Data and code from: Western larch regeneration more sensitive to wildfire-related factors than seasonal climate variability

To understand the impacts of changing climate and wildfire activity on conifer forests, we studied how wildfire and seasonal post-fire climate conditions influence western larch (Larix occidentalis) regeneration across its range in the northwestern US. We destructively sampled 1651 seedlings from 57 sites within 32 fires that burned at moderate or high severity between 2000 and 2015, and which were within 100 m of reproductively mature western larch. Using dendrochronological methods, we estimated germination years of seedlings to calculate annual recruitment rates. We used boosted regression trees to model the annual probability of recruitment as a function of (i) “wildfire-related factors” including distance-to-seed-source, satellite-derived fire severity, and time-since-fire, and (ii) seasonal climate conditions, including variables reflecting temperature and water availability. Most recruitment occurred within five years after wildfire, at sites within 25 m of reproductively mature ..., , , # Impacts of climate and wildfire on western larch regeneration

[https://doi.org/10.5061/dryad.0k6djhb6r](https://doi.org/10.5061/dryad.0k6djhb6r)

Authors: Spencer T. Vieira, Kimberley T. Davis, Zachary A. Holden, Andrew J. Larson, and Philip E. Higuera

Journal: Forest Ecology and Management

## FILES' NAMES AND CONTENTS

`Vieira_et_al_climate_timeseries.csv`

* For each year: summer minimum soil moisture, recruitment season (April to May) mean soil moisture, recruitment season mean temperature, summer maximum surface temperature, growing degree days above 5 degrees C, growing season (May to Sept.) climatic water deficit, and growing season actual evapotranspiration (climatic water deficit and actual evapotranspiration are included at both 30m and 250m pixel resolution).
* 30-yr mean annual climatic water deficit (1991 to 2020)

`Vieira_et_al__plot_data.csv`

* Annual recruitment and site information for each site.

`GIS_Data` [Folder]

* Rehfeldt_laoc_distro_complete.shp
* Total w...,

为明确气候变化与野火活动对针叶林的影响，本研究探究了野火及火后季节气候条件如何影响美国西北部分布范围内的西部落叶松（Larix occidentalis）的天然更新过程。我们于2000至2015年间，在发生过中度或高强度火烧的32处火场中选取57个样地，破坏性采集了1651株实生苗样本，所有样地均位于距具有繁殖能力的成熟西部落叶松100米范围内。利用树轮年代学方法，我们估算了实生苗的萌发年份以计算年更新率。随后采用提升回归树（boosted regression trees）构建模型，以更新发生的年概率为因变量，自变量分为两类：一是“野火相关因子”，包括种源距离、卫星反演火烧烈度、火后间隔时间；二是季节气候因子，涵盖反映温度与水分可利用性的各类变量。绝大多数更新事件发生在野火发生后的五年内，且集中于距成熟繁殖个体25米范围内的样地……

# 气候与野火对西部落叶松天然更新的影响

https://doi.org/10.5061/dryad.0k6djhb6r

作者：Spencer T. Vieira、Kimberley T. Davis、Zachary A. Holden、Andrew J. Larson 与 Philip E. Higuera

期刊：《Forest Ecology and Management（森林生态学与管理）》

## 文件名称与内容

`Vieira_et_al_climate_timeseries.csv`
* 按年份统计的气象数据包括：夏季土壤最低含水量、更新季（4月至5月）平均土壤含水量、更新季平均气温、夏季地表最高温、5℃以上生长积温、生长季（5月至9月）气候水分亏缺，以及生长季实际蒸散量（气候水分亏缺与实际蒸散量均提供30米与250米两种像素分辨率数据）；另包含1991年至2020年的30年平均年气候水分亏缺。

`Vieira_et_al__plot_data.csv`
* 包含各站点的年更新数据与样地基本信息。

`GIS_Data` [文件夹]
* Rehfeldt_laoc_distro_complete.shp
* 西部落叶松完整分布数据集（原文内容不完整）