Data and code from: Big trees burning: Divergent wildfire effects on large trees in open- vs. closed-canopy forests

Wildfire activity has accelerated with climate change, sparking concerns about uncharacteristic impacts on mature and old-growth forests containing large trees. Recent assessments have documented fire-induced losses of large-tree habitats in the US Pacific Northwest, but key uncertainties remain regarding contemporary vs. historical fire effects in different forest composition types, specific impacts on large trees within closed versus open canopies, and the role of fuel reduction treatments. Focusing on the 2021 Schneider Springs Fire, which encompassed 43,000 ha in the eastern Cascade Range of Washington, this study addresses three interrelated questions: (1) Are burn severity distributions consistent with historical fire regimes in dry, moist, and cold forest types? (2) How does burn severity vary among forest structure classes, particularly large trees with open vs. closed canopies? (3) What is the influence of fuel reduction treatments on burn severity inside and outside of treated..., , , # Big trees burning: Divergent wildfire effects on large trees in open- vs. closed-canopy forests

[https://doi.org/10.5061/dryad.63xsj3vb9](https://doi.org/10.5061/dryad.63xsj3vb9)

Dataset author: Caden P. Chamberlain

Contact: [[e-mail]](mailto:[e-mail])

Manuscript author: Garrett Meigs

Contact: [[e-mail]](mailto:[e-mail])

Creation date: June 16, 2025

This dataset supports the analyses and results presented in \"Big trees burning: Divergent wildfire effects on large trees in open- vs. closed-canopy forests\". All primary analyses were conducted using R (version 4.3.1). Datasets that were produced by other means are included with this download, and a description of their creation process is included below.

## Description of the data and file structure

The parent directory folder (data_code_Meigs_et_al_v3_20250709.zip) contains all scripts, data, and files to run the primary and supplemental analyses. Users are encouraged to open and run t...,

野火活动随气候变化呈加剧态势，引发学界对蕴藏大型乔木的成熟林与老龄林遭受非典型火灾影响的广泛担忧。近期评估已记录美国太平洋西北地区因火灾导致的大乔木生境损失，但仍存在多项关键不确定性：不同森林组成类型下当代火灾与历史火灾的效应差异、封闭冠层与开放冠层内大型乔木的具体受影响情况，以及燃料减量化处理（fuel reduction treatments）所发挥的作用。本研究聚焦华盛顿州喀斯喀特山脉东部过火面积达4.3万公顷的2021年施耐德斯普林斯野火（Schneider Springs Fire），旨在解答三个相互关联的问题：（1）干旱、湿润与寒冷森林类型中的火烧烈度分布是否符合历史火制度（fire regime）？（2）不同森林结构等级的火烧烈度存在何种差异，尤其是具有开放冠层与封闭冠层的大型乔木？（3）燃料减量化处理对处理区内、外的火烧烈度存在何种影响？， ， ， # 大乔木燃烧：开放冠层与封闭冠层森林中大型乔木的差异化野火影响

DOI: 10.5061/dryad.63xsj3vb9

数据集作者：卡登·P·钱伯兰（Caden P. Chamberlain）

联系方式：[[e-mail]](mailto:[e-mail])

论文作者：加勒特·梅格斯（Garrett Meigs）

联系方式：[[e-mail]](mailto:[e-mail])

数据集创建日期：2025年6月16日

本数据集支撑了论文《大乔木燃烧：开放冠层与封闭冠层森林中大型乔木的差异化野火影响》中的分析与结果。所有核心分析均通过R语言（版本4.3.1）完成。本次下载包中包含其他途径生成的数据集，下文将对其创建流程进行说明。

## 数据与文件结构说明

父级目录文件夹（data_code_Meigs_et_al_v3_20250709.zip）包含了运行核心与补充分析所需的全部脚本、数据及相关文件。建议用户打开并运行t……