DOI: 10.1111/gcb.12469
论文题名: Prey switching as a means of enhancing persistence in predators at the trailing southern edge
作者: Peers M.J.L. ; Wehtje M. ; Thornton D.H. ; Murray D.L.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期: 4 起始页码: 1126
结束页码: 1135
语种: 英语
英文关键词: Biotic variables
; Canada lynx
; Climate change
; Geographical mosaic
; MaxEnt
; Predator-prey mismatch
; Red squirrel
; Snowshoe hare
; Southern range
Scopus关键词: biotic factor
; climate change
; climate effect
; felid
; lagomorph
; local adaptation
; persistence
; predator-prey interaction
; prey availability
; prey preference
; rodent
; Lepus americanus
; Lynx
; Lynx canadensis
; Sciuridae
; Tamiasciurus
; Tamiasciurus hudsonicus
; animal
; Canada
; climate change
; ecosystem
; hare
; Lynx
; physiology
; predation
; Sciuridae
; theoretical model
; Animals
; Canada
; Climate Change
; Ecosystem
; Hares
; Lynx
; Models, Theoretical
; Predatory Behavior
; Sciuridae
英文摘要: Understanding the effects of climate change on species' persistence is a major research interest; however, most studies have focused on responses at the northern or expanding range edge. There is a pressing need to explain how species can persist at their southern range when changing biotic interactions will influence species occurrence. For predators, variation in distribution of primary prey owing to climate change will lead to mismatched distribution and local extinction, unless their diet is altered to more extensively include alternate prey. We assessed whether addition of prey information in climate projections restricted projected habitat of a specialist predator, Canada lynx (Lynx canadensis), and if switching from their primary prey (snowshoe hare; Lepus americanus) to an alternate prey (red squirrel; Tamiasciurus hudsonicus) mitigates range restriction along the southern range edge. Our models projected distributions of each species to 2050 and 2080 to then refine predictions for southern lynx on the basis of varying combinations of prey availability. We found that models that incorporated information on prey substantially reduced the total predicted southern range of lynx in both 2050 and 2080. However, models that emphasized red squirrel as the primary species had 7-24% lower southern range loss than the corresponding snowshoe hare model. These results illustrate that (i) persistence at the southern range may require species to exploit higher portions of alternate food; (ii) selection may act on marginal populations to accommodate phenotypic changes that will allow increased use of alternate resources; and (iii) climate projections based solely on abiotic data can underestimate the severity of future range restriction. In the case of Canada lynx, our results indicate that the southern range likely will be characterized by locally varying levels of mismatch with prey such that the extent of range recession or local adaptation may appear as a geographical mosaic. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61945
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Biology, Trent University, 2140 East Bank Drive, Peterborough, ON, K9J 7B8, Canada; Panthera, 8 West 40th Street, New York, NY 10018, United States; School of Environment, Washington State University, PO Box 642812, Pullman, WA, 99164-2812, United States
Recommended Citation:
Peers M.J.L.,Wehtje M.,Thornton D.H.,et al. Prey switching as a means of enhancing persistence in predators at the trailing southern edge[J]. Global Change Biology,2014-01-01,20(4)