Effects of crown loss as a result of the 1998 ice storm on foliar metabolites in sugar maple and American beech growing in Vermont and New Hampshire; how/when trees respond to the effects of injury

These data contain biochemical parameters as measured in foliage of two hardwood tree species in the northeastern U.S. in response to damage caused by a regional ice storm. In January of 1998, a major storm event left over 17 million acres of forests in the northeastern U.S. and eastern Canada covered in variable thicknesses of ice. By October 1998 ice damaged study plots were established and comparative crown damage assessments were completed. In mid-July to mid-August 1999, 2000, and 2001 foliage was collected from 3 crown damage classes, representing different percentages of crown loss, of sugar maple growing at Butterfield Mountain, VT, and from American beech trees in the Bartlett Experimental Forest, NH. A follow-up collection was made from the remaining beech trees at Bartlett in 2015. Data used to evaluate how/when trees respond to the effects of injury and/or recovery includes free polyamines, free amino acids, soluble ions, chlorophyll and soluble proteins that were analyzed using an HPLC, ICP, and spectrophotometer.This was a study to examine how foliar metabolites respond over time to different degrees of damage from major storm events. As it is predicted that the number and severity of storms will increase, resulting tree response data could be used in modeling efforts to predict potential impacts on the structure and function of northern hardwood forests.本数据集收录了美国东北部两种阔叶树种叶片的生化参数测定结果，用于探究其对区域性冰风暴所造成损伤的响应。1998年1月，一场大型风暴事件致使美国东北部及加拿大东部超过1700万英亩的森林被厚度不均的冰层覆盖。1998年10月，研究人员设立冰损研究样地并完成树冠损伤对比评估。1999年7月中旬至8月中旬、2000年及2001年，研究人员分别从佛蒙特州巴特菲尔德山的糖枫（按树冠损伤程度划分为3个等级，对应不同树冠损失比例），以及新罕布什尔州巴特利特实验林的美洲山毛榉采集叶片样本。2015年，研究人员对巴特利特实验林的剩余山毛榉样本进行了追加采集。用于评估树木如何、何时响应损伤效应及恢复过程的生化指标包括游离多胺、游离氨基酸、可溶性离子、叶绿素与可溶性蛋白，相关分析分别通过高效液相色谱法（High Performance Liquid Chromatography, HPLC）、电感耦合等离子体（Inductively Coupled Plasma, ICP）及分光光度计（Spectrophotometer）完成。本研究旨在探究阔叶树叶片代谢物随时间推移对重大风暴事件造成的不同程度损伤的响应规律。鉴于目前预测风暴的发生频次与强度均会上升，相关树木响应数据可用于建模研究，以预测北部硬木森林的结构与功能可能受到的潜在影响。