ArticleProceedings of the National Academy of Sciences of the United States of America2017
Density dependence in demography and dispersal generates fluctuating invasion speeds.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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15 citing papers in PubMed.
- Rewriting the history of the invasive spiny water flea in North America.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- The spread of non-native species.Biological reviews of the Cambridge Philosophical Society · 2026Review
- Population Dynamics of the Exotic FlatwormEcology and evolution · 2025Article
- Six personas to adopt when framing theoretical research questions in biology.Proceedings. Biological sciences · 2024Article
- Spread and persistence for integro-difference equations with shifting habitat and strong Allee effect.Journal of mathematical biology · 2024Article
- Chronosequence of invasion reveals minimal losses of population genomic diversity, niche expansion, and trait divergence in the polyploid, leafy spurge.Evolutionary applications · 2023Article
- Effects of co-occurrence and intra- and interspecific interactions between Drosophila suzukii and Zaprionus indianus.PloS one · 2023Article
- Density dependence and the spread of invasive big-headed ants (Pheidole megacephala) in an East African savanna.Oecologia · 2021Article
- Dispersals as demographic processes: testing and describing the spread of the Neolithic in the Balkans.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2021Article
- Landscape Genetics of Plants: Challenges and Opportunities.Plant communications · 2020Review
- Causes and consequences of individual variation in animal movement.Movement ecology · 2020Review
- Infection in patchy populations: Contrasting pathogen invasion success and dispersal at varying times since host colonization.Evolution letters · 2019Article
- Persistence and extinction of population in reaction-diffusion-advection model with strong Allee effect growth.Journal of mathematical biology · 2019Article
- Species distribution models throughout the invasion history of Palmer amaranth predict regions at risk of future invasion and reveal challenges with modeling rapidly shifting geographic ranges.Scientific reports · 2019Article
- Migration alters oscillatory dynamics and promotes survival in connected bacterial populations.Nature communications · 2018Article
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5 authors.
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Abstract
Density dependence plays an important role in population regulation and is known to generate temporal fluctuations in population density. However, the ways in which density dependence affects spatial population processes, such as species invasions, are less understood. Although classical ecological theory suggests that invasions should advance at a constant speed, empirical work is illuminating the highly variable nature of biological invasions, which often exhibit nonconstant spreading speeds, even in simple, controlled settings. Here, we explore endogenous density dependence as a mechanism for inducing variability in biological invasions with a set of population models that incorporate density dependence in demographic and dispersal parameters. We show that density dependence in demography at low population densities-i.e., an Allee effect-combined with spatiotemporal variability in population density behind the invasion front can produce fluctuations in spreading speed. The density fluctuations behind the front can arise from either overcompensatory population growth or density-dependent dispersal, both of which are common in nature. Our results show that simple rules can generate complex spread dynamics and highlight a source of variability in biological invasions that may aid in ecological forecasting.
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