Reduced dispersal propensity in the wingless waterstrider Aquarius najas in a highly fragmented landscape

Ahlroth, Petri; Alatalo, Rauno V.; Suhonen, Jukka

doi:10.1007/s00442-009-1457-z

Cited by 13 publications

(15 citation statements)

References 54 publications

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“…According to Roff and Fairbairn (2007), dispersal may be a risky strategy, especially for species that inhabit very isolated habitat patches (Ahlroth et al, 2010), such as M. brachyptera (Poniatowski & Fartmann, 2010). With increasing isolation, the probability of failing to find a suitable habitat increases, which presumably results in a decrease in the survival rate of dispersing individuals (Harrison, 1980).…”

Section: Resultsmentioning

confidence: 99%

Dispersal capability in a habitat specialist bush cricket: the role of population density and habitat moisture

Poniatowski

Fartmann

2011

Ecological Entomology

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1. In fragmented landscapes many insect species depend on a regular exchange of individuals between subpopulations to ensure the persistence of the population. Thus, the ability to disperse is of particular relevance.2. However, in some insect species mobility is not a fixed trait. Hence, knowing the causes of phenotypic plasticity is of great importance when evaluating whether a species is able to survive in fragmented landscapes or not.3. A multi-year field study was conducted to identify possible causes of macroptery in the wing-dimorphic habitat specialist Metrioptera brachyptera L. and to quantify its dispersal capability (% macropters). Therefore, 746 individuals of the species were caught on 135 plots. Additionally, environmental variables that possibly induce the development of macropters (population density and habitat moisture) were recorded.4. Dispersal capability of M. brachyptera was very low. Less than 3% were long-winged. The statistical analysis revealed that the proportion of long-winged M. brachyptera was strongly correlated with high bush-cricket densities and not with habitat moisture. 5. The low dispersal capability of M. brachyptera leads to the conclusion that individual exchange between isolated populations is limited or even impossible. Habitat specialists, like M. brachyptera, may thus be unable to respond to rapid changes in the availability of suitable habitats by dispersing, and hence may be especially dependent on habitat management activities that promote the long-term stability of existing habitat patches.

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Section: Resultsmentioning

confidence: 99%

Dispersal capability in a habitat specialist bush cricket: the role of population density and habitat moisture

Poniatowski

Fartmann

2011

Ecological Entomology

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“…Yet, if retention is partially the result of active behaviors and larval traits, then so might dispersal, depending on the situation. The propensity of individuals toward dispersal in several terrestrial species was shown to be genetically inherited (Haag et al 2005;Ahlroth et al 2010;Bitume et al 2011) or maternally induced (Tschirren et al 2007), according to local environmental conditions. The tendency of marine larvae to return to the natal patch or disperse might accordingly evolve as a function of increased habitat patchiness (Baskett et al 2007) or local conditions (Bowler and Benton 2011).…”

Section: Patterns Of Local Retentionmentioning

confidence: 99%

Not finding Nemo: limited reef-scale retention in a coral reef fish

et al. 2015

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The spatial scale of larval dispersal is a key predictor of marine metapopulation dynamics and an important factor in the design of reserve networks. Over the past 15 yr, studies of larval dispersal in coral reef fishes have generated accumulating evidence of consistently high levels of self-recruitment and local retention at various spatial scales. These findings have, to a certain degree, created a paradigm shift toward the perception that large fractions of locally produced recruitment may be the rule rather than the exception. Here we examined the degree of localized settlement in an anemonefish, Amphiprion bicinctus, at a solitary coral reef in the central Red Sea by integrating estimates of self-recruitment obtained from genetic parentage analysis with predictions of local retention derived from a biophysical dispersal model parameterized with real-time physical forcing. Self-recruitment at the reef scale (c. 0.7 km 2 ) was virtually absent during two consecutive January spawning events (1.4 % in 2012 and 0 % in 2013). Predicted levels of local retention at the reef scale varied temporally, but were comparatively low for both simulations (7 % in 2012 and 0 % in 2013). At the same time, the spatial scale of simulated dispersal was restricted to approximately 20 km from the source. Model predictions of reef-scale larval retention were highly dependent on biological parameters, underlining the need for further empirical validations of larval traits over a range of species. Overall, our findings present an urgent caution when assuming the potential for self-replenishment in small marine reserves.

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“…Intuitively, the first prediction from theory is that reduced dispersal should be selected for in fragmented landscapes due to the increased costs and risks of moving across fragmented landscapes (Olivieri andGouyon 1997, Travis andDytham 1999), and indeed this is often found in empirical studies. Reduced dispersal propensity and distance moved have been reported when fragmentation increases, due to increased inter-habitat distances or reduced matrix permeability (Dempster 1991, Lens and Dhondt 1994, Diffendorfer et al 1995, Matthysen and Currie 1996, Haddad 1999, Debinski and Holt 2000, Mennechez et al 2003, Schooley and Wiens 2004, Bonte et al 2006, Smith and Batzli 2006, Matter 2006, Cheptou et al 2008, Bowler and Benton 2009, Ahlroth et al 2010, Bergerot et al 2012, Eycott et al 2012, Banks and Lindenmayer 2014.…”

Section: Direct Effects Of Fragmentation Featuresmentioning

confidence: 99%

Evolution of dispersal strategies and dispersal syndromes in fragmented landscapes

et al. 2016

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Habitat fragmentation, an important element of current global change, has profound repercussions on population and species extinction. Landscape fragmentation reduces individual movements between patches (i.e. dispersal) while such movements connecting patches enhance the persistence of metapopulations and metacommunities. Through the recognition of non‐random movements, dispersal has recently been recognized as a highly complex process. This complexity likely changes the predictions on the evolution of dispersal in spatially structured populations and communities. In this article, we emphasize the effects of fragmentation on the evolution of non‐random dispersal. Habitat fragmentation may shape local and global selective pressures acting on a large array of phenotypic traits known to covary with dispersal behaviors. On top of changes in dispersal propensity, habitat fragmentation could therefore modify dispersal syndromes (i.e. dispersers' phenotypic specializations). Habitat fragmentation often leads to spatial structuring of local conditions and consequently may lead to the evolution of different dispersal syndromes at the landscape scale. By neglecting impacts on dispersal syndromes, we might underestimate the impacts of fragmentation on a crucial biodiversity level for metapopulation and metacommunity functioning. We highlight a set of priorities for future empirical and theoretical work that together would provide the understanding of eco‐evolutionary dynamics of dispersal syndromes required for improving our ability to predict and manage spatially structured populations and communities.

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Reduced dispersal propensity in the wingless waterstrider Aquarius najas in a highly fragmented landscape

Cited by 13 publications

References 54 publications

Dispersal capability in a habitat specialist bush cricket: the role of population density and habitat moisture

Dispersal capability in a habitat specialist bush cricket: the role of population density and habitat moisture

Not finding Nemo: limited reef-scale retention in a coral reef fish

Evolution of dispersal strategies and dispersal syndromes in fragmented landscapes

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