Microelevational Differences Affect Longleaf Pine (Pinus palustris Mill.) Sensitivity to Tropical Cyclone Precipitation: A Case Study Using Lidar
Microelevational Differences Affect Longleaf Pine (Pinus palustris Mill.) Sensitivity to Tropical Cyclone Precipitation: A Case Study Using Lidar
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DOI：
10.3959/trr2019-9
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发表时间：
2020-06
影响因子：
1.6
通讯作者：
Evan Montpellier;P. Knapp;P. T. Soulé;Justin T. Maxwell
中科院分区：
文献类型：
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作者：
Evan Montpellier;P. Knapp;P. T. Soulé;Justin T. Maxwell
长叶松晚材年轮宽度的研究生长在北卡罗来纳州沿海平原的卡罗莱纳海湾沙堤上的沙堤是热带气旋降水（TCP）的有效记录器。长叶松被假设为TCP的有效记录，因为它们广泛的侧根结构，暴露于增强土壤水分时，TCP事件提高地下水位根水平，但这一假设尚未得到实证检验。在这项研究中，我们使用的组合北卡罗来纳州第1阶段激光雷达和高精度的地理参考数据，调查径向树生长，TCP和微海拔之间的关系。我们的研究结果表明，晚材年轮宽度和TCP之间的相关性的强度呈正相关（p < 0.05）与树木海拔在卡罗莱纳湾砂边缘，导致在更高的海拔树木的敏感性。这些研究结果表明，在某些环境中，微海拔差异（<1米）可能会显着影响气候/径向生长的关系，高分辨率激光雷达技术的使用可能是一个有效的工具，更好地了解微地形对径向生长模式的作用。
ABSTRACT Latewood ring widths of longleaf pine (Pinus palustris Mill.) growing on Carolina bay sand rims on the coastal plains of North Carolina are effective recorders of tropical cycone precipitation (TCP). Longleaf pine are hypothesized to be effective recorders of TCP because of their extensive lateral root structure that is exposed to enhanced soil moisture when TCP events raise the water table to root level, but this hypothesis has not been empirically tested. In this study, we used a combination of North Carolina Phase 1 LiDAR and high-precision georeferenced data to investigate the relationship between radial tree growth, TCP, and microelevation. Our findings suggest that the strength of correlations between latewood ring widths and TCP are positively correlated (p < 0.05) with tree elevation on Carolina bay sand rims, resulting in greater sensistivity of trees at higher elevations. These findings suggest that in some environments, microelevational differences (<1 m) may significantly affect climate/radial growth relationships and the use of high-resolution LiDAR technology may be an effective tool for better understanding the role of microtopography on radial growth patterns.