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IF 2.3 3区 农林科学 Q2 FORESTRY Pub Date : 2024-04-10 DOI: 10.1093/jof/112.1.166
The article contains all poster abstracts from the Wildland Fire track of the 2013 Society of American Foresters National Convention.
这篇文章收录了 2013 年美国林务人员协会全国大会 "荒地火灾 "分会的所有海报摘要。
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引用次数: 0
Availability, Quality, and Selection of Browse by White-Tailed Deer After Clearcutting 开垦后白尾鹿对草食的需求、质量和选择
IF 2.3 3区 农林科学 Q2 FORESTRY Pub Date : 2024-04-10 DOI: 10.1093/jof/89.10.31
Jeffrey W. Hughes, Timothy J. Fahey
We evaluated the effect of large-scale forest harvest on the production, nutritive quality, twig size, and use of four preferred species of browse by white-tailed deer in a spruce-fir forest in New Hampshire. Red maple produced the most new twigs (44-fold increase 3 years after harvest), and 99% of these were sprouts from stumps. Mountain maple and mountain ash twig production increased by factors of 3.5 and 1.9, respectively, and most twigs were borne on stems that survived the clearcutting. Most yellow birch (4-fold increase after 3 years) colonized from newly dispersed seed. For all species of browse except yellow birch, clearcutting resulted in (1) significantly larger, heavier twigs, and (2) significantly higher concentrations of protein and soluble carbohydrates. Deer removed a higher proportion of twigs from the clearcut than from the uncut forest. Mountain ash and mountain maple were the preferred species on both sites. Management implications are discussed.
我们评估了大规模森林采伐对新罕布什尔州云杉-冷杉林中四种白尾鹿喜欢的食草的产量、营养质量、树枝大小和使用情况的影响。红枫产生的新树枝最多(采伐后 3 年增加了 44 倍),其中 99% 都是从树桩上长出来的。山枫树和山白蜡的树枝产量分别增加了 3.5 倍和 1.9 倍,而且大部分树枝都长在砍伐后存活下来的茎上。大多数黄桦(3 年后增加了 4 倍)都是从新散播的种子上长出来的。对于除黄桦以外的所有食草物种,砍伐都会导致:(1)树枝明显更大、更重;(2)蛋白质和可溶性碳水化合物的浓度明显更高。与未砍伐的森林相比,鹿从砍伐过的森林中采食树枝的比例更高。山白蜡和山枫树是这两个地点的首选树种。本文讨论了对管理的影响。
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引用次数: 0
Does the U.S. Face a Shortfall of Timber? 美国是否面临木材短缺?
IF 2.3 3区 农林科学 Q2 FORESTRY Pub Date : 2024-04-10 DOI: 10.1093/jof/76.5.276
Dwight Hair
Recent studies show that the demands for timber from domestic forests are likely to grow rapidly in the decades ahead. Supplies, on the other hand, will increase rather slowly if forests continue to be managed much as they have been. These projections and the widening gap between them have been viewed by some in terms of a physical shortfall. In a free market economy, however, there will not be a shortfall. Prices will rise until there is an equilibrium between demands and supplies. Rising relative prices will limit the expansion potential of the timber industries. They will also mean higher costs to consumers, increased dependence on imports, greater environmental costs associated with expanding use of substitutes, and acceleration in the rate of use of nonrenewable resource.
最近的研究表明,未来几十年,国内森林对木材的需求可能会迅速增长。而另一方面,如果继续像以前那样管理森林,供应量的增长将相当缓慢。一些人认为,这些预测以及两者之间不断扩大的差距表明存在实际短缺。然而,在自由市场经济中,不会出现短缺。价格会上涨,直到供求平衡。相对价格的上涨将限制木材行业的扩张潜力。相对价格上涨还意味着消费者的成本增加,对进口的依赖性增加,与扩大使用替代品有关的环境成本增加,以及不可再生资源的使用速度加快。
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引用次数: 0
Hazards of Root Disease in Pacific Northwest Recreation Sites 西北太平洋地区休闲场所根病的危害
IF 2.3 3区 农林科学 Q2 FORESTRY Pub Date : 2024-04-10 DOI: 10.1093/jof/80.3.163
Gregory M. Filip, Donald J. Goheen
Trees with root diseases. especially not caused by Phellinus weirii, are subject to windthrow, and thus seriously threaten public safety in developed recreation sites in Pacific Northwest forests. Pathologists or specially trained foresters should inspect an area for root disease hazards before construction begins. When trees with diseased roots are found on sites that are already in operation, managers must reduce present and future hazards while maintaining the area's beauty.
患有根部疾病的树木(尤其不是由 Phellinus weirii 引起的)容易被风吹倒,因此严重威胁着西北太平洋森林中已开发休闲场所的公共安全。病理学家或受过专门培训的林业人员应在施工开始前检查该地区是否存在根部病害隐患。如果在已投入使用的场地上发现有病根的树木,管理人员必须在保持该地区美观的同时,减少现在和将来的危害。
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引用次数: 0
Birds in Six Communities within a Lodgepole Pine Forest 洛奇松林中六个群落的鸟类
IF 2.3 3区 农林科学 Q2 FORESTRY Pub Date : 2024-04-10 DOI: 10.1093/jof/77.9.584
Dennis D. Austin, Michael L. Perry
Birds were censused in six communities within a lodgepole pine (Pinus contorta) forest in the Uinta Mountains of Utah: wet and dry meadows, mature and stagnated lodgepole pine stands, and openings made by clearcutting in 1940 and 1960 and presently having regenerating lodgepole pine stands. The richest avifauna was in the dry meadows, a finding that suggests the need to protect these areas from disturbance. Although a few bird species were adversely affected by clearcutting, many were more numerous in the clearcut areas than in unlogged stands, and the number of species remained about the same. Disturbance of the stagnated stands would be highly beneficial to birds.
在犹他州乌因塔山脉的一片落羽松(Pinus contorta)林中的六个群落中对鸟类进行了普查:湿草甸和干草甸、成熟和停滞的落羽松林、1940 年和 1960 年清伐后形成的空地以及目前正在再生的落羽松林。鸟类最丰富的地区是干燥的草地,这一发现表明有必要保护这些地区免受干扰。虽然有少数鸟类受到了砍伐的不利影响,但许多鸟类在砍伐区的数量比在未砍伐区的要多,物种数量也基本保持不变。对停滞的林分进行干扰对鸟类非常有益。
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引用次数: 0
A Stochastic Production Frontier Analysis of Factors That Affect Productivity and Efficiency of Logging Businesses in Virginia 弗吉尼亚州伐木企业生产率和效率影响因素的随机生产前沿分析
IF 2.3 3区 农林科学 Q2 FORESTRY Pub Date : 2024-03-26 DOI: 10.1093/jofore/fvae006
Pedro J Sartori, Stella Z Schons, Scott Barrett
Understanding the effect of the relationship between timber harvesting attributes on loggers’ productivity and efficiency is crucial for the feasibility and expansion of sustainable forest management and logging. We applied a stochastic production frontier model to firm-level operational data collected from 202 loggers in Virginia, United States, in 2019. Logging equipment value, physiographic region, tract area, number of workers and crews in the woods, college education level, and harvest type statistically increase harvesting productivity. Harvesting productivity in the Coastal Plain was the greatest of all physiographic regions, and pine clearcut productivity was statistically greater than that of hardwood thinning. On the other hand, manual felling reduces harvesting productivity. We found an average efficiency rate of 67% among firms in our sample, which is similar to that found in the literature. The estimated values can show factors that improve forest harvest productivity through better planning and investments while improving the sustainable use of inputs and resources. Study Implications: We empirically analyzed factors affecting logging productivity and efficiency in the southern US state of Virginia. Increased productivity was associated with working in the Coastal Plain physiographic region, investing in logging equipment, increasing the number of workers and crews in the woods, increasing pine clearcut as opposed to hardwood thinning, choosing optimal harvesting tract size, and having a college education as opposed to no high school degree. Manual felling reduces harvesting productivity, and average BMP implementation time does not affect harvesting productivity. Our results can be used as a guide in planning future decisions to increase logging productivity.
了解木材采伐属性之间的关系对伐木者生产力和效率的影响对于可持续森林管理和伐木的可行性和扩展至关重要。我们将随机生产前沿模型应用于 2019 年从美国弗吉尼亚州 202 名伐木工人处收集的企业级运营数据。伐木设备价值、地理区域、迹地面积、伐木工人和工作人员数量、大学教育水平和采伐类型在统计上提高了采伐生产率。在所有地理区域中,沿海平原的采伐生产率最高,从统计学角度看,松木净伐的生产率高于硬木疏伐的生产率。另一方面,人工砍伐降低了采伐生产力。我们发现样本中企业的平均效率为 67%,与文献中的结果相似。估计值可以显示出通过更好的规划和投资提高森林采伐生产率的因素,同时改善投入和资源的可持续利用。研究意义:我们对影响美国南部弗吉尼亚州伐木生产率和效率的因素进行了实证分析。生产率的提高与以下因素有关:在沿海平原地貌区工作、投资伐木设备、增加伐木工人和工作人员的数量、增加松木清伐而不是硬木疏伐、选择最佳采伐迹地面积以及受过大学教育而不是没有高中学历。人工砍伐降低了采伐生产率,而BMP的平均实施时间并不影响采伐生产率。我们的研究结果可用于指导未来提高伐木生产率的决策规划。
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引用次数: 0
Evaluation of the Root Rupture Method for Controlling Belowground Spread of the Oak Wilt Pathogen (Bretziella fagacearum) in Northeast Wisconsin, USA 美国威斯康星州东北部控制橡树枯萎病病原体(Bretziella fagacearum)地下蔓延的断根法评估
IF 2.3 3区 农林科学 Q2 FORESTRY Pub Date : 2024-03-25 DOI: 10.1093/jofore/fvad055
Anna Yang, Linda M Haugen, David L Mausel, John Lampereur, Tommy Stueck, Rebecca A Montgomery, Jennifer Juzwik
Oak wilt, caused by the pathogen Bretziella fagacearum, is a destructive disease on oak (Quercus) species in the United States. Established methods to control the belowground spread of oak wilt are not appropriate in all circumstances; thus, forest health managers have a strong need for alternative methods for disease control. We evaluated the effectiveness of operational stump excavation treatments (i.e., “root rupture” method) applied between 2004 and 2014 to control belowground spread of oak wilt on two forests in northeast Wisconsin, USA. The root rupture method achieved a high level of disease control (≥85% of evaluated disease infection centers) for 5 years by harvesting red oak trees within infection centers and uprooting the stumps and associated root mass. The likelihood of disease control success depended on the initial size of the infection center that was treated, with larger infection centers being less likely to be contained with a single treatment than small infection centers. This study highlights the importance of early detection and prompt management in oak wilt suppression programs. Study Implications: Forest management agencies and organizations in the North Central United States continue to face oak wilt epidemics. No single tool or treatment method ensures complete containment of oak wilt; thus, most managers carefully consider all the tools and techniques available to them and determine what best suits their budget and land use priorities. Stump excavation (i.e., “root rupture” method) is a cost-effective treatment for halting belowground spread of the oak wilt fungus, Bretziella fagacearum, that can achieve a high level of disease control. In northern red oak (Quercus rubra) stands with high economic value, this treatment can be applied as a group selection, with the value of the timber potentially offsetting the cost of treatment. The opportunity for complete disease control decreases as oak wilt infection centers increase in size; thus, monitoring and early control actions are critical.
由病原体 Bretziella fagacearum 引起的橡树枯萎病是美国橡树(栎树)物种上的一种毁灭性病害。现有的控制橡树枯萎病地下蔓延的方法并不适用于所有情况;因此,森林健康管理者非常需要替代的病害控制方法。我们评估了 2004 年至 2014 年间在美国威斯康星州东北部的两片森林中采用树桩挖掘处理方法(即 "根部断裂法")控制橡树枯萎病地下蔓延的效果。根部断裂法通过采伐感染中心内的红栎树并连根拔起树桩和相关根块,实现了连续 5 年的高水平病害控制(≥85% 的评估病害感染中心)。病害控制成功的可能性取决于所处理的感染中心的初始大小,与小感染中心相比,大感染中心更不可能通过一次处理就得到控制。这项研究强调了在橡树枯萎病抑制计划中早期发现和及时处理的重要性。研究意义:美国中北部的森林管理机构和组织仍然面临着橡树枯萎病流行的问题。没有任何一种工具或处理方法能确保完全控制橡树枯萎病;因此,大多数管理者都会仔细考虑所有可用的工具和技术,并确定最适合其预算和土地使用优先级的方法。树桩挖掘法(即 "根部断裂法")是阻止橡树枯萎病真菌 Bretziella fagacearum 地下扩散的一种经济有效的处理方法,可以达到很高的病害控制水平。在经济价值较高的北方红栎(Quercus rubra)林木中,这种处理方法可作为集体选择使用,木材的价值有可能抵消处理成本。随着橡树枯萎病感染中心规模的扩大,完全控制病害的机会也会减少;因此,监测和早期控制行动至关重要。
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引用次数: 0
Analysis of Forest Inventory Data Shows Disparity in Tree Mortality and Resistance in Texas National Forests 森林资源清查数据分析显示得克萨斯州国家森林中树木死亡率和抵抗力的差异
IF 2.3 3区 农林科学 Q2 FORESTRY Pub Date : 2024-02-17 DOI: 10.1093/jofore/fvad059
Nicholas P Dewez, Weimin Xi, Duston R Duffie, Mukti R Subedi, Tilak Chaudhary, Sandra Rideout-Hanzak, Ambrose O Anoruo, Thomas Estabrook
In 2011, the forestlands of Texas were affected by one of the most severe droughts in the state’s history, killing an estimated 65 million trees in the East Texas region. This study uses USDA Forest Service Forest Inventory and Analysis data and a standardized precipitation-evapotranspiration index to estimate major tree species responses to the 2011 drought in Texas’ four national forests. We used an analysis of variance and a linear mixed-effect model to evaluate factors contributing to tree mortality and growth. We found that tree mortality rates varied greatly during the drought period relative to predrought levels; higher stand age, higher stand density, and higher mean summer temperature contributed to tree mortality volume. Study Implications: Drought is a recurring disturbance agent and is likely to continue to increase in frequency and severity in the future. We provide an understanding of an exceptional drought as a disturbance agent and its impacts on tree mortality and resistance. The effects of the 2011 drought on national forests in Texas have not previously been evaluated. Texas’ national forests represent over 256,975 ha (635,000 ac) in the state’s eastern region and nearly 10% of all public land in Texas. Our results are useful to decision makers in developing strategies and protecting forestlands in the face of potential future droughts.
2011 年,得克萨斯州的林地遭受了该州历史上最严重的旱灾之一,估计东得克萨斯地区有 6500 万棵树木死亡。本研究利用美国农业部林务局的森林资源调查与分析数据以及标准化降水-蒸散指数来估计德克萨斯州四个国家森林中主要树种对 2011 年干旱的反应。我们使用方差分析和线性混合效应模型来评估导致树木死亡和生长的因素。我们发现,相对于干旱前的水平,干旱期间的树木死亡率差异很大;较高的林分年龄、较高的林分密度和较高的夏季平均气温导致了树木的死亡量。研究意义:干旱是一种经常性的干扰因素,其频率和严重程度在未来可能会继续增加。我们对作为干扰因素的特大干旱及其对树木死亡率和抵抗力的影响进行了了解。2011 年的干旱对德克萨斯州国家森林的影响以前从未进行过评估。得克萨斯州的国家森林位于该州东部地区,面积超过 256,975 公顷(635,000 英亩),占得克萨斯州所有公共土地的近 10%。我们的研究结果有助于决策者在未来可能发生的干旱面前制定战略和保护林地。
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引用次数: 0
Herbicides Have Variable Effects on Understory Plant and Insect Communities in Southern United States Working Forests 除草剂对美国南部工作林林下植物和昆虫群落的影响各不相同
IF 2.3 3区 农林科学 Q2 FORESTRY Pub Date : 2024-02-10 DOI: 10.1093/jofore/fvad060
Emma L Briggs, Daniel U Greene, David C Clabo, Kamal J K Gandhi
Working pine (Pinus spp.) forests in the southern United States rely on herbicides to remove competing vegetation and improve productivity. We conducted a review of the effects of herbicides on understory plants in southern working forests. We also discuss the impacts of herbicides on insect taxa associated with understory vegetation and its litter layer, including Coleoptera (carabid beetles), Hemiptera (true bugs), Hymenoptera (bees/ants), Lepidoptera (moths/butterflies), and Orthoptera (grasshoppers). Herbicides have few reported long-term impacts on understory herbaceous cover and species richness/diversity when applied according to labeled uses and application rates. However, the method of chemical treatment (e.g., broadcast spray or banded application) may influence understory plant structure and composition. Responses of insects to herbicides were species- and taxa-specific and highly variable given their forage/habitat requirements and life histories. Long-term research is needed to evaluate the effects of herbicides on vegetation-associated insects to provide a comprehensive profile of herbicide nontarget impacts. Study Implications: Land managers rely on herbicides to remove competing vegetation and increase working forest productivity. Given the objective of sustainable forest management to conserve biodiversity, it is important to understand how biological communities respond to chemical applications in intensively managed forest ecosystems. Our review indicated that herbicides have few reported long-term impacts on understory plant communities when applied appropriately. Despite their taxonomic diversity, invertebrates were rarely included in assessments of forest herbicides. Further research is needed to assess the potential nontarget impacts of herbicide applications on forest insect communities.
美国南部的工作松林(Pinus spp.)我们研究了除草剂对南部工作林林下植物的影响。我们还讨论了除草剂对与林下植被及其枯落物层相关的昆虫类群的影响,包括鞘翅目(甲壳虫)、半翅目(真蝽)、膜翅目(蜜蜂/蚂蚁)、鳞翅目(蛾/蝶)和直翅目(蚱蜢)。据报道,除草剂在按照标注用途和施用量施用时,对林下草本植物覆盖率和物种丰富性/多样性的长期影响很小。不过,化学处理方法(如喷洒或带状施用)可能会影响林下植物的结构和组成。昆虫对除草剂的反应因物种和分类群而异,而且因其对觅食/栖息地的要求和生活史而变化很大。需要进行长期研究,评估除草剂对植被相关昆虫的影响,以全面了解除草剂的非目标影响。研究意义:土地管理者依靠除草剂清除竞争性植被,提高工作林的生产力。鉴于可持续森林管理的目标是保护生物多样性,因此了解生物群落如何对密集管理的森林生态系统中的化学应用做出反应非常重要。我们的研究表明,如果使用得当,除草剂对林下植物群落的长期影响很少有报道。尽管无脊椎动物在分类学上具有多样性,但它们很少被纳入森林除草剂的评估范围。需要开展进一步的研究,以评估除草剂的应用对森林昆虫群落的潜在非目标影响。
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引用次数: 0
US Forest Service Experimental Forests and Ranges: An Untapped Resource for Social Science 美国林务局实验林和牧场:尚未开发的社会科学资源
IF 2.3 3区 农林科学 Q2 FORESTRY Pub Date : 2024-01-30 DOI: 10.1093/jof/109.6.313
Susan Charnley, Lee K. Cerveny
For a century, US Forest Service experimental forests and ranges (EFRs) have been a resource for scientists conducting long-term research relating to forestry and range management. Social science research has been limited, despite the history of occupation and current use of these sites for activities ranging from resource extraction and recreation to public education. This article encourages researchers to take advantage of the rich, though largely untapped, potential EFRs offer for social science by describing their many human dimensions and providing an overview of potential research topics. These topics include human uses, economics, historical studies, population and land-use change, human values, and interdisciplinary social-ecological studies. Lack of awareness among social scientists, limited budgets and networking, and the predominance of biophysical scientists who administer and conduct research at EFRs appear to be inhibiting the development of social science research there. We suggest ways of overcoming these barriers.
一个世纪以来,美国林务局的试验林和试验场(EFRs)一直是科学家进行林业和牧场管理相关长期研究的资源。社会科学研究一直很有限,尽管这些地点在历史上曾被占用,目前也被用于从资源开采、娱乐到公共教育等各种活动。本文鼓励研究人员利用环境退化林区为社会科学提供的丰富潜力,尽管这些潜力在很大程度上尚未开发,但本文介绍了环境退化林区的许多人文因素,并概述了潜在的研究课题。这些主题包括人类使用、经济学、历史研究、人口和土地使用变化、人类价值观以及跨学科社会生态研究。社会科学家缺乏认识、有限的预算和网络,以及管理和开展 EFRs 研究的生物物理科学家占主导地位,这些因素似乎阻碍了社会科学研究的发展。我们提出了克服这些障碍的方法。
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引用次数: 0
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Journal of Forestry
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