。因此,受艾克(Eke)破坏的树木通常更高,更不耐阴影,并且比受到丽塔(Rita)破坏的树木在空间上更远离未受损的树木。这些相反的破坏模式表明,艾克对地块的影响与孤立发生的正常暴风雨不同(此前长期没有暴风雨之后)。我们预计这两种风暴的累积,复合影响将对研究林的结构和功能产生长期的足迹。由于许多大气科学家预测飓风的强度和频率会随着未来的气候变化情景而增加,因此在森林研究和管理中考虑到加剧的干扰相互作用的需求将越来越大。这些相反的破坏模式表明,艾克对地块的影响与孤立发生的正常暴风雨不同(此前长期没有暴风雨之后)。我们预计这两种风暴的累积,复合影响将对研究林的结构和功能产生长期的足迹。由于许多大气科学家预测飓风的强度和频率会随着未来的气候变化情景而增加,因此在森林研究和管理中考虑到加剧的干扰相互作用的需求将越来越大。这些相反的破坏模式表明,艾克对地块的影响与孤立发生的正常暴风雨不同(此前长期没有暴风雨之后)。我们预计这两种风暴的累积,复合影响将对研究林的结构和功能产生长期的足迹。由于许多大气科学家预测飓风的强度和频率会随着未来的气候变化情景而增加,因此在森林研究和管理中考虑到加剧的干扰相互作用的需求将越来越大。这两种风暴的复合影响可能会对研究林的结构和功能产生持久的影响。由于许多大气科学家预测飓风的强度和频率会随着未来的气候变化情景而增加,因此在森林研究和管理中考虑到加剧的干扰相互作用的需求将越来越大。这两种风暴的复合影响可能会对研究林的结构和功能产生持久的影响。由于许多大气科学家预测飓风的强度和频率会随着未来的气候变化情景而增加,因此在森林研究和管理中考虑到加剧的干扰相互作用的需求将越来越大。关键词:大灌木丛,干扰相互作用,森林结构,飓风,空间点模式分析

更新日期:2020-04-20
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