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DOI	10.1016/j.foreco.2019.02.011
	Multiyear weather anomalies associated with range shifts by the mountain pine beetle preceding large epidemics
	Sambaraju K.R.; Carroll A.L.; Aukema B.H.
发表日期	2019
ISSN	0378-1127
起始页码	86
结束页码	95
卷号	438
英文摘要	The recent range expansion of the mountain pine beetle, Dendroctonus ponderosae Hopk. (Coleoptera: Curculionidae), into evolutionarily naïve lodgepole and jack pine forests of northwestern Canada has triggered concern that continued eastward expansion through the boreal forest will threaten other pine species native to eastern North America. This unprecedented breach of a historic geoclimatic barrier was precipitated by a “hyperepidemic” west of the Rocky Mountains comprising the largest mountain pine beetle eruption in recorded history. We assessed climate-related latitudinal shifts of pre-outbreak populations of mountain pine beetle in western Canada over a 26-year period preceding the hyperepidemic, as movements of pre-outbreak populations determine, in part, the extent of subsequent outbreaks. We used digitized records of annual aerial overview surveys (1965–1979, 1986–1996) of tree-killing activity, comprising > 122,000 individual infestation polygons, and temperature and aridity data to associate trends in deviations of weather variables from historical averages with latitudinal shifts by the insect. Overall, we found that seasonal and multiyear weather phenomena such as anomalous temperature increases in a stable aridity regime, or vice-versa, and warmer-than-normal winter temperatures explained small but significant variation in northward annual range shifts after factoring out spatial and temporal variation. The numbers of discrete, tree-killing infestations increased rapidly during 1965–1979, and northward range shifts of 300 km in the early 1970s coincided with abnormally dry conditions. Mountain pine beetle populations advanced northward by 391 km from 1965 to 1996. Consistently high infestation levels of the mountain pine beetle occurred simultaneously with above-average temperatures that extended for nearly a decade immediately preceding the hyperepidemic. Climate-associated range shifts can provide gateways to rapid range expansions, and evoke concern with regard to future impacts of other bark beetle species inhabiting regions likely to experience multiyear droughts and/or temperature increases under climate change. © 2019
英文关键词	Climate change; Dendroctonus ponderosae; Drought; Hyperepidemic; Latitude; Lodgepole pine; Temperature
语种	英语
scopus关键词	Antennas; Climate change; Drought; Expansion; Landforms; Temperature; Dendroctonus ponderosae; Eastern north america; Hyperepidemic; Latitude; Lodgepole pine; Mountain pine beetle; Spatial and temporal variation; Temperature increase; Forestry; anomaly; aridity; beetle; boreal forest; climate conditions; coniferous tree; drought; epidemic; latitude; pest outbreak; range expansion; temperature; temperature anomaly; weather; Drought; Expansion; Forestry; Latitude; Pinus Contorta; Temperature; Canada; North America; Rocky Mountains; Coleoptera; Curculionidae; Dendroctonus ponderosae; Hexapoda; Pinus banksiana; 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/156115
作者单位	Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, 1055 du P.E.P.S., Stn. Sainte-Foy, Québec, QC G1V 4C7, Canada; Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada; Department of Entomology, University of Minnesota, 432 Hodson Hall, 1980 Folwell Avenue, St. Paul, MN 55118, United States
推荐引用方式 GB/T 7714	Sambaraju K.R.,Carroll A.L.,Aukema B.H.. Multiyear weather anomalies associated with range shifts by the mountain pine beetle preceding large epidemics[J],2019,438.
APA	Sambaraju K.R.,Carroll A.L.,&Aukema B.H..(2019).Multiyear weather anomalies associated with range shifts by the mountain pine beetle preceding large epidemics.Forest Ecology and Management,438.
MLA	Sambaraju K.R.,et al."Multiyear weather anomalies associated with range shifts by the mountain pine beetle preceding large epidemics".Forest Ecology and Management 438(2019).