Analysis of Forest Inventory Data Shows Disparity in Tree Mortality and Resistance in Texas National Forests

IF 1.8 3区 农林科学 Q2 FORESTRY Journal of 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
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Abstract

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.
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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
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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来源期刊
Journal of Forestry
Journal of Forestry 农林科学-林学
CiteScore
4.90
自引率
8.70%
发文量
45
审稿时长
>24 weeks
期刊介绍: The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry. The Journal is published bimonthly: January, March, May, July, September, and November.
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