SGER: Effects of Hurricane Andrew on Subtropical Hardwood Hammocks of Everglades National Park, Florida

SGER：安德鲁飓风对佛罗里达州大沼泽国家公园亚热带硬木吊床的影响

• 批准号: 9314265
• 负责人: William Platt
• 金额: $ 1.53万
• 依托单位: Louisiana State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-01 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9314265&HistoricalAwards=false
• 关键词: SGER; Effects; Hurricane; Andrew; Subtropical

Hurricanes disrupt forest canopies, resulting in increased light levels both in gaps and beneath overstory trees. Because such increases are likely to be transient in forests in which advance recruits and resprouting trees grow rapidly, study of the responses of vegetation to hurricanes must occur within a short period of time following impact. On August 24, 1992, the south eyewall of Hurricane Andrew impacted patches of subtropical hardwood forests (hammocks) imbedded in slash pine savannas on Long Pine Key in Everglades National Park, Florida. Mapped plots in which all tress 2 cm dbh had been tagged and measured had been established at the time of the hurricane in both burned and unburned hammocks. First, the project will measure damage and mortality of trees in burned and unburned subtropical hammocks and examine patterns of recovery of trees in burned and unburned subtropical hammocks and examine patterns of recovery of trees over the year following the hurricane. Second, it will assess effects of the hurricane on epiphytes by censusing plants in plots located in both burned and unburned hammocks. These data will be used to explore whether the trees and epiphytes respond similarly (and in what ways) to the large-scale disturbances of fires and hurricanes. %%% Ecological systems must constantly respond to stresses on several temporal & spatial scales. This study provides quantitative assessment if the damage & patterns of recovery of populations of tropical trees in subtropical hammocks. Results of this study will be directly comparable to others in the impacts of severe hurricanes on subtropical forests. In addition, by comparing the impact of Hurricane Andrew on trees in burned & unburned hammocks, this study provides a rare opportunity to compare the effects of two major disturbances.

飓风破坏了森林的树冠， 林隙和上层树下的光照水平。 因为 这种增加在森林中可能是短暂的， 先进的新兵和重新发芽的树木生长迅速，研究 植被对飓风的反应必须在短时间内发生， 影响后的一段时间。 1992年8月24日，南 飓风安德鲁的眼墙影响了亚热带地区 硬木林（吊床）嵌入湿地松稀树草原上长 大沼泽地国家公园的松树礁，佛罗里达。 映射图 所有2cm胸径的树木都被标记和测量， 在飓风发生时， 未烧毁的吊床 首先，该项目将衡量损害， 在燃烧和未燃烧的亚热带吊床中的树木死亡率， 检查烧毁和未烧毁的树木的恢复模式 亚热带吊床和研究模式的恢复树木超过 飓风过后的一年。 第二，评估影响 飓风对附生植物的影响， 在燃烧和未燃烧的吊床上。 这些数据将用于 探索树木和附生植物是否有类似的反应（以及 什么方式）的火灾和飓风的大规模干扰。 %%% 生态系统必须不断地对几个方面的压力作出反应。 时空尺度 这项研究提供了定量 评估受损害人口的恢复模式， 在亚热带吊床上的热带树木。 本研究结果将 直接与其他国家相比， 飓风对亚热带森林的影响 此外，通过比较 安德鲁飓风对树木的影响， 这项研究提供了一个难得的机会， 两大干扰。