A dendroecological method to examine summertime soil-moisture changes: a case study from North Carolina, USA

IF 2.1 3区农林科学 Q2 FORESTRY Trees Pub Date : 2022-10-14 DOI:10.1007/s00468-022-02353-6

Avery A. Catherwood, Tyler J. Mitchell, Paul A. Knapp

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引用次数: 1

Key message

Use of co-occurring species with varying temporal sensitivities to summer soil moisture may be used as a diagnostic to determine summertime drought intensification or amelioration.

Abstract

The use of tree-ring data from co-occurring species with different summertime soil-moisture responses provides an opportunity to evaluate the occurrence and direction of soil-moisture changes. Here, we present a method that compares adjusted latewood growth between longleaf pine (Pinus palustris Mill.) and chestnut oak (Quercus prinus L.) from 1969 to 2018 in the Uwharrie Mountains of central North Carolina, USA. We found that adjusted latewood sensitivity to soil moisture varied between species with the strongest response in September PDSI for longleaf pine (r = 0.47), and July PDSI for chestnut oak (r = 0.61). Large (> 0.20 or < − 0.20) radial growth differences between species occurred during 22 years of the 50-year study period and were strongly correlated with PDSI differences (r = 0.74, p < 0.001), while the correlation with the whole dataset (r = 0.34, p < 0.05) was less sensitive. Major growth difference years were predominately negative (n = 17), suggesting that this method is more effective at detecting summers with decreasing soil moisture between mid and late summer. Overall, these results indicate that a differential response between species with dissimilar latewood formation periods may provide a means to examine potential intermonthly changes in summertime soil-moisture conditions as opposed to a single proxy value (e.g., anomalously dry, or wet) characterizing the entire summer.

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研究夏季土壤湿度变化的树木生态学方法:以美国北卡罗来纳州为例

利用对夏季土壤湿度具有不同时间敏感性的共生物种可作为确定夏季干旱加剧或改善的诊断方法。摘要利用具有不同夏季土壤水分响应的共发生树种的树木年轮数据，为评价土壤水分变化的发生和方向提供了一个机会。在这里，我们提出了一种方法，比较1969年至2018年美国北卡罗来纳州中部Uwharrie山脉长叶松(Pinus palustris Mill.)和栗木(Quercus prinus L.)之间调整后的木材生长。校正后的晚木对土壤水分的敏感性在不同树种间存在差异，其中长叶松在9月的PDSI响应最强(r = 0.47)，板栗栎在7月的PDSI响应最强(r = 0.61)。在50年研究期间的22年中，物种间径向生长差异较大(> 0.20或<−0.20)，与PDSI差异呈强相关(r = 0.74, p < 0.001)，而与整个数据集的相关性(r = 0.34, p < 0.05)不太敏感。主要生长差异年均为负(n = 17)，表明该方法对夏中末土壤湿度下降的夏季更为有效。总的来说，这些结果表明，不同晚林形成时期的物种之间的差异响应可能提供了一种方法来检查夏季土壤湿度条件的潜在月际变化，而不是单个代理值(例如异常干燥或潮湿)表征整个夏季。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Trees 农林科学-林学

CiteScore

4.50

自引率

4.30%

发文量

113

审稿时长

3.8 months

期刊介绍： Trees - Structure and Function publishes original articles on the physiology, biochemistry, functional anatomy, structure and ecology of trees and other woody plants. Also presented are articles concerned with pathology and technological problems, when they contribute to the basic understanding of structure and function of trees. In addition to original articles and short communications, the journal publishes reviews on selected topics concerning the structure and function of trees.