气候变化领域集成服务门户(CCPortal): Post-fire regeneration of endangered limber pine (Pinus flexilis) at the northern extent of its range

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DOI	10.1016/j.foreco.2019.117725
	Post-fire regeneration of endangered limber pine (Pinus flexilis) at the northern extent of its range
	Dawe D.A.; Peters V.S.; Flannigan M.D.
发表日期	2020
ISSN	0378-1127
卷号	457
英文摘要	Limber pine (Pinus flexilis), an understudied tree species important to montane and subalpine ecosystems, is listed as endangered in Alberta. Dispersal of seeds to newly disturbed, open areas by Clark's nutcracker (Nucifraga columbiana) is expected to facilitate post-disturbance establishment of limber pine. Prescribed burning has thus been proposed as a tool to stimulate natural regeneration, but no studies have yet surveyed limber pine's regenerative response to disturbance at the northernmost extent of its range. We examined post-fire regeneration in one prescribed burn and one wildfire at the northern edge of limber pine's distribution and compared this to a regeneration baseline of plots in nearby unburned limber pine acting as seed sources to the burns. Using a likelihood-based approach, we then compared hypotheses of ecological processes influencing seedling occurrence and abundance. Overall, we found only six post-fire limber pine seedlings within the burns, as compared to one hundred twenty-four similarly aged seedlings found in unburned plots. Akaike information criterion (AIC) identified distance to a seed source and absence of canopy cover as hurdles for seedling establishment in the burn. Analysis of seedling abundance was performed on only the unburned dataset due to low regeneration in the burned areas surveyed; model selection here showed that when distance to a seed source is small, substrate variables, including less prevalent bare mineral soil, more rocky cover, and finer soil textures, take on an important role in driving abundance. Substrates important for limber pine abundance in unburned stands were found with similar frequency in the burns, indicating limber pine colonization post-disturbance was not substrate limited but instead constrained by other factors. Our findings suggest that extensive prescribed burns and stand-replacing wildfire events at the northern extent of limber pine's range may have limited seedling regeneration in the immediate post-fire period. Conservation efforts may be well-served by focusing on fire mitigation efforts, such as thinning and other fuel treatments, in areas surrounding established limber pine stands. Finally, post-disturbance stands could benefit from supplementary seedling plantings to achieve recovery plan restoration goals for this endangered species. © 2019 The Authors
英文关键词	Endangered species recovery; Fire ecology; Limber pine; Pinus flexilis; Prescribed fire; Seedling regeneration
语种	英语
scopus关键词	Conservation; Fires; Reforestation; Substrates; Surveys; Textures; Endangered species; Fire ecology; Limber pines; Pinus flexilis; Prescribed fires; Seedling regeneration; Ecology; Akaike information criterion; colonization; endangered species; forest fire; prescribed burning; recovery plan; regeneration; seedling establishment; wildfire; Conservation; Fires; Pinus Flexilis; Reforestation; Substrates; Surveys; Alberta; Canada; Nucifraga columbiana; Pinus flexilis
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/155571
作者单位	Department of Renewable Resources, University of Alberta, Edmonton, AB T6G 2H1, Canada; Department of Biology, The King's University, Edmonton, AB T6B 2H3, Canada; Canadian Partnership for Wildland Fire Science, Department of Renewable Resources, University of Alberta, Edmonton, AB T6G 2H1, Canada
推荐引用方式 GB/T 7714	Dawe D.A.,Peters V.S.,Flannigan M.D.. Post-fire regeneration of endangered limber pine (Pinus flexilis) at the northern extent of its range[J],2020,457.
APA	Dawe D.A.,Peters V.S.,&Flannigan M.D..(2020).Post-fire regeneration of endangered limber pine (Pinus flexilis) at the northern extent of its range.Forest Ecology and Management,457.
MLA	Dawe D.A.,et al."Post-fire regeneration of endangered limber pine (Pinus flexilis) at the northern extent of its range".Forest Ecology and Management 457(2020).