Fitness maximization by dispersal: evidence from an invasion experiment

Bonte, Dries; Roissart, Annelies De; Wybouw, Nicky; Leeuwen, T.B.S. Van

doi:10.1890/13-2269.1

Cited by 45 publications

(54 citation statements)

References 55 publications

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“…Such phenotypic differences have frequently been reported [7] and are known to affect the balance between the costs and benefits of dispersal [39]. Recent studies have shown that natural selection may favour the associations between dispersal and other phenotypic traits allowing individuals to reduce dispersal costs and thus lead to the evolution of dispersal syndromes (e.g.…”

Section: Discussionmentioning

confidence: 99%

Natal dispersers pay a lifetime cost to increased reproductive effort in a wild bird population

2017

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Natal dispersal is assumed to be costly. Such costs can be difficult to detect, and fitness consequences of dispersal are therefore poorly known. Because of lower phenotypic quality and/or familiarity with the environment, natal dispersers may be less buffered against a sudden increase in reproductive effort. Consequently, reproductive costs associated with natal dispersal may mostly be detected in harsh breeding conditions. We tested this prediction by comparing lifetime reproductive success between natal dispersers and non-dispersers in a patchy population of collared flycatchers ( Ficedula albicollis ) when they reared either a non-manipulated brood or an experimentally increased or decreased brood. Natal dispersers achieved lower lifetime reproductive success than non-dispersers only under more stressful breeding conditions (i.e. when brood size was experimentally increased). This was mostly due to a lower number of recruits produced in the year of the increase. Our results suggest a cost associated with natal dispersal paid immediately after an increase in reproductive effort and not subsequently compensated for through increased survival or future offspring recruitment. Natal dispersers adjusted their breeding investment when reproductive effort is as predicted but seemed unable to efficiently face a sudden increase in effort, which could affect the influence of environmental predictability on dispersal evolution.

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Section: Discussionmentioning

confidence: 99%

Natal dispersers pay a lifetime cost to increased reproductive effort in a wild bird population

2017

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“…Freshly matured females constitute the dispersing phenotype in this species (Smitley & Kennedy ; Li & Margolis ; Bonte et al . ; Fronhofer et al . ; Van Petegem et al .…”

Section: Methodsmentioning

confidence: 99%

Spatial and spatiotemporal variation in metapopulation structure affects population dynamics in a passively dispersing arthropod

Roissart

Wang

Bonte

2015

Journal of Animal Ecology

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The spatial and temporal variation in the availability of suitable habitat within metapopulations determines colonization-extinction events, regulates local population sizes and eventually affects local population and metapopulation stability. Insights into the impact of such a spatiotemporal variation on the local population and metapopulation dynamics are principally derived from classical metapopulation theory and have not been experimentally validated. By manipulating spatial structure in artificial metapopulations of the spider mite Tetranychus urticae, we test to which degree spatial (mainland-island metapopulations) and spatiotemporal variation (classical metapopulations) in habitat availability affects the dynamics of the metapopulations relative to systems where habitat is constantly available in time and space (patchy metapopulations). Our experiment demonstrates that (i) spatial variation in habitat availability decreases variance in metapopulation size and decreases density-dependent dispersal at the metapopulation level, while (ii) spatiotemporal variation in habitat availability increases patch extinction rates, decreases local population and metapopulation sizes and decreases density dependence in population growth rates. We found dispersal to be negatively density dependent and overall low in the spatial variable mainland-island metapopulation. This demographic variation subsequently impacts local and regional population dynamics and determines patterns of metapopulation stability. Both local and metapopulation-level variabilities are minimized in mainland-island metapopulations relative to classical and patchy ones.

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“…In the case of measuring fitness of dispersal-related traits, fitness should be assessed in natal and colonized environments and the causes of any fitness variation, as they relate to the phenotypes and behaviours of individuals, their relatedness, the population density, and environmental quality of the different sites, need to be identified and quantified (Stinchcombe et al, 2002;Bonte et al, 2014).…”

Section: Using Multivariate Selection To Ask When Dispersal Is mentioning

confidence: 99%

“…Determining the relative importance of these factors has been the primary objective of recent empirical studies on the evolutionary causes of dispersal (e.g. Matthysen, 2012;Bitume et al, 2013;Bonte et al, 2014). The emerging synthesis of the ecology and evolution of dispersal emphasizes how these selective processes can lead to individual differences in multiple traits and behaviours related to their dispersal patterns, and that the evolution of dispersal can only be understood in the context of multiple life-history traits (Clobert et al, 2009Bonte et al, 2012;Stevens et al, 2012;Buoro & Carlson, 2014).…”

Section: Introductionmentioning

confidence: 99%

When is dispersal for dispersal? Unifying marine and terrestrial perspectives

Baskett²,

et al. 2015

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Recent syntheses on the evolutionary causes of dispersal have focused on dispersal as a direct adaptation, but many traits that influence dispersal have other functions, raising the question: when is dispersal 'for' dispersal? We review and critically evaluate the ecological causes of selection on traits that give rise to dispersal in marine and terrestrial organisms. In the sea, passive dispersal is relatively easy and specific morphological, behavioural, and physiological adaptations for dispersal are rare. Instead, there may often be selection to limit dispersal. On land, dispersal is relatively difficult without specific adaptations, which are relatively common. Although selection for dispersal is expected in both systems and traits leading to dispersal are often linked to fitness, systems may differ in the extent to which dispersal in nature arises from direct selection for dispersal or as a by-product of selection on traits with other functions. Our analysis highlights incompleteness of theories that assume a simple and direct relationship between dispersal and fitness, not just insofar as they ignore a vast array of taxa in the marine realm, but also because they may be missing critically important effects of traits influencing dispersal in all realms.

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Fitness maximization by dispersal: evidence from an invasion experiment

Cited by 45 publications

References 55 publications

Natal dispersers pay a lifetime cost to increased reproductive effort in a wild bird population

Natal dispersers pay a lifetime cost to increased reproductive effort in a wild bird population

Spatial and spatiotemporal variation in metapopulation structure affects population dynamics in a passively dispersing arthropod

When is dispersal for dispersal? Unifying marine and terrestrial perspectives

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