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Spatio-temporal dynamics of density-dependent dispersal during a population colonisation
Sebastiano De Bona1, Matthieu Bruneaux1, Alex E G Lee1
1University of Jyväskylä, Centre of Excellence in Biological Interactions, Department of Biological and Environmental Science, Jyväskylä, Finland.
Ecology Letters
|February 5, 2019
Summary
Population colonisation depends on how density affects dispersal. Guppy dispersal showed density at different scales interact, with life stage affecting trade-offs.
Area of Science:
- Ecology
- Evolutionary Biology
- Behavioral Ecology
Background:
- Predicting population colonisation hinges on understanding density-dependent dispersal.
- Density cues habitat quality and competition, influencing emigration decisions.
- Simultaneous analysis of local and landscape density effects on dispersal is empirically rare.
Discussion:
- Natal dispersal in guppies exhibited reduced local density dependence with increased landscape density.
- Adult guppy dispersal was unaffected by landscape density.
- Local density-dependent dispersal shifted from attraction to avoidance as colonisation progressed.
Key Insights:
- Dispersal patterns are shaped by interacting local and landscape densities.
- Density-dependent conspecific attraction/avoidance varies with colonisation stage.
- Life-stage specific trade-offs influence dispersal strategies.
Outlook:
- Further research into multi-scale density effects on dispersal is warranted.
- Understanding these dynamics is crucial for predicting species range shifts and managing invasive populations.
- Investigating dispersal trade-offs across different life stages can refine ecological models.
Keywords:
Poecilia reticulataBreeding dispersalemigrationindividual-based datakinshiplandscape scalemovementrapid evolutionslope of density dependencetranslocationMore Related Videos
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