Landscape genetics of Physalaemus cuvieri in Brazilian Cerrado: Correspondence between population structure and patterns of human occupation and habitat loss

Telles, Mariana Pires de Campos; Diniz‐Filho, José Alexandre Felizola; Bastos, Rogério Pereira; Soares, Thannya Nascimento; Guimarães, Lorena Dall’Ara; Lima, L. P. nna D. C. rvalho

doi:10.1016/j.biocon.2007.06.003

Cited by 46 publications

(26 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Likewise, recent logging accounted for higher genetic differentiation and lower genetic diversity in populations of giant salamander (Dicamptodon tenebrosus) [70]. Although associations of recent habitat fragmentation and genetic variation in amphibian gene pools have been most intensively examined in Europe and North America, the trend is by no means unique to the northern hemisphere (e.g., [71][72][73][74]). …”

Section: Habitat Fragmentationmentioning

confidence: 93%

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

Allentoft

O’Brien²

2010

Diversity

167

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: 93%

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

Allentoft

O’Brien²

2010

Diversity

167

133

View full text Add to dashboard Cite

show abstract

“…This is probably not because there are no species of vipers at risk or vulnerable to extinction, but due to the lack of studies concerning native species of the Brazilian Cerrado. At the same time, the genetic analysis of some relatively abundant species, such as the "caissaca" (Bothrops moojeni), may be useful in understanding the effects of habitat fragmentation and habitat loss in the Cerrado, even though the persistence of such species may not be directly affected by these effects (Telles et al, 2007).…”

Section: Large Populations Have a Greater Genetic Variation And A Decmentioning

confidence: 99%

Genetic diversity in populations of the viper Bothrops moojeni Hoge, 1966 in Central Brazil using RAPD markers

Dutra¹,

Telles²,

Dutra³

et al. 2008

Genet. Mol. Res.

View full text Add to dashboard Cite

ABSTRACT.Bothrops moojeni is an abundant venomous snake responsible for most of the snakebite cases in the Central region of Brazil and as a result of the anthropogenic habitat disturbance, such as the increase in extensive farming, the range of B. moojeni has been greatly fragmented. Here, we obtained genomic DNA from a total of 75 snakes belonging to four populations. Genetic variability evaluated for five RAPD primers was low (He = 0.20) and was not spatially structured. We found evidence of significant genetic divergence among B. moojeni populations that were isolated (Φ ST values of 0.21 and 0.25), while populations more proximal exhibited less divergence (Φ ST values of 0.04 and 0.08). We found only moderate divergence (Φ ST value of 0.12) between two populations greatly isolated (851.83 km apart) along with great differentiation (0.24) between two proximal populations (290 km apart). Even though these populations are close to each other, they occur in an urbanized area that is almost completely covered by extensive crops, representing an obstruc- tion to the mobility of this viper. Molecular variance analysis (AMOVA) showed some degree of subdivision in these populations, with a Φ ST value of 0.16, significant to the level of 1% by 1000 random permutations. We also performed a Bayesian analysis that confirmed the AMOVA results and found a value of θ B = 0.14 and an ƒ = 0.27, suggesting a high level of endogamy. This is the first study that characterizes genetic variability for this important species of the Bothrops genus, and our data are of significant importance in terms of classifying populations in relation to their conservational value and management strategies. Thus, given the high levels of population structure found in this case, we recommend sampling as many populations as possible to maximize the genetic variability to be preserved when aiming for in situ conservation. The same should be done to perform samplings toward ex situ conservation.

show abstract

“…In fact, the monotonic relationship between genetic divergence and geographical distances expected under a pure IBD process, for example, should be viewed as a null model for complex landscape effects. Deviations from this null expectation imply that other forces can be involved in genetic differentiation (Broquet et al, 2006;Telles et al, 2007).…”

Section: Geographical and Landscape Geneticsmentioning

confidence: 96%

Mapping the evolutionary twilight zone: molecular markers, populations and geography

Diniz‐Filho

Telles

Bonatto

et al. 2008

Journal of Biogeography

Self Cite

View full text Add to dashboard Cite

Since evolutionary processes, such as dispersal, adaptation and drift, occur in a geographical context, at multiple hierarchical levels, biogeography provides a central and important unifying framework for understanding the patterns of distribution of life on Earth. However, the advent of molecular markers has allowed a clearer evaluation of the relationships between microevolutionary processes and patterns of genetic divergence among populations in geographical space, triggering the rapid development of many research programmes. Here we provide an overview of the interpretation of patterns of genetic diversity in geographical and ecological space, using both implicit and explicit spatial approaches. We discuss the actual or potential interaction of phylogeography, molecular ecology, ecological genetics, geographical genetics, landscape genetics and conservation genetics with biogeography, identifying their respective roles and their ability to deal with ecological and evolutionary processes at different levels of the biological hierarchy. We also discuss how each of these research programmes can improve strategies for biodiversity conservation. A unification of these research programmes is needed to better achieve their goals, and to do this it is important to develop cross‐disciplinary communication and collaborations among geneticists, ecologists, biogeographers and spatial statisticians.

show abstract

Landscape genetics of Physalaemus cuvieri in Brazilian Cerrado: Correspondence between population structure and patterns of human occupation and habitat loss

Cited by 46 publications

References 59 publications

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

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

Genetic diversity in populations of the viper Bothrops moojeni Hoge, 1966 in Central Brazil using RAPD markers

Mapping the evolutionary twilight zone: molecular markers, populations and geography

Contact Info

Product

Resources

About