195 Works

Data from: Postglacial recolonisation in a cold climate specialist in Western Europe: patterns of genetic diversity in the adder (Vipera berus) support the central-marginal hypothesis

Sylvain Ursenbacher, Michaël Guillon, Hervé Cubizolle, Andréaz Dupoué, Gabriel Blouin-Demers & Olivier Lourdais
Understanding the impact of postglacial recolonization on genetic diversity is essential in explaining current patterns of genetic variation. The central–marginal hypothesis (CMH) predicts a reduction in genetic diversity from the core of the distribution to peripheral populations, as well as reduced connectivity between peripheral populations. While the CMH has received considerable empirical support, its broad applicability is still debated and alternative hypotheses predict different spatial patterns of genetic diversity. Using microsatellite markers, we analysed the...

Data from: The importance of competition for light depends on productivity and disturbance

Yann Hautier, Eva Vojtech & Andy Hector
Eutrophication is a major cause of biodiversity loss. In grasslands this appears to occur due to asymmetric competition for light following the increases in aboveground biomass production. Here, we report the results of an experiment with five grass species that tests how well competitive outcomes can be predicted under a factorial combination of fertilized and disturbed (frequent cutting) conditions. Under fertile conditions our results confirm earlier success in predicting short-term competitive outcomes based on light...

Data from: Indirect genetic effects and sexual conflicts: Partner genotype influences multiple morphological and behavioural reproductive traits in a flatworm

Lucas Marie-Orleach, Nadja Vogt-Burri, Pierick Mouginot, Aline Schlatter, Dita B. Vizoso, Nathan W. Bailey & Lukas Schärer
The expression of an individual's phenotypic traits can be influenced by genes expressed in its social partners. Theoretical models predict that such indirect genetic effects (IGEs) on reproductive traits should play an important role in determining the evolutionary outcome of sexual conflict. However, empirical tests of (i) whether reproductive IGEs exist, (ii) how they vary among genotypes, and (iii) whether they are uniform for different types of reproductive traits are largely lacking. We addressed this...

Data from: High genetic variation in resting stage production in a metapopulation: is there evidence for local adaptation?

Anne Carole Roulin, Mahendra Mariadassou, Matthew D. Hall, Jean-Claude Walser, Christoph Haag & Dieter Ebert
Local adaptation is a key process for the maintenance of genetic diversity and population diversification. A better understanding of the mechanisms that allow (or prevent) local adaptation constitutes a key in apprehending how and at what spatial scale it occurs. The production of resting stages is found in many taxa and reflects an adaptation to outlast adverse environmental conditions. Daphnia magna (Crustacea) can alternate between asexual and sexual reproduction, the latter being linked to dormancy,...

Data from: Diet quality determines interspecific parasite interactions in host populations

Benjamin Lange, Max Reuter, Dieter Ebert, Koenraad Muylaert & Ellen Decaestecker
The widespread occurrence of multiple infections and the often vast range of nutritional resources for their hosts allow that interspecific parasite interactions in natural host populations might be determined by host diet quality. Nevertheless, the role of diet quality with respect to multispecies parasite interactions on host population level is not clear. We here tested the effect of host population diet quality on the parasite community in an experimental study using Daphnia populations. We studied...

Data from: Revisiting the relative growth rate hypothesis for gymnosperm and angiosperm species co‐occurrence

Frida I. Piper, Guenter Hoch & Alex Fajardo
Premise of the study: It is unclear to what extent the co-occurrence of angiosperm and gymnosperm species in some marginal ecosystems is explained by reduced growth in angiosperms due to carbon (C) limitation, and by high stress tolerance in gymnosperms associated with lack of vessels and resource conservation. Methods: We examined growth patterns and traits associated with C balance in four evergreen angiosperm species (including one vesselless species, Drimys winteri) and three gymnosperm tree species...

Data from: Expression of parasite genetic variation changes over the course of infection: implications of within-host dynamics for the evolution of virulence

Melanie Clerc, D. Ebert & M. D. Hall
How infectious disease agents interact with their host changes during the course of infection and can alter the expression of disease-related traits. Yet by measuring parasite life-history traits at one or few moments during infection, studies have overlooked the impact of variable parasite growth trajectories on disease evolution. Here we show that infection-age-specific estimates of host and parasite fitness components can reveal new insight into the evolution of parasites. We do so by characterizing the...

Data from: Managing cryptic biodiversity: Fine-scale intralacustrine speciation along a benthic gradient in Alpine whitefish (Coregonus spp.)

Alan G. Hudson, Baenz Lundsgaard-Hansen, Kay Lucek, Pascal Vonlanthen & Ole Seehausen
Whitefish (Coregonus spp.) are an important catch for many freshwater fisheries, particularly in Switzerland. In support of this, supplemental stocking of whitefish species is carried out, despite lacking complete knowledge of the extent, distribution and origin of whitefish diversity in these lakes, potentially threatening local endemics via artificial gene flow. Here, we investigate phenotypic and genetic differentiation among coexisting whitefish species spawning along a depth gradient in a subalpine Swiss lake to better delineate intralacustrine...

Data from: Adaptive phenotypic plasticity and local adaptation for temperature tolerance in freshwater zooplankton

Lev Y. Yampolsky, Tobias M. M. Schaer & Dieter Ebert
Many organisms have geographical distributions extending from the tropics to near polar regions or can experience up to 30°C temperature variation within the lifespan of an individual. Two forms of evolutionary adaptation to such wide ranges in ambient temperatures are frequently discussed: local adaptation and phenotypic plasticity. The freshwater planktonic crustacean Daphnia magna, whose range extends from South Africa to near arctic sites, shows strong phenotypic and genotypic variation in response to temperature. In this...

Data from: \"Development of the draft genome sequence of the marbled flounder Pseudopleuronectes yokohamae as a reference of population genomic analysis\" in Genomic Resources Notes accepted 1 February 2015 – 31 March 2015

Yuki Minegishi, Minoru Ikeda, Lynda F. Delph, Laura A. Weingartner, Peter D. Fields, Laura Bertini, Carla Caruso, Silvia Proietti, Wolfgang Arthofer, Francesco Cicconardi, Heike Ritthammer, Birgit C. Schlick-Steiner, Florian M. Steiner, Gregor A. Wachter & Herbert C. Wagner
This article documents the public availability of the draft genome sequence data (raw reads, assembled contigs and unassembled reads) and RAD-tag read data of the marbled flounder Pseudopleuronectes yokohamae (Pleuronectiformes; Pleuronectidae).

Drivers and dynamics of a massive adaptive radiation in cichlid fishes

Fabrizia Ronco, Michael Matschiner, Astrid Böhne, Anna Boila, Heinz H. Büscher, Athimed El Taher, Adrian Indermaur, Milan Malinsky, Virginie Ricci, Ansgar Kahmen, Sissel Jentoft & Walter Salzburger
Adaptive radiation is the likely source of much of the ecological and morphological diversity of life. How adaptive radiations proceed and what determines their extent remains elusive in most cases. Here we report the in-depth examination of the spectacular adaptive radiation of cichlid fishes in African Lake Tanganyika. Based on whole-genome phylogenetic analyses, multivariate morphological measurements of three ecologically relevant trait complexes (body shape, upper oral jaw morphology, and lower pharyngeal jaw shape), scoring of...

Secondary contact zones of closely-related Erebia butterflies overlap with narrow phenotypic and parasitic clines

Kay Lucek, Roger Butlin & Theofania Patsiou
Zones of secondary contact between closely related taxa are a common legacy of the Quaternary ice ages. Despite their abundance, the factors that keep species apart and prevent hybridisation are often unknown. Here we study a very narrow contact zone between three closely related butterfly species of the Erebia tyndarus species complex. Using genomic data, we first determined if gene flow occurs and then assessed whether it might be hampered by differences in chromosome number...

Facial attractiveness data

Georgios Kanavakis
Facial appearance expresses numerous cues about physical qualities as well as psychosocial and personality traits. Attractive faces are recognized clearly when seen and are often viewed advantageously in professional, social and romantic relationships. On the other hand, self-perceived attractiveness is not well understood and has been mainly attributed to psychological and cognitive factors. Here we study a large young adult population (n = 601) to assess the effect of facial appearance on self-perceived facial attractiveness.

Stable species boundaries despite ten million years of hybridization in tropical eels

Julia Barth, Chrysoula Gubili, Michael Matschiner, Ole Tørresen, Shun Watanabe, Bernd Egger, Yu-San Han, Eric Feunteun, Ruben Sommaruga, Robert Jehle & Robert Schabetsberger
Genomic evidence is increasingly underpinning that hybridization between taxa is commonplace, challenging our views on the mechanisms that maintain their boundaries. Here, we focus on seven catadromous eel species (genus Anguilla), and use genome-wide sequence data from more than 450 individuals sampled across the tropical Indo-Pacific, morphological information, and three newly assembled draft genomes to compare contemporary patterns of hybridization with signatures of past gene flow across a time-calibrated phylogeny. We show that the seven...

Whole genome resequencing of males and females of three Daphnia magna genotypes

Luca Cornetti
Mechanisms of sex determination (SD) differ widely across the tree of life. In genotypic sex determination (GSD), genetic elements determine whether individuals are male or female, while in environmental sex determination (ESD), external cues control the sex of the offspring. In cyclical parthenogens, females produce mostly asexual daughters, but environmental stimuli such as crowding, temperature or photoperiod may cause them to produce sons. In aphids, sons are induced by ESD, even though GSD is present,...

Data from: Vanishing refuge? Testing the forest refuge hypothesis in coastal East Africa using genome-wide sequence data for seven amphibians

Christopher D. Barratt, Beryl A. Bwong, Robert Jehle, H. Christoph Liedtke, Peter Nagel, Renske E. Onstein, Daniel M. Portik, Jeffrey W. Streicher & Simon P. Loader
High-throughput sequencing data have greatly improved our ability to understand the processes that contribute to current biodiversity patterns. The “vanishing refuge” diversification model is speculated for the coastal forests of eastern Africa, whereby some taxa have persisted and diversified between forest refugia, while others have switched to becoming generalists also present in non-forest habitats. Complex arrangements of geographical barriers (hydrology and topography) and ecological gradients between forest and non-forest habitats may have further influenced the...

Data from: Multiple quantitative trait loci influence intra-specific variation in genital morphology between phylogenetically distinct lines of Drosophila montana

Martin A Schäfer, Jarkko Routtu, Jorge Vieira, Anneli Hoikkala, Mike G Ritchie & Christian Schlötterer
The evolution of animal genitalia has gained renewed interest, because of their potential roles during sexual selection and early stages of species formation. Although central to understanding the evolutionary process, knowledge of the genetic basis of natural variation in genital morphology is limited to a very few species. Using an out-bred cross between phylogenetically distinct lines of Drosophila montana, we characterized quantitative trait loci (QTLs) affecting the size and shape of the distiphallus, a prominent...

Data from: Breeding system, shell size and age at sexual maturity affect sperm length in stylommatophoran gastropods

Dénes Schmera, Julia Pizá, Ellen Reinartz, Sylvain Ursenbacher & Bruno Baur
Background: Sperm size and quality are key factors for fertilization success. There is increasing empirical evidence demonstrating that sperm form and function are influenced by selective pressures. Theoretical models predict that sperm competition could favour the evolution of longer sperm. In hermaphrodites, self-fertilizing species are expected to have shorter sperm than cross-fertilizing species, which use sperm stored from several mating partners for the fertilization of their eggs and thus are exposed to intense sperm competition....

Data from: Paternal signature in kin recognition cues of a social insect: concealed in juveniles, revealed in adults

Janine W. Y. Wong, Joël Meunier, Christophe Lucas, Mathias Kölliker & M. Kolliker
Kin recognition is a key mechanism to direct social behaviours towards related individuals or avoid inbreeding depression. In insects, recognition is generally mediated by cuticular hydrocarbon (CHC) compounds, which are partly inherited from parents. However, in social insects, potential nepotistic conflicts between group members from different patrilines are predicted to select against the expression of patriline-specific signatures in CHC profiles. Whereas this key prediction in the evolution of insect signalling received empirical support in eusocial...

Data from: Community assembly in Lake Tanganyika cichlid fish: quantifying the contributions of both niche-based and neutral processes

Thijs Janzen, Adriana Alzate, Moritz Muschick, Martine E. Maan, Fons Van Der Plas & Rampal S. Etienne
The cichlid family features some of the most spectacular examples of adaptive radiation. Evolutionary studies have highlighted the importance of both trophic adaptation and sexual selection in cichlid speciation. However, it is poorly understood what processes drive the composition and diversity of local cichlid species assemblages on relatively short, ecological timescales. Here, we investigate the relative importance of niche-based and neutral processes in determining the composition and diversity of cichlid communities inhabiting various environmental conditions...

Data from: The first multi-gene phylogeny of the Macrostomorpha sheds light on the evolution of sexual and asexual reproduction in basal Platyhelminthes

Toon Janssen, Dita B. Vizoso, Gregor Schulte, D. Timothy J. Littlewood, Andrea Waeschenbach & Lukas Schärer
The Macrostomorpha—an early branching and species-rich clade of free-living flatworms—is attracting interest because it contains Macrostomum lignano, a versatile model organism increasingly used in evolutionary, developmental, and molecular biology. We elucidate the macrostomorphan molecular phylogeny inferred from both nuclear (18S and 28S rDNA) and mitochondrial (16S rDNA and COI) marker genes from 40 representatives. Although our phylogeny does not recover the Macrostomorpha as a statistically supported monophyletic grouping, it (i) confirms many taxa previously proposed...

Data from: Recombination in the threespine stickleback genome – patterns and consequences

Marius Roesti, Dario Moser & Daniel Berner
Heterogeneity in recombination rate may strongly influence genome evolution and entail methodological challenges in genomic investigations. Nevertheless, a solid understanding of these issues awaits detailed information across a broad range of taxa. Based on 282 F2 individuals and 1,872 single nucleotide polymorphisms, we characterize recombination in the threespine stickleback fish genome. We find an average genome-wide recombination rate of 3.11 cM/Mb. Crossover frequencies are dramatically elevated in the chromosome peripheries as compared to the centers,...

Data from: AFLP markers reveal high clonal diversity and extreme longevity in four arctic-alpine key species

Lucienne C. De Witte, Georg F.J. Armbruster, Ludovic Gielly, Pierre Taberlet & Jürg Stöcklin
We investigated the clonal diversity, genet size structure and genet longevity in populations of four arctic-alpine plants (Carex curvula, Dryas octopetala, Salix herbacea and Vaccinium uliginosum) in order to evaluate their persistence under past climatic oscillations and their potential resistance to future climate change. The size and number of genets was determined with molecular markers (AFLP) using a standardized sampling design in several homogenous climax populations across arctic-alpine regions in Europe. Genet age was estimated...

Data from: Local adaptation of sex-induction in a facultative sexual crustacean: insights from QTL mapping and natural population of Daphnia magna

Anne C. Roulin, Jarko Routtu, Matthew D. Hall, Tim Janicke, Isabelle Colson, Christoph R. Haag, Dieter Ebert & Jarkko Routtu
Dormancy is a common adaptation in invertebrates to survive harsh conditions. Triggered by environmental cues, populations produce resting eggs that allow them to survive temporally unsuitable conditions. Daphnia magna is a crustacean that reproduces by cyclical parthenogenesis, alternating between the production of asexual offspring and the sexual reproduction of diapausing eggs (ephippia). Prior to ephippia production, males (necessary to ensure ephippia fertilization) are produced parthenogenetically. Both the production of ephippia and the parthenogenetic production of...

Data from: Gut microbiota dynamics during dietary shift in Eastern African cichlid fishes

Laura Baldo, Joan Lluís Riera, Ave Tooming-Klunderud, M. Mar Albà & Walter Salzburger
The gut microbiota structure reflects both a host phylogenetic history and a signature of adaptation to the host ecological, mainly trophic niches. African cichlid fishes, with their array of closely related species that underwent a rapid dietary niche radiation, offer a particularly interesting system to explore the relative contribution of these two factors in nature. Here we surveyed the host intra- and interspecific natural variation of the gut microbiota of five cichlid species from the...

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  • University of Basel
  • University of Zurich
  • University of Bern
  • Swiss Federal Institute for Forest, Snow and Landscape Research
  • University of Oslo
  • Uppsala University
  • University of Konstanz
  • Walter and Eliza Hall Institute of Medical Research
  • University of Innsbruck
  • University of Melbourne