Scopus记录号: 2-s2.0-85061048499
论文题名: Spatio-temporal dynamics of density-dependent dispersal during a population colonisation
作者: De Bona S. ; Bruneaux M. ; Lee A.E.G. ; Reznick D.N. ; Bentzen P. ; López-Sepulcre A.
刊名: Ecology Letters
ISSN: 1461023X
出版年: 2019
卷: 22, 期: 4 起始页码: 634
结束页码: 644
语种: 英语
英文关键词: Breeding dispersal
; emigration
; individual-based data
; kinship
; landscape scale
; movement
; Poecilia reticulata
; rapid evolution
; slope of density dependence
; translocation
Scopus关键词: Poecilia reticulata
英文摘要: Predicting population colonisations requires understanding how spatio-temporal changes in density affect dispersal. Density can inform on fitness prospects, acting as a cue for either habitat quality, or competition over resources. However, when escaping competition, high local density should only increase emigration if lower-density patches are available elsewhere. Few empirical studies on dispersal have considered the effects of density at the local and landscape scale simultaneously. To explore this, we analyze 5 years of individual-based data from an experimental introduction of wild guppies Poecilia reticulata. Natal dispersal showed a decrease in local density dependence as density at the landscape level increased. Landscape density did not affect dispersal among adults, but local density-dependent dispersal switched from negative (conspecific attraction) to positive (conspecific avoidance), as the colonisation progressed. This study demonstrates that densities at various scales interact to determine dispersal, and suggests that dispersal trade-offs differ across life stages. © 2019 John Wiley & Sons Ltd/CNRS 资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122711
Appears in Collections: 气候变化事实与影响
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作者单位: University of Jyväskylä, Centre of Excellence in Biological Interactions, Department of Biological and Environmental Science, Jyväskylä, Finland; Department of Biology, University of California, Riverside, CA, United States; Department of Biology, Dalhousie University, Halifax, Canada; CNRS, UMR 7618, Institute of Ecology and Environmental Sciences Paris (iEES), Sorbonne University, Paris, France
Recommended Citation:
De Bona S.,Bruneaux M.,Lee A.E.G.,et al. Spatio-temporal dynamics of density-dependent dispersal during a population colonisation[J]. Ecology Letters,2019-01-01,22(4)