49 Works

Data from: Phylogeography of Silver Pheasant (Lophura nycthemera L.) across China: aggregate effects of refugia, introgression and riverine barriers

Lu Dong, Gerald Heckel, Wei Liang & Yanyun Zhang
The role of Pleistocene glacial cycles in forming the contemporary genetic structure of organisms has been well studied in China with a particular focus on the Tibetan Plateau. However, China has a complex topography and diversity of local climates, and how glacial cycles may have shaped the subtropical and tropical biota of the region remains mostly unaddressed. To investigate the factors that affected the phylogeography and population history of a widely distributed and nondeciduous forest...

Data from: Natural selection in a post-glacial range expansion: the case of the colour cline in the European barn owl

Sylvain Antoniazza, Ricardo Kanitz, Samuel Neuenschwander, Reto Burri, Arnaud Gaigher, Alexandre Roulin & Jérôme Goudet
Gradients of variation – or clines – have always intrigued biologists. Classically, they have been interpreted as the outcomes of antagonistic interactions between selection and gene flow. Alternatively, clines may also establish neutrally with isolation-by-distance or secondary contact between previously isolated populations. The relative importance of natural selection and these two neutral processes in the establishment of clinal variation can be tested by comparing genetic differentiation at neutral genetic markers and at the studied trait....

Data from: Species divergence and maintenance of species cohesion of three closely related Primula species in the Qinghai-Tibet Plateau

Guangpeng Ren, Rubén G. Mateo, Antoine Guisan, Elena Conti & Nicolas Salamin
Aim: Understanding the relative roles of geography and ecology in driving speciation, population divergence and maintenance of species cohesion is of great interest to molecular ecology. Closely related species that are parapatrically distributed in mountainous areas provide an ideal model to evaluate these key issues, especially when genomic data are analyzed within a spatially and ecologically explicit context. Here we used three closely related species of Primula that occur in the Himalayas, the Hengduan Mountains...

Data from: A dedicated target capture approach reveals variable genetic markers across micro- and macro-evolutionary time scales in palms

Marylaure De La Harpe, Jaqueline Hess, Oriane Loiseau, Nicolas Salamin, Christian Lexer & Margot Paris
Understanding the genetics of biological diversification across micro- and macro-evolutionary time scales is a vibrant field of research for molecular ecologists as rapid advances in sequencing technologies promise to overcome former limitations. In palms, an emblematic, economically and ecologically important plant family with high diversity in the tropics, studies of diversification at the population and species levels are still hampered by a lack of genomic markers suitable for the genotyping of large numbers of recently...

Data from: Demographic modelling with whole-genome data reveals parallel origin of similar Pundamilia cichlid species after hybridization

Joana I. Meier, Vitor C. Sousa, David Alexander Marques, Oliver M. Selz, Catherine E. Wagner, Laurent Excoffier & Ole Seehausen
Modes and mechanisms of speciation are best studied in young species pairs. In older taxa, it is increasingly difficult to distinguish what happened during speciation from what happened after speciation. Lake Victoria cichlids in the genus Pundamilia encompass a complex of young species and polymorphic populations. One Pundamilia species pair, P. pundamilia and P. nyererei, is particularly well suited to study speciation because sympatric population pairs occur with different levels of phenotypic differentiation and reproductive...

Data from: Genomics of parallel ecological speciation in Lake Victoria cichlids

Joana Isabel Meier, David Alexander Marques, Catherine Elise Wagner, Laurent Excoffier & Ole Seehausen
The genetic basis of parallel evolution of similar species is of great interest in evolutionary biology. In the adaptive radiation of Lake Victoria cichlid fishes, sister species with either blue or red-back male nuptial coloration have evolved repeatedly, often associated with shallower and deeper water, respectively. One such case are blue and red-backed Pundamilia species, for which we recently showed that a young species pair may have evolved through “hybrid parallel speciation”. Coalescent simulations suggested...

Data from: Phylogenetic plant community structure along elevation is lineage specific

Charlotte Ndiribe, Loïc Pellissier, Silvia Antonelli, Anne Dubuis, Julien Pottier, Pascal Vittoz, Antoine Guisan & Nicolas Salamin
The trend of closely related taxa to retain similar environmental preferences mediated by inherited traits suggests that several patterns observed at the community scale originate from longer evolutionary processes. While the effects of phylogenetic relatedness have been previously studied within a single genus or family, lineage-specific effects on the ecological processes governing community assembly have rarely been studied for entire communities or flora. Here, we measured how community phylogenetic structure varies across a wide elevation...

Data from: Scale-dependent adaptive evolution and morphological convergence to climatic niche in Californian eriogonoids (Polygonaceae)

Anna Kostikova, Nicolas Salamin, Peter B. Pearman, Glenn Litsios, Sarah Burgy & Laura Milani
Aim: Macroevolutionary patterns and processes change substantially depending on levels of taxonomic and ecological organization, and the resolution of environmental and spatial variability. In comparative methods, the resolution of environmental and spatial variability often defines the number of selective regimes used to test whether phenotypic characteristics are adaptively correlated with the environment. Here, we examine how investigator choice of the number of selective regimes, determined by varying the resolution of among-species variability in the species...

Data from: Phylogenetic conservatism in plant phenology

T. Jonathan Davies, Elizabeth M. Wolkovich, Nathan J. B. Kraft, Nicolas Salamin, Jenica M. Allen, Toby R. Ault, Julio L. Betancourt, Kjell Bolmgren, Elsa E. Cleland, Benjamin I. Cook, Theresa M. Crimmins, Susan J. Mazer, Gregory J. McCabe, Stephanie Pau, Jim Regetz, Mark D. Schwartz & Steven E. Travers
Phenological events – defined points in the life cycle of a plant or animal – have been regarded as highly plastic traits, reflecting flexible responses to various environmental cues. The ability of a species to track, via shifts in phenological events, the abiotic environment through time might dictate its vulnerability to future climate change. Understanding the predictors and drivers of phenological change is therefore critical. Here, we evaluated evidence for phylogenetic conservatism – the tendency...

Data from: Divergent evolutionary processes associated with colonization of offshore islands

Natália Martínková, Ross Barnett, Thomas Cucchi, Rahel Struchen, Marine Pascal, Michel Pascal, Martin C. Fischer, Thomas Higham, Selina Brace, Simon Y. W. Ho, Jean-Pierre Quéré, Paul O'Higgins, Laurent Excoffier, Gerald Heckel, A. Rus Hoelzel, Keith M. Dobney & Jeremy B. Searle
Oceanic islands have been a test ground for evolutionary theory, but here, we focus on the possibilities for evolutionary study created by offshore islands. These can be colonized through various means and by a wide range of species, including those with low dispersal capabilities. We use morphology, modern and ancient sequences of cytochrome b (cytb) and microsatellite genotypes to examine colonization history and evolutionary change associated with occupation of the Orkney archipelago by the common...

Data from: Spatiotemporal dynamics of Puumala hantavirus associated with its rodent host, Myodes glareolus

Vanessa Weber De Melo, Hanan Sheik Ali, Jona Freise, Denise Kühnert, Sandra Essbauer, Marc Mertens, Konrad M. Wanka, Stephan Drewes, Rainer G. Ulrich, Gerald Heckel & Hanan Sheikh Ali
Many viruses significantly impact human and animal health. Understanding the population dynamics of these viruses and their hosts can provide important insights for epidemiology and virus evolution. Puumala virus (PUUV) is a European hantavirus that may cause regional outbreaks of hemorrhagic fever with renal syndrome in humans. Here, we analyzed the spatiotemporal dynamics of PUUV circulating in local populations of its rodent reservoir host, the bank vole (Myodes glareolus) during eight years. Phylogenetic and population...

Data from: The population genomics of rapid adaptation: disentangling signatures of selection and demography in white sands lizards

Stefan Laurent, Susanne P. Pfeifer, Matthew Settles, Samuel S. Hunter, Kayla M. Hardwick, Louise Ormond, Vitor C. Sousa, Jeffrey D. Jensen, Erica Bree Rosenblum & Matthew L. Settles
Understanding the process of adaptation during rapid environmental change remains one of the central focal points of evolutionary biology. The recently formed White Sands system of southern New Mexico offers an outstanding example of rapid adaptation, with a variety of species having rapidly evolved blanched forms on the dunes that contrast with their close relatives in the surrounding dark soil habitat. In this study, we focus on two of the White Sands lizard species, Sceloporus...

Data from: Genomics of the divergence continuum in an African plant biodiversity hotspot, I: drivers of population divergence in Restio capensis (Restionaceae)

Christian Lexer, Rafael O. Wüest, Sofia Mangili, Myriam Heuertz, Kai N. Stolting, Peter B. Pearman, Felix Forest, Nicolas Salamin, Niklaus E. Zimmermann & Eligio Bossolini
Understanding the drivers of population divergence, speciation and species persistence is of great interest to molecular ecology, especially for species-rich radiations inhabiting the world’s biodiversity hotspots. The toolbox of population genomics holds great promise for addressing these key issues, especially if genomic data are analyzed within a spatially and ecologically explicit context. We have studied the earliest stages of the divergence continuum in the Restionaceae, a species-rich and ecologically important plant family of the Cape...

Data from: Adaptive, convergent origins of the pygmy phenotype in African rainforest hunter-gatherers

George H. Perry, Matthieu Foll, Jean-Christophe Grenier, Etienne Patin, Yohann Nédélec, Alain Pacis, Maxime Barakatt, Simon Gravel, Xiang Zhou, Sam L. Nsobya, Laurent Excoffier, Lluis Quintana-Murci, Nathaniel J. Dominy & Luis B. Barreiro
The evolutionary history of the human pygmy phenotype (small body size), a characteristic of African and Southeast Asian rainforest hunter-gatherers, is largely unknown. Here we use a genome-wide admixture mapping analysis to identify 16 genomic regions that are significantly associated with the pygmy phenotype in the Batwa, a rainforest hunter-gatherer population from Uganda (east central Africa). The identified genomic regions have multiple attributes that provide supporting evidence of genuine association with the pygmy phenotype, including...

Data from: Phylogeographic past and invasive presence of Arion pest slugs in Europe

Miriam A. Zemanova, Eva Knop & Gerald Heckel
Arion vulgaris (syn. A. lusitanicus) is the most destructive pest slug in Europe. The species has been regarded a classic case of an ongoing biological invasion with negative economic and ecological impact in many European countries, but this status has recently been contested. In this study, we assessed mitochondrial and autosomal genetic diversity in populations of A. vulgaris across the entire distribution range in order to characterize its evolutionary history. Mitochondrial diversity in A. vulgaris...

Data from: Inferring the age of a fixed beneficial allele

Louise Ormond, Matthieu Foll, Gregory B. Ewing, Susanne P. Pfeifer & Jeffrey D. Jensen
Estimating the age and strength of beneficial alleles is central to understanding how adaptation proceeds in response to changing environmental conditions. Several haplotype-based estimators exist for inferring the age of segregating beneficial mutations. Here, we develop an approximate Bayesian based approach that rather estimates these parameters for fixed beneficial mutations in single populations. We integrate a range of existing diversity, site frequency spectrum, haplotype and linkage disequilibrium based summary statistics. We show that for strong...

Data from: Cryptic lineages of a common alpine mayfly show strong life-history divergence

Marie Leys, Irene Keller, Christopher T. Robinson & Katja Räsänen
Understanding ecological divergence of morphologically similar but genetically distinct species – previously considered as a single morphospecies – is of key importance in evolutionary ecology and conservation biology. Despite their morphological similarity, cryptic species may have evolved distinct adaptations. If such ecological divergence is unaccounted for, any predictions about their responses to environmental change and biodiversity loss may be biased. We used spatio-temporally replicated field surveys of larval cohort structure and population genetic analyses (using...

Data from: Phylodynamic model adequacy using posterior predictive simulations

Sebastian Duchene, Remco Bouckaert, David A Duchene, Tanja Stadler & Alexei J Drummond
Rapidly evolving pathogens, such as viruses and bacteria, accumulate genetic change at a similar timescale over which their epidemiological processes occur, such that it is possible to make inferences about their infectious spread using phylogenetic time-trees. For this purpose it is necessary to choose a phylodynamic model. However, the resulting inferences are contingent on whether the model adequately describes key features of the data. Model adequacy methods allow formal rejection of a model if it...

Data from: Fundamental and realized feeding niche breadths of sexual and asexual stick insects

Chloé Larose, Darren J. Parker & Tanja Schwander
The factors contributing to the maintenance of sex over asexuality in natural populations remain unclear. Ecological divergences between sexual and asexual lineages could help to maintain reproductive polymorphisms, at least transiently, but the consequences of asexuality for the evolution of ecological niches are unknown. Here, we investigated how niche breadths change in transitions from sexual reproduction to asexuality. We used host plant ranges as a proxy to compare the realized feeding niche breadths of five...

Data from: Extensive variation at MHC DRB in the New Zealand sea lion (Phocarctos hookeri) provides evidence for balancing selection

Amy J. Osborne, Monika Zavodna, B. L. Chilvers, Bruce C. Robertson, Sandra S. Negro, Martin A. Kennedy & Neil J. Gemmell
Marine mammals are often reported to possess reduced variation of major histocompatibility complex (MHC) genes compared with their terrestrial counterparts. We evaluated diversity at two MHC class II B genes, DQB and DRB, in the New Zealand sea lion (Phocarctos hookeri, NZSL) a species that has suffered high mortality owing to bacterial epizootics, using Sanger sequencing and haplotype reconstruction, together with next-generation sequencing. Despite this species’ prolonged history of small population size and highly restricted...

Data from: Automated quantitative histology reveals vascular morphodynamics during Arabidopsis hypocotyl secondary growth

Martial Sankar, Kaisa Nieminen, Laura Ragni, Ioannis Xenarios & Christian S. Hardtke
Among various advantages, their small size makes model organisms preferred subjects of investigation. Yet, even in model systems detailed analysis of numerous developmental processes at cellular level is severely hampered by their scale. For instance, secondary growth of Arabidopsis hypocotyls creates a radial pattern of highly specialized tissues that comprises several thousand cells starting from a few dozen. This dynamic process is difficult to follow because of its scale and because it can only be...

Data from: Phylogeography and support vector machine classification of colour variation in panther chameleons

Djordje Grbic, Suzanne V. Saenko, Toky M. Randriamoria, Adrien Debry, Achille P. Raselimanana & Michel C. Milinkovitch
Lizards and snakes exhibit colour variation of adaptive value for thermoregulation, camouflage, predator avoidance, sexual selection and speciation. Furcifer pardalis, the panther chameleon, is one of the most spectacular reptilian endemic species in Madagascar, with pronounced sexual dimorphism and exceptionally large intraspecific variation in male coloration. We perform here an integrative analysis of molecular phylogeography and colour variation after collecting high-resolution colour photographs and blood samples from 324 F. pardalis individuals in locations spanning the...

Data from: De novo assembly and comparative analysis of the Ceratodon purpureus transcriptome

Péter Szövényi, Pierre-François Perroud, Aikaterini Symeonidi, Sean Stevenson, Ralph S. Quatrano, Stefan A. Rensing, Andrew C. Cuming & Stuart F. McDaniel
The bryophytes are a morphologically and ecologically diverse group of plants that have recently emerged as major model systems for a variety of biological processes. In particular, the genome sequence of the moss, Physcomitrella patens, has significantly enhanced our understanding of the evolution of developmental processes in land plants. However, to fully explore the diversity within bryophytes, we need additional genomic resources. Here we describe analyses of the transcriptomes of a male and a female...

Data from: The consequences of not accounting for background selection in demographic inference

Gregory B. Ewing & Jeffrey D. Jensen
Recently, there has been increased awareness of the role of background selection (BGS) in both data analysis and modelling advances. However, BGS is still difficult to take into account because of tractability issues with simulations and difficulty with nonequilibrium demographic models. Often, simple rescaling adjustments of effective population size are used. However, there has been neither a proper characterization of how BGS could bias or shift inference when not properly taken into account, nor a...

Data from: Resprouter fraction in Cape Restionaceae assemblages varies with climate and soil type

Rafael O. Wüest, Glenn Litsios, Félix Forest, Christian Lexer, H. Peter Linder, Nicolas Salamin, Niklaus E. Zimmermann & Peter B. Pearman
While fire-induced changes in biodiversity are well documented, less is known about how fire impacts life-history variation and diversity of functional traits that represent distinct strategies for persistence in fire-driven ecosystems. One example is the dichotomy in which ‘resprouter’ species usually survive fires to produce new growth, while ‘reseeder’ species perish and re-establish from seed. Variable relative numbers of reseeder and resprouter species in local assemblages of Restionaceae (Poales) of the Cape Floristic Region (CFR),...

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