DOI: 10.1111/gcb.13734
论文题名: Colour polymorphism is associated with lower extinction risk in birds
作者: Ducatez S. ; Giraudeau M. ; Thébaud C. ; Jacquin L.
刊名: Global Change Biology
出版年: 2017
卷: 23, 期: 8 起始页码: 3030
结束页码: 3039
语种: 英语
英文关键词: colour polymorphism
; conservation status
; extinction threats
; genetic diversity
; habitat alteration
; invasive species
; IUCN red list
; phylogenetic generalized linear mixed model
Scopus关键词: bird
; color
; conservation status
; environmental change
; extinction risk
; habitat selection
; invasive species
; polymorphism
; Red List
; Aves
英文摘要: Colour polymorphisms have played a major role in enhancing current understanding of how selection and demography can impact phenotypes. Because different morphs often display alternative strategies and exploit alternative ecological niches, colour polymorphism can be expected to promote adaptability to environmental changes. However, whether and how it could influence populations' and species' response to global changes remains debated. To address this question, we built an up-to-date and complete database on avian colour polymorphism based on the examination of available data from all 10,394 extant bird species. We distinguished between true polymorphism (where different genetically determined morphs co-occur in sympatry within the same population) and geographic variation (parapatric or allopatric colour variation), because these two patterns of variation are expected to have different consequences on populations' persistence. Using the IUCN red list, we then showed that polymorphic bird species are at lesser risk of extinction than nonpolymorphic ones, after controlling for a range of factors such as geographic range size, habitat breadth, life history, and phylogeny. This appears consistent with the idea that high genetic diversity and/or the existence of alternative strategies in polymorphic species promotes the ability to adaptively respond to changing environmental conditions. In contrast, polymorphic species were not less vulnerable than nonpolymorphic ones to specific drivers of extinction such as habitat alteration, direct exploitation, climate change, and invasive species. Thus, our results suggest that colour polymorphism acts as a buffer against environmental changes, although further studies are now needed to understand the underlying mechanisms. Developing accurate quantitative indices of sensitivity to specific threats is likely a key step towards a better understanding of species response to environmental changes. © 2017 John Wiley & Sons Ltd 资助项目: Ducatez, S.
; School of Biological Sciences, University of SydneyAustralia
; 电子邮件: simon.ducatez@gmail.com
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60882
Appears in Collections: 影响、适应和脆弱性
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作者单位: School of Biological Sciences, University of Sydney, Sydney, NSW, Australia; Department of Biology, McGill University, Montréal, QC, Canada; CREAF, Cerdanyola del Vallès, Spain; School of Life Sciences, Arizona State University, Tempe, AZ, United States; Centre for Ecology & Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn, United Kingdom; CNRS, ENFA, UMR 5174 EDB (Laboratoire Évolution & Diversité Biologique), Université Toulouse 3 Paul Sabatier, Toulouse, France; CNRS, UMR 5174 EDB, Université Paul Sabatier, Toulouse, France
Recommended Citation:
Ducatez S.,Giraudeau M.,Thébaud C.,et al. Colour polymorphism is associated with lower extinction risk in birds[J]. Global Change Biology,2017-01-01,23(8)