DOI: 10.1111/gcb.14284
Scopus记录号: 2-s2.0-85047748014
论文题名: The effect of warmer winters on the demography of an outbreak insect is hidden by intraspecific competition
作者: Goodsman D.W. ; Grosklos G. ; Aukema B.H. ; Whitehouse C. ; Bleiker K.P. ; McDowell N.G. ; Middleton R.S. ; Xu C.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 8 起始页码: 3620
结束页码: 3628
语种: 英语
英文关键词: bark beetle
; climate change
; density dependence
; dynamics
; insect
; outbreak
; population ecology
Scopus关键词: beetle
; climate change
; demographic survey
; density dependence
; insect
; intraspecific competition
; population dynamics
; population outbreak
; warming
; winter
; North America
; Coleoptera
; Hexapoda
; Pinus mugo
; Scolytinae
英文摘要: Warmer climates are predicted to increase bark beetle outbreak frequency, severity, and range. Even in favorable climates, however, outbreaks can decelerate due to resource limitation, which necessitates the inclusion of competition for limited resources in analyses of climatic effects on populations. We evaluated several hypotheses of how climate impacts mountain pine beetle reproduction using an extensive 9-year dataset, in which nearly 10,000 trees were sampled across a region of approximately 90,000 km2, that was recently invaded by the mountain pine beetle in Alberta, Canada. Our analysis supports the hypothesis of a positive effect of warmer winter temperatures on mountain pine beetle overwinter survival and provides evidence that the increasing trend in minimum winter temperatures over time in North America is an important driver of increased mountain pine beetle reproduction across the region. Although we demonstrate a consistent effect of warmer minimum winter temperatures on mountain pine beetle reproductive rates that is evident at the landscape and regional scales, this effect is overwhelmed by the effect of competition for resources within trees at the site level. Our results suggest that detection of the effects of a warming climate on bark beetle populations at small spatial scales may be difficult without accounting for negative density dependence due to competition for resources. © 2018 The Authors. Global Change Biology Published by John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110309
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Earth and Environmental Science Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Department of Mathematics and Statistics, Utah State University, Logan, UT, United States; Department of Entomology, University of Minnesota, St Paul, MN, United States; Alberta Agriculture and Forestry, Forestry Division, Edmonton, AB, United States; Canadian Forest Service, Natural Resources CanadaBC, Canada; Pacific Northwest National Laboratory, Richland, WA, United States
Recommended Citation:
Goodsman D.W.,Grosklos G.,Aukema B.H.,et al. The effect of warmer winters on the demography of an outbreak insect is hidden by intraspecific competition[J]. Global Change Biology,2018-01-01,24(8)