DOI: 10.1111/gcb.13703
论文题名: Loss of predator species, not intermediate consumers, triggers rapid and dramatic extinction cascades
作者: Donohue I. ; Petchey O.L. ; Kéfi S. ; Génin A. ; Jackson A.L. ; Yang Q. ; O'Connor N.E.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期: 8 起始页码: 2962
结束页码: 2972
语种: 英语
英文关键词: algae
; consumers
; ecological stability
; field experiment
; food web
; intertidal
; nontrophic interactions
; rocky shore
; secondary extinctions
; structural robustness
Scopus关键词: biodiversity
; community structure
; ecological stability
; extinction
; food web
; future prospect
; predator
; predator-prey interaction
; rocky shore
; trigger mechanism
; algae
英文摘要: Ecological networks are tightly interconnected, such that loss of a single species can trigger additional species extinctions. Theory predicts that such secondary extinctions are driven primarily by loss of species from intermediate or basal trophic levels. In contrast, most cases of secondary extinctions from natural systems have been attributed to loss of entire top trophic levels. Here, we show that loss of single predator species in isolation can, irrespective of their identity or the presence of other predators, trigger rapid secondary extinction cascades in natural communities far exceeding those generally predicted by theory. In contrast, we did not find any secondary extinctions caused by intermediate consumer loss. A food web model of our experimental system—a marine rocky shore community—could reproduce these results only when biologically likely and plausible nontrophic interactions, based on competition for space and predator-avoidance behaviour, were included. These findings call for a reassessment of the scale and nature of extinction cascades, particularly the inclusion of nontrophic interactions, in forecasts of the future of biodiversity. © 2017 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60879
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Department of Zoology, School of Natural Sciences, Trinity College Dublin, Dublin 2, Ireland; Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland; CNRS, IRD, EPHE, CC065, Institut des Sciences de l'Evolution, BioDICée team, Université de Montpellier, Montpellier, France
Recommended Citation:
Donohue I.,Petchey O.L.,Kéfi S.,et al. Loss of predator species, not intermediate consumers, triggers rapid and dramatic extinction cascades[J]. Global Change Biology,2017-01-01,23(8)