21 Works

Focused Ion Beam tomography on fossilized osteocytes

Yara Haridy, Markus Osenberg, André Hilger, Ingo Manke, Donald Davesne & Florian Witzmann
Osteocytes play a central role in bone metabolism in extant vertebrates, but their evolutionary history is poorly understood. Therefore osteocyte lacunae microstructure of fossil bone was studied on the nanometer scale by means of focused ion beam tomography (FIB). A osteostracan and a “placoderm” were imaged, the earliest groups with cellular bone, and secondary osteons respectively. To visualize and characterize the early bone composition via the morphology and distribution of osteocyte lacunae, thereby imaging the...

Uncovering the effects of Müllerian mimicry on the evolution of conspicuousness in colour patterns

Ombeline Sculfort, Ludovic Maisonneuve, Marianne Elias, Thomas G. Aubier & Violaine Llaurens
Variation in the conspicuousness of colour patterns is observed within and among defended prey species. The evolution of conspicuous colour pattern in defended species can be strongly impaired because of increased detectability by predators. Nevertheless, such evolution of the colour pattern can be favoured if changes in conspicuousness result in Müllerian mimicry with other defended prey. Here, we develop a model describing the population dynamics of a conspicuous defended prey species, and we assess the...

PCA coordinates describing dorsal colour pattern variation in 723 Morpho butterflies

Violaine Llaurens, Yann Le Poul, Agathe Puissant, Patrick Blandin & Vincent Debat
Species interactions such as mimicry can promote trait convergence but disentangling this effect from those of shared ecology, evolutionary history and niche conservatism is often challenging. Here by focusing on wing color pattern variation within and between three butterfly species living in sympatry in a large proportion of their range, we tested the effect of species interactions on trait diversification. These butterflies display a conspicuous iridescent blue coloration on the dorsal side of their wings...

Phenological data for the article: Phenotypic plasticity drives phenological changes in a Mediterranean blue tit population

Juliette Biquet, Suzanne Bonamour, Pierre De Villemereuil, Christophe De Franceschi & Céline Teplitsky
Earlier phenology induced by climate change, such as the passerines' breeding time, is observed in many natural populations. Understanding the nature of such changes is key to predict the responses of wild populations to climate change. Genetic changes have been rarely investigated for laying date, though it has been shown to be heritable and under directional selection, suggesting that the trait could evolve. In a Corsican blue tit population, the birds' laying date has significantly...

Data from: How do predators generalize warning signals in simple and complex prey communities? Insights from a videogame

Monica Arias, John W. Davey, Simon Martin, Chris Jiggins, Nicola Nadeau, Mathieu Joron & Violaine Llaurens
The persistence of distinct warning signals within and between sympatric mimetic communities is a puzzling evolutionary question because selection favours convergence of colour patterns among toxic species. Such convergence is partly shaped by predators’ reaction to similar but not identical stimulus, i.e. generalization behaviour. And generalisation by predators is likely to be shaped by the diversity of local prey. However, studying generalization behaviour is generally limited to simple variations of prey colour patterns. Here, we...

Biogeographic diversification of Eranthis (Ranunculaceae) reflects the geological history of the three great Asian plateaus

Kun-Li Xiang, Andrey S. Erst, Jian Yang, Huan-Wen Peng, Rosa Del C. Ortiz, Florian Jabbour, Tatyana V. Erst & Wei Wang
The evolutionary history of organisms with poor dispersal abilities usually parallels geological events. Collisions of the Indian and Arabian plates with Eurasia greatly changed Asian topography and affected regional and global climate as well as biotic evolution. However, the geological evolution of Asia related to these two collisions remains debated. Here, we used Eranthis, an angiosperm genus with poor seed dispersal ability and a discontinuous distribution across Eurasia , to shed light on the orogenesis...

Data from: Coalescence times, life history traits and conservation concerns: an example from four coastal shark species from the Indo-Pacific

Pierre Lesturgie, Serge Planes & Stefano Mona
Dispersal abilities play a crucial role in shaping the extent of population genetic structure, with more mobile species being panmictic over large geographic ranges and less mobile ones organized in meta-populations exchanging migrants to different degrees. In turn, population structure directly influences the coalescence pattern of the sampled lineages, but the consequences on the estimated variation of the effective population size (Ne) over time obtained by means of unstructureddemographic models remain poorly understood. However, this...

Immigration dynamics of tropical and subtropical Southeast Asian limestone karst floras

Xiao-Qian Li, Xiao-Guo Xiang, Qiang Zhang, Florian Jabbour, Rosa Del C. Ortiz, Andrey S. Erst, Zhen-Yu Li & Wei Wang
Ex situ origins and dispersal of taxa have played important roles in the assembly of island-like biodiversity hotspots. Insular limestone karsts in Southeast Asia are hotspots of biodiversity and endemism, but the immigration processes of their unique floras are still poorly known. Here, we used Gesneriaceae as a proxy to investigate immigration dynamics of tropical and subtropical Southeast Asian karst floras. We show that immigration into subtropical Southeast Asian karst floras first occurred in the...

Data from: Does divergent selection predict the evolution of mate preference and reproductive isolation in the tropical butterfly genus Melinaea (Nymphalidae: Ithomiini)?

Melanie McClure, Louiza Mahrouche, Céline Houssin, Monica Monllor, Yann Le Poul, Brigitte Frérot, Alexandra Furtos & Marianne Elias
Many studies have shown that speciation can be facilitated when a trait under divergent selection also causes assortative mating. In Müllerian mimetic butterflies, a change in wing colour pattern can cause reproductive isolation. However, colour pattern divergence does not always lead to reproductive isolation. Understanding how divergent selection affects speciation requires identifying the mechanisms that promote mate preference and/or choosiness. This study addresses whether shifts in wing colour pattern drives mate preference and reproductive isolation...

Data from: Why has transparency evolved in aposematic butterflies? insights from the largest radiation of aposematic butterflies, the Ithomiini

Melanie McClure, Corentin Clerc, Charlotte Desbois, Aimilia Meichanetzoglou, Marion Cau, Lucie Bastin-Héline, Javier Bacigalupo, Céline Houssin, Charline Pinna, Bastien Nay, Violaine Llaurens, Serge Berthier, Christine Andraud, Doris Gomez & Marianne Elias
Defended species are often conspicuous and this is thought to be an honest signal of defences, i.e. more toxic prey are more conspicuous. Neotropical butterflies of the large Ithomiini tribe numerically dominate communities of chemically-defended butterflies and may thus drive the evolution of mimetic warning patterns. Although many species are brightly coloured, most are transparent to some degree. The evolution of transparency from a warningly coloured ancestor is puzzling as it is generally assumed to...

Data from: Delimiting species of marine gastropods (Turridae, Conoidea) using RAD-sequencing in an integrative taxonomy framework

Jawad Abdelkrim, Laetitia Aznar-Cormano, Barbara Buge, Alexander Fedosov, Yuri Kantor, Paul Zaharias & Nicolas Puillandre
Species delimitation in poorly-known and diverse taxa is usually performed based on monolocus, DNA barcoding-like approaches, while multilocus data are often used to test alternative species hypotheses in well-studied groups. We combined both approaches to delimit species in the Xenuroturris / Iotyrris complex, a group of venomous marine gastropods from the Indo-Pacific. First, COI sequences were analyzed using three methods of species delimitation, ABGD, PTP and GMYC to propose primary species hypotheses (PSH). Second, RAD-seq...

Data from: Habitat diversity associated with island size and environmental filtering control the species richness of rock-savanna plants in neotropical inselbergs

Ludovic Henneron, Corinne Sarthou, Jean-Christophe De Massary & Jean-François Ponge
Disentangling the multiple factors controlling species diversity is a major challenge in ecology. Island biogeography and environmental filtering are two influential theories emphasizing respectively island size and isolation, and the abiotic environment, as key drivers of species richness. However, few attempts have been made to quantify their relative importance and investigate their mechanistic basis. Here, we applied structural equation modelling, a powerful method allowing test of complex hypotheses involving multiple and indirect effects, on an...

Data from: Cryptic differences in colour among Müllerian mimics: how can the visual capacities of predators and prey shape the evolution of wing colours?

Violaine Llaurens, Mathieu Joron & Marc Théry
Antagonistic interactions between predators and prey often lead to co-evolution. In the case of toxic prey, aposematic colours act as warning signals for predators and play a protective role. Evolutionary convergence in colour patterns among toxic prey evolves due to positive density-dependent selection and the benefits of mutual resemblance in spreading the mortality cost of educating predators over a larger prey assemblage. Comimetic species evolve highly similar colour patterns, but such convergence may interfere with...

Hard to catch: experimental evidence supports evasive mimicry

Erika Páez V, Janne K. Valkonnen, Keith R. Willmott, Pável Matos-Maraví, Marianne Elias & Johanna Mappes
Most research on aposematism has focused on chemically defended prey, but the signaling difficulty of capture remains poorly explored. Similar to classical Batesian and Müllerian mimicry related to distastefulness, such ‘evasive aposematism' may also lead to convergence in warning colours, known as evasive mimicry. A prime candidate group for evasive mimicry areAdelphabutterflies, which are agile insects and show remarkable colour pattern convergence. We tested the ability of naive blue tits to learn to avoid and...

Drosophila glue protects from predation

Virginie Courtier-Orgogozo, Flora Borne, Stéphane Prigent & Mathieu Molet
Animals can be permanently attached to a substrate in aerial environments at certain stages of their development. Pupa adhesion has evolved multiple times in insects and is thought to maintain the animal in a place where it is not detectable by predators. Here, we investigate whether pupa adhesion in Drosophila can also protect the animal by preventing potential predators from detaching the pupa. We measured the adhesion of Drosophila species sampled from the same area...

Data from: Macroevolutionary analyses suggest that environmental factors, not venom apparatus, play key role in Terebridae marine snail diversification

Maria Vittoria Modica, Juliette Gorson, Alexander E. Fedosov, Gavin Malcolm, Yyves Terryn, Nicolas Puillandre & Mandë Holford
How species diversification occurs remains an unanswered question in predatory marine invertebrates, such as sea snails of the family Terebridae. However, the anatomical disparity found throughput the Terebridae provides a unique perspective for investigating diversification patterns in venomous predators. In this study, a new dated molecular phylogeny of the Terebridae is used as a framework for investigating diversification of the family through time, and for testing the putative role of intrinsic and extrinsic traits, such...

Adaptive evolution of flight in Morpho butterflies

Camille Le Roy, Dario Amadori, Samuel Charberet, Jaap Windt, Florian Muijres, Violaine Llaurens & Vincent Debat
The diversity of flying animals suggests that countless combinations of flight morphologies and behaviors have evolved with specific lifestyles, thereby exploiting diverse aerodynamic mechanisms. How morphology, flight behavior and aerodynamic properties together diversify with contrasting ecology remains to be elucidated. We studied the adaptive co-divergence in wing shape, flight behavior and aerodynamic efficiency among Morpho butterflies living in different forest strata, by combining high-speed videography in the field with morphometric analyses and aerodynamic modelling. By...

Measuring phylogenetic information of incomplete sequence data

Tae-Kun Seo, Olivier Gascuel & Jeffrey Thorne
Widely used approaches for extracting phylogenetic information from aligned sets of molecular sequences rely upon probabilistic models of nucleotide substitution or amino-acid replacement. The phylogenetic information that can be extracted depends on the number of columns in the sequence alignment and will be decreased when the alignment contains gaps due to insertion or deletion events. Motivated by the measurement of information loss, we suggest assessment of the Effective Sequence Length (ESL) of an aligned data...

Alignement and phylogenetic tree of 106 Lepidoptera

Charline Pinna, Florence Piron-Prunier & Marianne Elias
We used both published and de novo sequences from one mitochondrial gene and seven nuclear genes, representing a total length of 7433 bp to infer a molecular phylogeny for 106 lepidopteran species. Müllerian mimicry is a positive interspecific interaction, whereby co-occurring defended prey species share a common aposematic signal. In Lepidoptera, aposematic species typically harbour conspicuous opaque wing colour patterns with convergent optical properties among co-mimetic species. Surprisingly, some aposematic mimetic species have partially transparent...

Data from: Environmental constraints and call evolution in torrent dwelling frogs

Sandra Goutte, Alain Dubois, Samuel David Howard, Rafael Marquez, Jodi J. Rowley, J. Maximilian Dehling, Philippe Grandcolas, Xiong Rongchuan, Frédéric Legendre & Jodi J. L. Rowley
While acoustic signals are important for communication in many taxa, signal propagation is affected by environmental properties. Strong environmental constraints should drive call evolution, favoring signals with greater transmission distance and content integrity in a given calling habitat. Yet, few empirical studies have verified this prediction, possibly due to a shortcoming in habitat characterization, which is often too broad. Here we assess the potential impact of environmental constraints on the evolution of advertisement call in...

Data from: Does aquatic foraging impact head shape evolution in snakes?

Marion Segall, Raphaël Cornette, Anne-Claire Fabre, Ramiro Godoy-Diana & Anthony Herrel
Evolutionary trajectories are often biased by developmental and historical factors. However, environmental factors can also impose constraints on the evolutionary trajectories of organisms leading to convergence of morphology in similar ecological contexts. The physical properties of water impose strong constraints on aquatic feeding animals by generating pressure waves that can alert prey and potentially push them away from the mouth. These hydrodynamic constraints have resulted in the independent evolution of suction feeding in most groups...

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