Vegetation response to large scale disturbance in a southern Appalachian forest: Hurricane Opal and salvage logging
Vegetation response to large scale disturbance in a southern Appalachian forest: Hurricane Opal and salvage logging
复制标题
阿巴拉契亚南部森林植被对大规模干扰的响应：飓风蛋白石和抢救性伐木
DOI：
10.2307/3088682
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发表时间：
2002
影响因子：
0.3
通讯作者：
Lisa M. Krueger
中科院分区：
文献类型：
--
作者：
K. Elliott;S. L. Hitchcock;Lisa M. Krueger
例如灾难性的风力对阿巴拉契亚山脉南部森林的结构和组成起着重要作用。我们在北卡罗来纳州西部的考维塔水文实验室报告了飓风“蛋白石”以及抢救性伐木对干扰后头三年植被动态（再生、组成和多样性）的影响。本研究的目的是比较飓风 + 抢救性砍伐 (H+S) 森林与邻近未受干扰森林中林下和地层物种的物种组成和多样性。 H+S 森林中的地层物种丰度远高于未受干扰的森林，并且丰度随着时间的推移而增加。 H+S 森林的覆盖率、密度和物种丰富度显着高于未受干扰的森林。此外，1997 年至 1999 年间，H+S 图中的覆盖率增加了约 85%。到干扰后的第三年，基于覆盖百分比的香农多样性指数（H'）在 H+S 森林中显着高于未受干扰的森林。然而，任何一年，H+S 森林和未受干扰森林之间的 H' 密度没有显着差异。在未受干扰的森林中，有30科59种50属。到1999年（干扰后第三年），H+S森林保留了42科72属93种。两个采样森林中菊科和百合科的物种数量最多，H+S 图中百合科的物种较多。被风吹倒的树木被连根拔起而形成的坑和土丘地形、抢救性伐木现场留下的砍伐碎片的阴影以及剩余的上层树木的阴影形成了马赛克式的环境条件。这种环境异质性可能是早期（不耐荫）和晚期（耐荫）演替草本物种混合的原因，以及比未受干扰的森林更高的物种丰富度和多样性。
such as catastrophic windthrow can play a major role in the structure and composition of southern Appalachian forests. We report effects of Hurricane Opal followed by salvage logging on vegetation dynamics (regeneration, composition, and diversity) the first three years after disturbance at the Coweeta Hydrologic Laboratory in western North Carolina. The objective of this study was to compare species composition and diversity of understory and groundlayer species in a hurricane + salvage logged (H+S) forest to an adjacent undisturbed forest. Abundance of groundlayer species was much higher in the H+S forest than in the undisturbed forest, and abundance increased over time. Percent cover, density, and species richness were significantly higher in the H+S forest than in the undisturbed forest. In addition, percent cover increased by approximately 85% between 1997 and 1999 in the H+S plots. Shannon's index of diversity (H') based on percent cover was significantly higher in the H+S forest than the undisturbed forest by the third year after disturbance. However, there was no significant difference in H' based on density between H+S forest and the undisturbed forest in either year. In the undisturbed forest, 59 species and 50 genera represented 30 families. By 1999 (the third year after disturbance), the H+S forest retained 93 species, 72 genera and 42 families. The Asteraceae and Liliaceae had the highest number of species in both sampled forests, with more species of Liliaceae in the H+S plots. Micro-relief created from pit and mound topography from uprooting of windthrown trees, shade from the slash-debris left on site from the salvage logging, and shade from the remaining overstory trees created a mosaic of environmental conditions. This environmental heterogeneity could be responsible for the mix of early (shade intolerant) and late (shade tolerant) successional herbaceous species, and a higher species richness and diversity than the undisturbed forest.