Transcriptomic data reveal divergent paths of chitinase evolution underlying dietary convergence in anteaters and pangolins.
Ant-eating mammals represent a textbook example of convergent evolution. Among them, anteaters and pangolins exhibit the most extreme convergent phenotypes with complete tooth loss, elongated skulls, protruding tongues, and hypertrophied salivary glands producing large amounts of saliva. However, comparative genomic analyses have shown that anteaters and pangolins differ in their
The fate of South America’s endemic mammalian fauna in response to the most dramatic Cenozoic climate disruption
Cette publication s’inscrit dans le cadre du projet stratégique Emergence, financé par le CEBA entre 2021 et 2023. Chercher à comprendre ce qui a conduit à l’émergence et à la disparition de lignées pendant les crises de la biodiversité pourrait effectivement fournir des informations clés au moment de la sixième
Insights into the subdaily variations in methane, nitrous oxide and carbon dioxide fluxes from upland tropical tree stems
Cette étude montre que les échanges infra-journaliers de CH4, N2O et CO2 varient fortement entre les arbres et les saisons. C’est une ébauche de la compréhension générale de la régulation environnementale des flux de gaz à effet de serre dans les arbres tropicaux. Elle met également en évidence la nécessité
Exon capture museomics deciphers the nine-banded armadillo species complex and identifies a new species endemic to the Guiana shield
Le tatou à neuf bandes est l’espèce de mammifères xénarthres la plus largement distribuée de l’Argentine jusqu’aux Etats-Unis qu’elle a envahi il y a moins de 200 ans. Cette étude montre sur la base d’un jeu de données génomiques et morphologiques que ce que l’on pensait être une seule espèce
Meat-Borne-Parasite: A Nanopore-Based Meta-Barcoding Workflow for Parasitic Microbiodiversity Assessment in the Wild Fauna of French Guiana
La Guyane française, est un réservoir naturel détenant de nombreux agents pathogènes zoonotiques d’importance médicale ou vétérinaire. Les données présentes sur les parasites circulants dans cette région, en particulier les protozoaires du phylum Apicomplexa, sont limités. Néanmoins, les pays voisins rapportent une prévalence parasitaire élevée chez les animaux et les
Inferred drought-induced plant allocation shifts and their impact on drought legacy at a tropical forest site.
Cet article est le fruit d’une collaboration entre l’UMR SILVA, l’UMR ECOFOG, et des collègues de l’Université de Stanford, en Californie (USA). Alors que les sécheresses induisent principalement des réductions immédiates de l’absorption de carbone par les plantes, elles peuvent également exercer des effets durables sur les flux de carbone
Residual water losses mediate the trade-off between growth and drought-survival across saplings of 12 tropical rainforest tree species with contrasting hydraulic strategies
Cet article est dans la continuité des travaux que l’UMR SILVA, en collaboration avec l’UMR ECOFOG, mène sur la biodiversité fonctionnelle des arbres en forêt tropicale humide (WP4 du Labex). Dans cet article, nous présentons des résultats obtenus sur les mécanismes physiologiques sous-jacents à la vulnérabilité des espèces d’arbre de
Population genetic structure and demographic history of the timber tree Dicorynia guianensis in French Guiana
Ce travail initié durant le stage de Master 2 de Julien Bonnier (UMR Biogeco, Université de Bordeaux, 2022) a permis de valoriser des jeux de données de miscrosatellites récoltés lors d’un précédent projet impliquant l’UMR Ecofog et l’ONF (Projects DYGEFOR) sur l’angélique, première essence de bois exploitée en Guyane. Nous
Understanding the transmission of bacterial agents of sapronotic diseases using an ecosystem-based approach: A first spatially realistic metacommunity model.
Plusieurs travaux de MIVEGEC portent sur les micro-organismes sapronotiques pathogènes pour l’homme. Il s’agit de micro-organismes qui vivent et se reproduisent dans l’environnement (sols, eau) en tant qu’organismes à mode de vie libre, sans aucun lien entre leur dynamique populationnelle (donc le risque d’infection pour les vertébrés sensibles) et celles
Detection of Anaplasma and Ehrlichia bacteria in humans, wildlife, and ticks in the Amazon rainforest
Cette étude a mis en évidence de nouvelles espèces bactériennes, inconnues jusqu’à présent, transmises par les tiques à la faune sauvage dans les forêts tropicales de Guyane. Ces bactéries hautement endémiques, appartenant aux genres Anaplasma et Ehrlichia, ont évolué des cycles de transmission uniques, spécifiques aux tiques, mammifères et oiseaux
Not all sweetness and light: Non-structural carbohydrate storage capacity in tree stems is decoupled from leaf but not from root economics
Les carbohydrates non structurels (NSC) sont des indicateurs de l’équilibre source-puit de carbone des arbres, sans que leur contribution aux stratégies fonctionnelles des arbres soit bien établie. Les travaux de thèse de Guangqi Zhang (soutenue en 2022) ont quantifié la teneur en NSC des feuilles, tiges et racines de 90
The importance of reproductive isolation in driving diversification and speciation within Peruvian mimetic poison frogs (Dendrobatidae)
L’un des objectifs principaux des travaux de Lorioux-Chevalier et al. 2024 est de comprendre pourquoi certains caractères aposématiques (coloration vive associée à une toxicité) tendent à ségréger au sein d’une même espèce au lieu de converger vers un unique optimum. Ses travaux, réalisés sur les grenouilles Ranitomeya, ont révélé que
Mosquito Feeding Habits in Coastal French Guiana: Mammals in the Crosshairs?
Pathogens transmitted by mosquitoes (Diptera, Culicidae) in sylvatic or urban cycles involve wild or domestic animals and humans, driven by various mosquito species with distinct host preferences. In this study, mosquito blood meals from coastal French Guiana were analyzed by amplifying and sequencing host DNA from blood-fed females. blood meals
Impact of piperaquine resistance in Plasmodium falciparum on malaria treatment effectiveness in The Guianas: a descriptive epidemiological study
Plasmodium falciparum, responsible for lethal cases of malaria, is treated with artemisinin-based combination therapy including dihydroartemisinin–piperaquine. The emergence of resistant parasites against dihydroartemisinin–piperaquine was reported in southeast Asia in 2008 and. In this work, French Guiana field isolates, 40 (47%) of 86 (95% CI 35·9–57·1) were shown to be resistant
Supercritical CO2 extraction of solid-state cultivation fungus producing azaphilone polyketides
Une partie des travaux sur les holobiontes d’insectes ont permis des développement méthodologiques pour l’analyse des métabolites spécialisés. Nous avons cherché lors de nos études à améliorer les méthodes d’extraction et d’analyse du métabolome de mélanges complexes, et également, à modifier les milieux de culture afin d’orienter les biosynthèses des
Climate anomalies and neighbourhood crowding interact in shaping tree growth in old-growth and selectively logged tropical forests.
La dynamique des forêts tropicales est impactée par les changements climatiques, l’historique de perturbation et les interactions biotiques, mais peu d’études ont tenté de démêler le rôle de l’ensemble de ces facteurs. Les travaux de thèse de Daniela Nemetschek (soutenue en 2023) ont permis d’évaluer les effets des extrêmes macro-climatiques
Sniffing out morphological convergence in the turbinal complex of myrmecophagous placentals
The length of the snout in mammals has important evolutionary consequences for the functional systems housed within the rostrum. However, whether increased snout lengths lead to expanded olfactory performance has rarely been examined. Here, we investigate inner rostral function among 10 species of myrmecophagous (ant- and/or termite-eating) placental mammals and
Pervasive cranial allometry at different scales and variational levels in extant armadillos
Allometry, i.e., morphological variation correlated with size, is a major pattern in organismal evolution. Since size varies both within and among species, allometry occurs at different variational levels. However, the variability of allometric patterns across levels is poorly known since its evaluation requires extensive comparative studies. Here, we implemented a
Bayesian total-evidence dating revisits sloth phylogeny and biogeography: a cautionary tale on morphological clock analyses.
Combining morphological and molecular characters through Bayesian total-evidence dating allows inferring the phylogenetic and timescale framework of both extant and fossil taxa, while accounting for the stochasticity and incompleteness of the fossil record. Such an integrative approach is particularly needed when dealing with clades such as sloths (Mammalia: Folivora), for
OrthoMaM v12: a curated database of single-copy ortholog alignments and trees to study mammalian evolutionary genomics.
To date, the databases built to gather information on gene orthology do not provide end-users with descriptors of the molecular evolution information and phylogenetic pattern of these orthologues. In this context, we developed OrthoMaM, a database of ORTHOlogous MAmmalian Markers describing the evolutionary dynamics of coding sequences in mammalian genomes.
A Late Pleistocene coastal ecosystem in French Guiana was hyperdiverse relative to today
Cette étude rassemblant un consortium international de paléontologues, géologues et biologistes, décrit la découverte d’assemblages fossiles couvrant les derniers 130 000 ans, sous la zone de lancement de la fusée Ariane 6, à Kourou, en Guyane. Ces assemblages côtiers, riches de plus de 270 espèces animales, végétales et de microorganismes,
Low-frequency somatic mutations are heritable in tropical trees Dicorynia guianensis and Sextonia rubra
Le projet stratégique Labex CEBA TREEMUTATION (2020-2023) nous a permis d’assembler et d’annoter deux génomes de référence de grande qualité pour deux espèces d’arbres de Guyane (Dicorynia guianensis et Sextonia rubra) et d’entreprendre la détection de mutations somatiques par reséquençage, ainsi que l’analyse de leur transmission intergénérationnelle aux graines, tout
From teeth to pad: tooth loss and development of keratinous structures in sirenians.
Sirenians are a well-known example of morphological adaptation to a shallow-water grazing diet characterized by a modified feeding apparatus and orofacial morphology. Such adaptations were accompanied by an anterior tooth reduction associated with the development of keratinized pads, the evolution of which remains elusive. Among sirenians, the recently extinct Steller’s
Metagenomics uncovers dietary adaptations for chitin digestion in the gut microbiota of convergent myrmecophagous mammals.
In mammals, myrmecophagy (ant and termite consumption) represents a striking example of dietary convergence. This trait evolved independently at least five times in placentals with myrmecophagous species comprising aardvarks, anteaters, some armadillos, pangolins, and aardwolves. The gut microbiome plays an important role in dietary adaptation, and previous analyses of 16S
Genomic data suggest parallel dental vestigialization within the xenarthran radiation
The recent influx of genomic data has provided greater insights into the molecular basis for regressive evolution, or vestigialization, through gene loss and pseudogenization. As such, the analysis of gene degradation patterns has the potential to provide insights into the evolutionary history of regressed anatomical traits. We specifically applied these
World forests, global change, and emerging pests and pathogens
World forests, global change, and emerging pests and pathogens Jean-François Guégan, Benoit de Thoisy, Mireia Gomez-Gallego, Hervé Jactel Science Direct 2023
Declines in prevalence alter the optimal level of sexual investment for the malaria parasite Plasmodium falciparum
Declines in prevalence alter the optimal level of sexual investment for the malaria parasite Plasmodium falciparum Angela M Early, Flavia Camponovo, Stéphane Pelleau, Gustavo C Cerqueira, Yassamine Lazrek, Béatrice Volney, Manuela Carrasquilla, Benoît de Thoisy, Caroline O Buckee, Lauren M Childs, Lise Musset, Daniel E Neafsey Pubmed 2022
Environmental DNA reveals a mismatch between diversity facets of Amazonian fishes in response to contrasting geographical, environmental and anthropogenic effects
Environmental DNA reveals a mismatch between diversity facets of Amazonian fishes in response to contrasting geographical, environmental and anthropogenic effects Opale Coutant, Céline Jézéquel, Karel Mokany, Isabel Cantera, Raphaël Covain, Alice Valentini, Tony Dejean, Sébastien Brosse, Jérôme Murienne Global Change Biology 2022
The number of tree species on Earth
The number of tree species on Earth Gatti RC, Reich PB, Gamarra JGP, Crowther T, Hui C, Morera A, Bastin JF, de-Miguel S, Nabuurs GJ, Svenning JC, Serra-Diaz JM, Merow C, Enquist B, Kamenetsky M, Lee J, Zhu J, Fang J, Jacobs DF, Pijanowski B, Banerjee A, Giaquinto RA, Alberti
Climate variability and aridity modulate the role of leaf shelters for arthropods: A global experiment
Climate variability and aridity modulate the role of leaf shelters for arthropods: A global experiment Romero GQ, Gonçalves-Souza T, Roslin T, Marquis RJ, Marino NAC, Novotny V, Cornelissen T, Orivel J, Sui S, Aires G, Antoniazzi R, Dáttilo W, Breviglieri CPB, Busse A, Gibb H, Izzo TJ, Kadlec T, Kemp
Faster evolution of a premating reproductive barrier is not associated with faster speciation rates in New World passerine birds
Faster evolution of a premating reproductive barrier is not associated with faster speciation rates in New World passerine birds Freeman BG, Rolland J, Montgomery GA, Schluter D Proceedings of the Royal Society B 2022
A need for null models in understanding disease transmission: the example of Mycobacterium ulcerans (Buruli ulcer disease)
A need for null models in understanding disease transmission: the example of Mycobacterium ulcerans (Buruli ulcer disease) Receveur JP, Bauer A, Pechal JL, Picq S, Dogbe M, Jordan HR, Rakestraw AW, Fast K, Sandel M, Chevillon C, Guégan JF, Wallace JR, Eric Benbow M FEMS Microbiology Reviews 2022
Contribution of soil algae to the global carbon cycle
Contribution of soil algae to the global carbon cycle Jassey VEJ, Walcker R, Kardol P, Geisen S, Heger T, Lamentowicz M, Hamard S, Lara E New Phytologist 2022
Phylogenetic signal and evolutionary relationships among traits of inland fishes along elevational and longitudinal gradients
Phylogenetic signal and evolutionary relationships among traits of inland fishes along elevational and longitudinal gradients Cano-Barbacil C, Radinger J, Grenouillet G, García-Berthou E Freshwater Biology 2022
Diversification of tiny toads (Bufonidae: Amazophrynella ) sheds light on ancient landscape dynamism in Amazonia
Diversification of tiny toads (Bufonidae: Amazophrynella ) sheds light on ancient landscape dynamism in Amazonia Moraes LJCL, Werneck FP, Réjaud A, Rodrigues MT, Prates I, Glaw F, Kok PJR, Ron SR, Chaparro JC, Osorno-Muñoz M, Dal Vechio F, Recoder RS, Marques-Souza S, Rojas RR, Demay L, Hrbek T, Fouquet A
Aboveground biomass density models for NASA’s Global Ecosystem Dynamics Investigation (GEDI) lidar mission
Aboveground biomass density models for NASA’s Global Ecosystem Dynamics Investigation (GEDI) lidar mission Duncanson L, Kellner JR, Armston J, Dubayah R, Minor DM, Hancock S, Healey SP, Patterson PL, Saarela S, Marselis S, Silva CE, Bruening J, Goetz SJ, Tang H, Hofton M, Blair B, Luthcke S, Fatoyinbo L, Abernethy
Heterogeneity in effective size across the genome: effects on the inverse instantaneous coalescence rate (IICR) and implications for demographic inference under linked selection
Heterogeneity in effective size across the genome: effects on the inverse instantaneous coalescence rate (IICR) and implications for demographic inference under linked selection Boitard S, Arredondo A, Chikhi L, Mazet O Genetics 2022
Biodiversity and vector-borne diseases: Host dilution and vector amplification occur simultaneously for Amazonian leishmaniases
Biodiversity and vector-borne diseases: Host dilution and vector amplification occur simultaneously for Amazonian leishmaniases Kocher A, Cornuault J, Gantier JC, Manzi S, Chavy A, Girod R, Dusfour I, Forget PM, Ginouves M, Prévot G, Guégan JF, Bañuls AL, de Thoisy B, Murienne J Molecular ecology 2022
Hybridization boosts dispersal of two contrasted ecotypes in a grass species
Hybridization boosts dispersal of two contrasted ecotypes in a grass species Curran E V., Scott MS, Olofsson JK, Nyirenda F, Sotelo G, Bianconi ME, Manzi S, Besnard G, Pereira L, Christin PA Proceedings of the Royal Society B 2022
When the tail shakes the snake: phylogenetic affinities and morphology of Atractus badius (Serpentes: Dipsadidae), reveals some current pitfalls on the snake’s genomic age
When the tail shakes the snake: phylogenetic affinities and morphology of Atractus badius (Serpentes: Dipsadidae), reveals some current pitfalls on the snake’s genomic age Passos P, Melo-Sampaio PR, Ramos LO, Grazziotin FG, Fouquet A, Torres-Carvajal O Anais da Academia Brasileira de Ciências 2022
The Andes through time: evolution and distribution of Andean floras
The Andes through time: evolution and distribution of Andean floras Pérez-Escobar OA, Zizka A, Bermúdez MA, Meseguer AS, Condamine FL, Hoorn C, Hooghiemstra H, Pu Y, Bogarín D, Boschman LM, Pennington RT, Antonelli A, Chomicki G Trends in Plant Science 2022
Shifts in structural diversity of Amazonian forest edges detected using terrestrial laser scanning
Shifts in structural diversity of Amazonian forest edges detected using terrestrial laser scanning Maeda EE, Nunes MH, Calders K, de Moura YM, Raumonen P, Tuomisto H, Verley P, Vincent G, Zuquim G, Camargo JL Remote Sensing of Environment 2022
Mountain radiations are not only rapid and recent: Ancient diversification of South American frog and lizard families related to Paleogene Andean orogeny and Cenozoic climate variations
Mountain radiations are not only rapid and recent: Ancient diversification of South American frog and lizard families related to Paleogene Andean orogeny and Cenozoic climate variations Boschman LM, Condamine FL Global and Planetary Change 2022
Naive poison frog tadpoles use bi-modal cues to avoid insect predators but not heterospecific predatory tadpoles
Naive poison frog tadpoles use bi-modal cues to avoid insect predators but not heterospecific predatory tadpoles Szabo B, Mangione R, Rath M, Pašukonis A, Reber SA, Oh J, Ringler M, Ringler E Journal of Experimental Biology 2022
Discrimination of 15 Amazonian Anopheline Mosquito Species by Polymerase Chain Reaction—Restriction Fragment Length Polymorphism
Discrimination of 15 Amazonian Anopheline Mosquito Species by Polymerase Chain Reaction—Restriction Fragment Length Polymorphism Vezenegho SB, Issaly J, Carinci R, Gaborit P, Girod R, Dusfour I, Briolant S Journal of Medical Entomology 2022
Contemporary environment and historical legacy explain functional diversity of freshwater fishes in the world rivers
Contemporary environment and historical legacy explain functional diversity of freshwater fishes in the world rivers Su G, Tedesco PA, Toussaint A, Villéger S, Brosse S Global Ecology and Biogeography 2022
Cytogenetic survey of eight ant species from the Amazon rainforest
Cytogenetic survey of eight ant species from the Amazon rainforest Barros LAC, Teixeira GA, Ferreira PC, Lod RB, Silveira LI, Petitclerc F, Orivel J, de Aguiar HJAC Caryologia 2022
Vertical profiles of leaf photosynthesis and leaf traits and soil nutrients in two tropical rainforests in French Guiana before and after a 3-year nitrogen and phosphorus addition experiment
Vertical profiles of leaf photosynthesis and leaf traits and soil nutrients in two tropical rainforests in French Guiana before and after a 3-year nitrogen and phosphorus addition experiment Verryckt LT, Vicca S, Van Langenhove L, Stahl C, Asensio D, Urbina I, Ogaya R, Llusià J, Grau O, Peguero G, Gargallo-Garriga
Spatial patterns in the contribution of biotic and abiotic factors to the population dynamics of three freshwater fish species
Spatial patterns in the contribution of biotic and abiotic factors to the population dynamics of three freshwater fish species Chevalier M, Tedesco P, Grenouillet G PeerJ 2022
Overview of regional-scale diversity patterns of freshwater algae in a Neotropical bromeliad ecosystem
Overview of regional-scale diversity patterns of freshwater algae in a Neotropical bromeliad ecosystem Carrias JF, Corbara B, Leroy C, Céréghino R Freshwater Biology 2022