Romualdi D C, Wilkinson S L, James P M A
Institute of Forestry and Conservation, Daniels Faculty of Landscape, Architecture and Design, University of Toronto, 33 Willcocks St, Toronto, ON M5S 3B3 Canada.
Landsc Ecol. 2023;38(9):2159-2178. doi: 10.1007/s10980-023-01720-z. Epub 2023 Jul 13.
The mountain pine beetle (MPB; ) is a native bark beetle whose outbreaks leads to widespread conifer forest mortality. Of particular concern to forest and wildfire managers is the influence of MPB outbreaks on wildfire via spatial legacies left in impacted forest stands. There is, however, limited consensus in the literature regarding how MPB outbreaks affect wildfire across western North America.
This meta-analysis aims to (1) summarize available evidence regarding MPB-wildfire interactions, and (2) identify environmental and methodological indicators associated with various wildfire responses (i.e., amplified, neutral, or dampened) post-outbreak.
We include peer-reviewed publications focusing on MPB outbreaks and subsequent wildfire activity in forests across western Canada and the USA between 2000 and 2021. A classification scheme was used to examine attributes of each publication to assess which indicators contribute most to their associated wildfire response.
We found that spatial scale, forest fuels, and weather are main drivers of variation in wildfire response post-outbreak. Metrics of forest fuels and inclusion of weather data on a stand-scale are related to amplified fire responses, whereas dampened responses correspond to landscape-scale analyses. Furthermore, red-stage stands are associated with amplified fire response, whereas other stages are associated with dampened response-supporting current conceptual models of the importance of outbreak stage on wildfire.
Advancing our understanding regarding drivers of wildfire responses post-MPB outbreak is key to developing accurate, and comparative research studies. These findings provide crucial information for wildfire, and forest management agencies, especially in forests newly exposed to this disturbance interaction under climate change.
The online version contains supplementary material available at 10.1007/s10980-023-01720-z.
山地松甲虫（MPB）是一种本地树皮甲虫，其爆发会导致针叶林大面积死亡。森林和野火管理人员特别关注的是，MPB爆发通过受影响林分中留下的空间遗产对野火产生的影响。然而，关于MPB爆发如何影响北美西部的野火，文献中尚未达成共识。
本荟萃分析旨在（1）总结关于MPB与野火相互作用的现有证据，以及（2）确定与爆发后各种野火反应（即增强、中性或减弱）相关的环境和方法指标。
我们纳入了2000年至2021年间聚焦于加拿大西部和美国森林中MPB爆发及随后野火活动的同行评审出版物。使用一种分类方案来检查每份出版物的属性，以评估哪些指标对其相关的野火反应贡献最大。
我们发现空间尺度、森林燃料和天气是爆发后野火反应变化的主要驱动因素。森林燃料指标以及林分尺度上天气数据的纳入与增强的火灾反应相关，而减弱的反应则对应于景观尺度分析。此外，红色阶段的林分与增强的火灾反应相关，而其他阶段则与减弱的反应相关，这支持了当前关于爆发阶段对野火重要性的概念模型。
加深我们对MPB爆发后野火反应驱动因素的理解是开展准确且具有可比性的研究的关键。这些发现为野火和森林管理机构提供了关键信息，尤其是在气候变化下新受到这种干扰相互作用影响的森林中。
在线版本包含可在10.1007/s10980-023-01720-z获取的补充材料。
