The effects of 20 years of highway presence on the genetic structure of Rana dalmatina populations

Lesbarrères, David; Primmer, Craig R.; Lodé, Thierry; Merilä, Juha

doi:10.2980/1195-6860(2006)13[531:teoyoh]2.0.co;2

Cited by 70 publications

(45 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hitchings and Beebee [65] showed lower genetic diversity and twice the differentiation among urban common frog (Rana temporaria) populations compared to populations from rural habitat, despite study sites in the urban setting being in greater proximity. Lesbarrères et al [66] documented profound genetic structuring and significantly lower genetic variation in sub-populations of agile frog (Rana dalmatina) sampled on either side of a highway, compared to populations sampled far from trafficked roads. Large roads have also been identified as effective barriers for common frog (Rana temporaria) dispersal [67] and, similarly, Vos et al [68] showed that roads and railways worked as barriers to gene flow and represented a higher explanatory value to the genetic differentiation between populations of moor frog (Rana arvalis) than geographic distance between populations.…”

Section: Habitat Fragmentationmentioning

confidence: 99%

Global Amphibian Declines, Loss of Genetic Diversity and Fitness: A Review

Allentoft

O’Brien²

2010

Diversity

169

133

View full text Add to dashboard Cite

Abstract:It is well established that a decrease in genetic variation can lead to reduced fitness and lack of adaptability to a changing environment. Amphibians are declining on a global scale, and we present a four-point argument as to why this taxonomic group seems especially prone to such genetic processes. We elaborate on the extent of recent fragmentation of amphibian gene pools and we propose the term dissociated populations to describe the residual population structure. To put their well-documented loss of genetic diversity into context, we provide an overview of 34 studies (covering 17 amphibian species) that address a link between genetic variation and >20 different fitness traits in amphibians. Although not all results are unequivocal, clear genetic-fitness-correlations (GFCs) are documented in the majority of the published investigations. In light of the threats faced by amphibians, it is of particular concern that the negative effects of various pollutants, pathogens and increased UV-B radiation are magnified in individuals with little genetic variability. Indeed, ongoing loss of genetic variation might be an important underlying factor in global amphibian declines.

show abstract

Section: Habitat Fragmentationmentioning

confidence: 99%

Global Amphibian Declines, Loss of Genetic Diversity and Fitness: A Review

Allentoft

O’Brien²

2010

Diversity

169

133

View full text Add to dashboard Cite

show abstract

“…The probability for different European amphibian species of getting killed crossing a road with medium traffic load range from 34 to 61% [70]. Genetic studies on the depleting effects of urbanization and road density on ranid frogs [9,71], or general habitat fragmentation on tree frog populations [8] are examples for developments that might arrive at crested newt populations in Salzburg and Bavaria in the near future.…”

Section: Spatial Patternsmentioning

confidence: 99%

“…As a consequence natural landscapes are fragmented and isolation of local populations in discrete habitat patches increases, while the surrounding areas are unfavourable and dispersal is limited. This issue has become of high importance for conservation biology at large [5,6] and for amphibian conservation in particular [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Conservation Genetics of Crested Newt Species Triturus cristatus and T. carnifex within a Contact Zone in Central Europe: Impact of Interspecific Introgression and Gene Flow

2009

View full text Add to dashboard Cite

Abstract:We have studied the population genetic structure of slightly admixed populations of crested newts (Triturus cristatus and T. carnifex) in a continuously fragmented landscape, located in northern Salzburg (Austria) and neighbouring Bavaria (Germany). Crested newts are listed as Critically Endangered in the provincial Red List of Salzburg and strictly protected by the EU Habitats Directive. We used seven polymorphic microsatellite loci to evaluate genetic diversity and processes that may determine the genetic architecture of populations. Genetic diversity was moderate, pairwise F ST -values were comparatively high showing significant genetic differentiation and limited gene flow. Isolation by distance was significant for the whole data set, but not significant when calculated for T. cristatus-and T. carnifex-like populations separately. Bayesian analyses of population structure, using three different programs showed similar results. Spatial statistics reveal that the geographical isolation of populations is very high.

show abstract

“…Roads may affect wildlife populations through barrier effects, leading to reduction of local genetic diversity and isolating populations (Balkenhol and Waits, 2009;Lesbarrères et al, 2006). Wildlife crossings are one of the measures used to mitigate barrier effects and reduce wildlife road-kill, improving connectivity between habitats fragmented by roads (Beckmann et al, 2010;Corlatti et al, 2009;Lesbarrères and Fahrig, 2012).…”

Section: Introductionmentioning

confidence: 99%

Habitat or matrix: which is more relevant to predict road-kill of vertebrates?

2015

View full text Add to dashboard Cite

We believe that in tropics we need a community approach to evaluate road impacts on wildlife, and thus, suggest mitigation measures for groups of species instead a focal-species approach. Understanding which landscape characteristics indicate road-kill events may also provide models that can be applied in other regions. We intend to evaluate if habitat or matrix is more relevant to predict road-kill events for a group of species. Our hypothesis is: more permeable matrix is the most relevant factor to explain road-kill events. To test this hypothesis, we chose vertebrates as the studied assemblage and a highway crossing in an Atlantic Forest region in southeastern Brazil as the study site. Logistic regression models were designed using presence/absence of road-kill events as dependent variables and landscape characteristics as independent variables, which were selected by Akaike's Information Criterion. We considered a set of candidate models containing four types of simple regression models: Habitat effect model; Matrix types effect models; Highway effect model; and, Reference models (intercept and buffer distance). Almost three hundred road-kills and 70 species were recorded. River proximity and herbaceous vegetation cover, both matrix effect models, were associated to most road-killed vertebrate groups. Matrix was more relevant than habitat to predict road-kill of vertebrates. The association between river proximity and road-kill indicates that rivers may be a preferential route for most species. We discuss multi-species mitigation measures and implications to movement ecology and conservation strategies.Keywords: connectivity, conservation, landscape ecology, rivers, road ecology.Habitat ou matriz: qual é mais relevante para prever atropelamentos de vertebrados? ResumoNós acreditamos que nos trópicos, precisamos de uma abordagem de comunidade para avaliar os impactos das estradas sobre a vida silvestre, e então, sugerir medidas de mitigação para grupos de espécies ao invés da abordagem de espécie-foco. Compreender quais características da paisagem indicam eventos de atropelamento podem também fornecer modelos que podem ser aplicados em outras regiões. Nós pretendemos avaliar se habitat ou matriz é mais relevante para prever eventos de atropelamento para grupos de espécies. Nossa hipótese é: matriz mais permeável é o fator mais relevante para explicar os eventos de atropelamentos. Para testar essa hipótese, escolhemos vertebrados como a assembléia estudada e uma rodovia cruzando uma região de Mata Atlântica no sudeste do Brasil como área de estudo. Modelos de regressão logística foram criados usando presença/ausência de eventos de atropelamentos como variáveis dependentes e características da paisagem como variáveis independentes, os quais foram selecionados pelo Critério de Informação de Akaike. Nós consideramos um conjunto de modelos candidatos contendo quatro tipos de modelos de regressão simples: modelo de efeito de habitat; modelos de efeito de tipos de matriz; modelo de efeito da rodovia; e, mode...

show abstract

The effects of 20 years of highway presence on the genetic structure of Rana dalmatina populations

Cited by 70 publications

References 3 publications

Global Amphibian Declines, Loss of Genetic Diversity and Fitness: A Review

Global Amphibian Declines, Loss of Genetic Diversity and Fitness: A Review

Conservation Genetics of Crested Newt Species Triturus cristatus and T. carnifex within a Contact Zone in Central Europe: Impact of Interspecific Introgression and Gene Flow

Habitat or matrix: which is more relevant to predict road-kill of vertebrates?

Contact Info

Product

Resources

About