气候变化领域集成服务门户(CCPortal): Drivers of lodgepole pine recruitment across a gradient of bark beetle outbreak and wildfire in British Columbia

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DOI	10.1016/j.foreco.2019.117500
	Drivers of lodgepole pine recruitment across a gradient of bark beetle outbreak and wildfire in British Columbia
	Talucci A.C.; Lertzman K.P.; Krawchuk M.A.
发表日期	2019
ISSN	0378-1127
卷号	451
英文摘要	Seedbanks are essential for forest resilience, and disturbance interactions could potentially modify seedbank availability, subsequent forest regeneration patterns, and successional trajectories. Regional mountain pine beetle outbreaks have altered forest structure and seedbanks in fire prone-landscapes across western North America and could influence forest regeneration. We examined the drivers of lodgepole pine recruitment across a gradient of fire severity from fire that burned through gray-phase outbreak conditions in central interior British Columbia, Canada. We considered ten potential drivers of lodgepole pine recruitment including: fire severity, mountain pine beetle outbreak severity, cone abundance, branch retention, open cones, exposed soil, snag fall, snow accumulation, climate moisture deficit, and frost events, as well as the contribution of unburned fire refugia to lodgepole pine recruitment. In 2016, we inventoried 83 plots that spanned gradients of outbreak severity, burning conditions, and fire severity across three fires that burned through lodgepole pine dominated forests with gray-phase conditions that had moderate to high mortality. We used generalized linear models to evaluate drivers of variability in seedling recruitment. Our analyses affirm that wildfire is a critical mechanism for lodgepole pine seedling recruitment. For plots that burned as crown and surface fire, recruitment densities were two or six times greater compared plots that experienced light surface or were fire refugia, respectively. Recruitment was driven by cone abundance indicating the importance of an available seed source. In fire refugia, recruitment was three times greater during the post-outbreak period compared to before outbreaks, suggesting cone senescence from mortality and/or xeriscent-cueing of cones. The unevenness in recruitment across gradients of outbreak and fire severity contribute to the heterogeneity of stand initiation across these landscapes that may be important for mediation of subsequent outbreaks. © 2019 Elsevier B.V.
英文关键词	Fire refugia; Fire severity; Mountain pine beetle; Postfire climate; Resilience; Seedlings; Serotiny; Snag fall
语种	英语
scopus关键词	Landforms; Reforestation; Fire severity; Mountain pine beetle; Post-fire; Resilience; Seedlings; Serotiny; Snag fall; Fires; beetle; coniferous tree; ecosystem resilience; pest outbreak; recruitment (population dynamics); refuge; seedling; serotiny; snag; wildfire; Fires; Pinus Contorta; Recruitment; Reforestation; Resilience; Seedlings; Serotiny; British Columbia; Canada; Coleoptera; Pinus contorta; Pinus mugo; Scolytinae
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155784
作者单位	Department of Forest Ecosystems and Society, Oregon State University, Corvallis, OR 97331, United States; School of Resource and Environmental Management, Simon Fraser University, Burnaby, British Columbia, Canada
推荐引用方式 GB/T 7714	Talucci A.C.,Lertzman K.P.,Krawchuk M.A.. Drivers of lodgepole pine recruitment across a gradient of bark beetle outbreak and wildfire in British Columbia[J],2019,451.
APA	Talucci A.C.,Lertzman K.P.,&Krawchuk M.A..(2019).Drivers of lodgepole pine recruitment across a gradient of bark beetle outbreak and wildfire in British Columbia.Forest Ecology and Management,451.
MLA	Talucci A.C.,et al."Drivers of lodgepole pine recruitment across a gradient of bark beetle outbreak and wildfire in British Columbia".Forest Ecology and Management 451(2019).