阿拉巴马瀑布线丘陵自然林冠干扰模式与生态造林

IF 1.5 4区 农林科学 Q2 FORESTRY
Aurora C Baker, David L Phillips, J Davis Goode, Justin L Hart
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引用次数: 0

摘要

随着基于自然干扰的造林方法越来越受到森林管理者的欢迎,自然干扰模式的定量参考条件至关重要。我们使用激光雷达数据来量化美国阿拉巴马州瀑布线山塔拉迪加国家森林奥克穆尔吉护林员地区的EF3级龙卷风的最终结构模式。灾变扰动区面积为123 ha,平均宽度为360 m,残树分布随机。这个区域被一个中等严重干扰的边缘区域缓冲,在那里树木被单独或成组地移除。边缘区平均宽度为220米。研究区共包括79个林分,林分面积受损百分比从<1%到94%。我们认为,在Fall Line Hills地区,阔叶林、种子树和防护林的保留区更新方法可能适合于自然冠层扰动的类比。这些灾难性的干扰入口应该通过一个系统来缓冲未受干扰的社区,该系统保留了成熟的森林结构,并将构成一个中等严重程度的干扰区。我们的方法可以作为一个模板来扩展我们对其他地区和森林类型的自然冠层扰动模式的理解。研究意义:在龙卷风是扰动系统的自然组成部分的地区,包括美国东南部的大部分地区,我们建议可以使用具有保留区再生方法的砍伐、种子树或防护林来近似与龙卷风路径对应的灾难性扰动区域。我们发现,保护区树木的空间格局是随机的,而残馀树可以根据需要的物种或保护重要的生物物理特征(如渗漏)来选择。在灾难性扰动带的周围是一个中等严重扰动的边缘地带,在那里树木被单独地和不同大小的群体移除。我们建议在这个边缘区域记录的结构模式可以通过可变保留收获来创建。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Natural Canopy Disturbance Patterns and Ecological Silviculture in the Alabama Fall Line Hills
Abstract As a natural disturbance-based approach to silviculture is increasingly embraced by forest managers, quantitative reference conditions of natural disturbance patterns are paramount. We used LiDAR data to quantify resultant structural patterns from an EF3 tornado on the Oakmulgee Ranger District of Talladega National Forest in the Alabama Fall Line Hills, USA. We found the zone of catastrophic disturbance totaled 123 ha, had a mean width of 360 m, and residual trees were randomly distributed. This zone was buffered by an edge zone of intermediate-severity disturbance where trees were removed individually and in groups. The edge zone averaged 220 m in width. In total, the study area included seventy-nine stands and the percentage of stand area damaged ranged from &lt; 1% to 94%. We suggest that clearcut, seed tree, and shelterwood with reserves regeneration methods may be appropriate analogs to natural canopy disturbance in the Fall Line Hills region. These catastrophic disturbance entries should be buffered from undisturbed neighborhoods by a system that retains mature forest structures and would constitute a zone of intermediate-severity disturbance. Our approach may be used as a template to expand our understanding of natural canopy disturbance patterns in other regions and forest types. Study Implications: In regions where tornadoes are a natural component of the disturbance regime, including much of the southeastern United States, we suggest that clearcut, seed tree, or shelterwood with reserves regeneration methods may be used to approximate the zone of catastrophic disturbance that corresponds to the tornado track. We observed that reserve tree spatial patterns were random, but residual trees could be selected based on desired species or protection of important biophysical features such as seeps. Surrounding the catastrophic disturbance zone was an edge zone of intermediate-severity disturbance where trees were removed individually and in variably sized groups. We suggest that the structural patterns documented in this edge zone may be created through variable retention harvesting.
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来源期刊
Forest Science
Forest Science 农林科学-林学
CiteScore
2.80
自引率
7.10%
发文量
45
审稿时长
3 months
期刊介绍: Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management. Forest Science is published bimonthly in February, April, June, August, October, and December.
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