Spatio-temporal dynamics of density-dependent dispersal during a population colonisation
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
Published in
Ecology LettersAuthors
Date
2019Discipline
Ekologia ja evoluutiobiologiaBiologisten vuorovaikutusten huippututkimusyksikköEcology and Evolutionary BiologyCentre of Excellence in Biological Interactions ResearchCopyright
© 2019 John Wiley & Sons Ltd/CNRS.
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.
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Wiley-Blackwell Publishing Ltd.ISSN Search the Publication Forum
1461-023XKeywords
Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/28904786
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Related funder(s)
Academy of FinlandFunding program(s)
Academy Project, AoF
Additional information about funding
Funding was provided by the Finnish Cultural Foundation (#00170177, #00180213 to SDB), the Academy of Finland (#295941 to ALS) and the National Science Foundation (#EF0623632 to DNR, PB, #1258231 to DNR, PB and ALS). This study would have been impossible without many students, interns and volunteers that participated in the collection of the data.License
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