气候变化领域集成服务门户(CCPortal): Recent mountain pine beetle outbreaks; wildfire severity; and postfire tree regeneration in the US Northern Rockies

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DOI	10.1073/pnas.1411346111
	Recent mountain pine beetle outbreaks; wildfire severity; and postfire tree regeneration in the US Northern Rockies
	Harvey B.J.; Donato D.C.; Turner M.G.
发表日期	2014
ISSN	0027-8424
起始页码	15120
结束页码	15125
卷号	111 期号:42
英文摘要	Widespread tree mortality caused by outbreaks of native bark beetles (Circulionidae: Scolytinae) in recent decades has raised concern among scientists and forest managers about whether beetle outbreaks fuel more ecologically severe forest fires and impair postfire resilience. To investigate this question, we collected extensive field data following multiple fires that burned subalpine forests in 2011 throughout the Northern Rocky Mountains across a spectrum of prefire beetle outbreak severity, primarily from mountain pine beetle (Dendroctonus ponderosae). We found that recent (2001-2010) beetle outbreak severity was unrelated to most field measures of subsequent fire severity,which was instead driven primarily by extreme burning conditions (weather) and topography. In the red stage (0-2 y following beetle outbreak), fire severity was largely unaffected by prefire outbreak severity with few effects detected only under extreme burning conditions. In the gray stage (3-10 y following beetle outbreak), fire severity was largely unaffected by prefire outbreak severity under moderate conditions, but several measures related to surface fire severity increased with outbreak severity under extreme conditions. Initial postfire tree regeneration of the primary beetle host tree [lodgepole pine (Pinus contorta var. latifolia)] was not directly affected by prefire outbreak severity but was instead driven by the presence of a canopy seedbank and by fire severity. Recent beetle outbreaks in subalpine forests affected few measures of wildfire severity and did not hinder the ability of lodgepole pine forests to regenerate after fire, suggesting that resilience in subalpine forests is not necessarily impaired by recent mountain pine beetle outbreaks.
英文关键词	Conifer forest; Disturbance interactions; Fire ecology; Forest resilience; Serotiny
语种	英语
scopus关键词	animal; Bayes theorem; beetle; climate; ecology; ecosystem; fire; forest; physiology; pine; seedling; statistical model; tree; United States; weather; Animals; Bayes Theorem; Beetles; Climate; Ecology; Ecosystem; Fires; Forests; Models, Statistical; Pinus; Seedlings; Trees; United States; Weather
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159103
作者单位	Harvey, B.J., Department of Zoology, University of Wisconsin-Madison, Madison, WI 53706, United States; Donato, D.C., Washington State Department of Natural Resources, Olympia, WA 98504, United States; Turner, M.G., Department of Zoology, University of Wisconsin-Madison, Madison, WI 53706, United States
推荐引用方式 GB/T 7714	Harvey B.J.,Donato D.C.,Turner M.G.. Recent mountain pine beetle outbreaks; wildfire severity; and postfire tree regeneration in the US Northern Rockies[J],2014,111(42).
APA	Harvey B.J.,Donato D.C.,&Turner M.G..(2014).Recent mountain pine beetle outbreaks; wildfire severity; and postfire tree regeneration in the US Northern Rockies.Proceedings of the National Academy of Sciences of the United States of America,111(42).
MLA	Harvey B.J.,et al."Recent mountain pine beetle outbreaks; wildfire severity; and postfire tree regeneration in the US Northern Rockies".Proceedings of the National Academy of Sciences of the United States of America 111.42(2014).