A1 Journal article (refereed)
Spatio-temporal dynamics of density-dependent dispersal during a population colonisation (2019)

De Bona, S., Bruneaux, M., Lee, A., Reznick, D. N., Bentzen, P., & Lopez Sepulcre, A. (2019). Spatio-temporal dynamics of density-dependent dispersal during a population colonisation. Ecology Letters, 22(4), 634-644. https://doi.org/10.1111/ele.13205

JYU authors or editors

De Bona, Sebastiano
Bruneaux, Matthieu
Lee, Alexander
Lopez-Sepulcre, Andres

Publication details

All authors or editors: De Bona, Sebastiano; Bruneaux, Matthieu; Lee, Alexander; Reznick, David N.; Bentzen, Paul; Lopez Sepulcre, Andres

Journal or series: Ecology Letters

ISSN: 1461-023X

eISSN: 1461-0248

Publication year: 2019

Volume: 22

Issue number: 4

Pages range: 634-644

Publisher: Wiley-Blackwell Publishing Ltd.

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1111/ele.13205

Research data link: https://doi.org/10.5061/dryad.td54031

Publication open access: Not open

Publication channel open access:

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/64085

Additional information: The data supporting the manuscript, alongside the instructions to reproduce the analyses, are available from the Dryad Digital Repository.

Abstract

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.

Keywords: populations; population dynamics; spreading (process); Poeciliidae; kinship; emigration

Free keywords: breeding dispersal; individual-based data; landscape scale; movement; Poecilia reticulata; rapid evolution; slope of density dependence; translocation

Fields of science: