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Abrodictyum polynesicum (Hymenophyllaceae, Polypodiidae), a new fern species for the French Polynesia
No full textInternational audienceThe filmy fern Abrodictyum asae-grayi (Hymenophyllaceae) is thought to be distributed from New Guinea to French Polynesia. However, specimens from the Marquesas Islands and some populations from the Society Islands show clearly erect rhizomes, while the species A. asae-grayi is described as having creeping rhizomes. In-depth examination of the herbarium specimens and phylogenetic analysis demonstrate that the specimens with creeping rhizomes and those with erect rhizomes define two distinct species. The new species, A. polynesicum, endemic to French Polynesia, is discussed and described here
The Global Spectra-Trait Initiative: A database of paired leaf spectroscopy and functional traits associated with leaf photosynthetic capacity
No full textInternational audienceAccurate assessment of leaf functional traits is crucial for a diverse range of applications from crop phenotyping to parameterizing global climate models. Leaf reflectance spectroscopy offers a promising avenue to advance ecological and agricultural research by complementing traditional, time-consuming gas exchange measurements. However, the development of robust hyperspectral models for predicting leaf photosynthetic capacity and associated traits from reflectance data has been hindered by limited data availability across species and environments. Here we introduce the Global Spectra-Trait Initiative (GSTI), a collaborative repository of paired leaf hyperspectral and gas exchange measurements from diverse ecosystems. The GSTI repository currently encompasses over 7500 observations from 397 species and 41 sites gathered from 36 published and unpublished studies, thereby offering a key resource for developing and validating hyperspectral models of leaf photosynthetic capacity. The GSTI database is developed on GitHub (https://github.com/plantphys/gsti, last access: 4 January 2026) and published to ESS-DIVE https://doi.org/10.15485/2530733, Lamour et al., 2025). It includes gas exchange data, derived photosynthetic parameters, and key leaf traits often associated with traditional gas exchange measurements such as leaf mass per area and leaf elemental composition. By providing a standardized repository for data sharing and analysis, we present a critical step towards creating hyperspectral models for predicting photosynthetic traits and associated leaf traits for terrestrial plants
MiCoReCa (Microbiome Community Resource Catalogue) - Towards Centralized Curation And Integration Of Microbiome Bioinformatics Resources
No full textThe rapid growth of microbiome research has led to the development of numerous bioinformatics tools and databases, but information about them remains fragmented across disparate, often outdated cataloging efforts, hindering resource discovery and utilization. To address this critical gap, the ELIXIR Microbiome Community proposes the development of MiCoReCa (Microbiome Community Resource Catalogue), a comprehensive, dynamic, open-access catalogue of microbiome-related bioinformatics resources (tools, workflows, training, standards, and databases). Leveraging our community's expertise, this initiative will utilize standardized ontologies like EDAM and cross-reference established platforms like bio.tools and WorkflowHub to create a centralized, findable inventory. A key feature is the community-driven process for identifying and curating missing ontological terms and metadata, ensuring MiCoReCa's accuracy and relevance in collaboration with partner platforms. Furthermore, the catalogue will integrate links to training materials from TeSS to support appropriate tool usage, and connect with OpenEBench for benchmarking capabilities. This project will not only provide a vital resource for the microbiome field, enhancing research efficiency and reproducibility, but will also establish a sustainable, adaptable infrastructure potentially applicable to other ELIXIR Communities. This effort represents a significant contribution by the ELIXIR Microbiome Community to streamline microbiome bioinformatics
Preserved Memories, Silenced Memories: From the Empress Joséphine to Émilie, the Enslaved Woman, at the Domaine de La Pagerie, Martinique, 1944–2022
No full textInternational audienceLocated in the commune of Trois-Îlets, the Domaine de la Pagerie is a former sugar plantation that bears witness to Martinique's colonial and slave-owning history. The site is also notable for being the childhood home of the woman who would later become Napoleon's wife and Empress of France: Marie Josèphe Rose Tascher de La Pagerie, known as Joséphine de Beauharnais.In 1944, Dr Rose-Rosette, a scholar and history enthusiast who was mayor of the town between 1953 and 1971, was convinced that tourism was key to the development of the Caribbean following the decline of the sugar industry. He purchased the estate and turned it into one of Martinique's oldest heritage sites. Forty years later, with the site receiving around 42,000 visitors a year, Dr Rose-Rosette sold the La Pagerie estate to the General Council, which managed it through an association until 2015. That year, the site passed into the hands of the Territorial Collectivity of Martinique due to statutory and institutional changes on the island. This site, long perceived as the "Josephine Museum", is then the subject of reflection on what it reveals about its history. The museography was redesigned in 2020 to include the stories of enslaved people such as Émilie.Based on my study of Dr Robert Rose-Rosette's archives and my participation in the new museum design projects, this article questions the memory policies and practices that have been implemented at this site between 1944 and 2022, where competing memories are strongly mobilised and crystallised around the figure of Josephine and her alleged role in Napoleon's restoration of slavery in France in 1802.Situé dans la commune des Trois-Îlets, le domaine de la Pagerie est une ancienne habitation-sucrerie témoin de l'histoire coloniale et esclavagiste de la Martinique. Le site a aussi la particularité d'être le lieu où vécu enfant celle qui fut ensuite épouse de Napoléon et impératrice des Français : Marie Josèphe Rose Tascher de La Pagerie, dite Joséphine de Beauharnais.En 1944, le Dr Rose-Rosette, homme érudit et passionné d'histoire, maire de la commune entre 1953 et 1971, convaincu que le tourisme était une clé de développement des Antilles suite au déclin de l'industrie sucrière, achète cette habitation pour en faire l’un des plus anciens sites patrimoniaux de la Martinique. 40 ans plus tard, alors que le site reçoit environ 42000 visiteurs par an, le Dr Rose-Rosette vend le domaine de La Pagerie au Conseil général, qui en assure la gestion via une association jusqu'en 2015. Cette année-là, le site passe aux mains de la Collectivité territoriale de Martinique du fait des évolutions statutaires et institutionnelles de l'île. Ce site, longtemps perçu comme le « musée de Joséphine », fait alors l’objet d’un travail de réflexion sur ce qu’il donne à voir de son histoire. La muséographie a notamment été refaite en 2020, incluant désormais des parcours d’esclavisés telle Émilie.À partir de l’étude des archives du Dr Robert Rose-Rosette et de ma participation aux projets à la nouvelle muséographie, cet article questionne les politiques et les pratiques mémorielles qui ont été menées sur ce site entre 1944 et 2022, où les concurrences mémorielles sont fortement mobilisées et cristallisées autour du personnage de Joséphine et de son rôle présumé dans le rétablissement de l’esclavage par Napoléon en France en 1802
Polyploidy modulates the adaptation to water deficit in citrus scion/rootstock associations evaluated under controlled pot condition and relates to specific changes in root and leaf transcriptome
No full textData availability: The RNA-seq data underlying this article are available in Gene Expression Omnibus (GEO) database at: https://www.ncbi.nlm.nih.gov/geo, and can be accessed with the project accession number: GSE255759.International audienceHighlights: • Tetraploid rootstocks with triploid scions enhance drought tolerance in pots. • In pots, 4x rootstocks better regulate water loss under drought conditions. • ABA levels under stress are higher in 4× than in 2× rootstocks. • DEGs involved in transport, stress response and protective barrier formation. • Polyploidy shows strong potential to improve citrus drought resilience.Abstract: Citrus, one of the world's most important crops, is facing significant challenges due to drought events. Previous studies have demonstrated that tetraploid rootstocks may exhibit greater tolerance to abiotic stresses than their diploid counterparts. The effects of combining a tetraploid rootstock with a triploid scion under water deficit conditions have not been thoroughly explored. A water deficit experiment was conducted under controlled pot conditions using four citrus scion/rootstock combinations: diploid and tetraploid Swingle citrumelo rootstocks grafted with diploid Mexican lime and triploid Persian lime. Physiological, biochemical, and transcriptomic analyses under controlled pot condition revealed that tetraploid rootstocks exhibited significantly improved performance under drought stress, with an even greater effect when the scion was the triploid Persian lime. In that condition, the improved resilience was associated with reduced water consumption, higher photosynthesis, increased stomatal conductance and transpiration under water stress conditions. Elevated abscisic acid levels and stronger antioxidant activity in polyploid rootstocks further contributed to the stress response. Transcriptomic data revealed distinct gene expression changes in roots and leaves, influenced by organ ploidy and rootstock-scion interactions. Taken together our results provide insights into drought adaptation mechanisms including osmotic adjustment, oxidative stress protection, sustained photosynthesis, antioxidant enzyme activity and enhanced synthesis of protective barriers. These findings underscore ploidy's role at both rootstock and scion levels in shaping the plant's response to water deficit, revealing useful interactions between rootstock and scion influencing drought resilience
Nouvelles considérations sur la remarquable variabilité du genre Chaerilobuthus Lourenço & Beigel, 2011 (Scorpiones : Chaerilobuthidae) et description d’une nouvelle espèce de l’ambre du Crétacé inférieur de Myanmar
No full textInternational audienceOne more new species of fossil scorpion belonging to the genus Chaerilobuthus Lourenço & Beigel, 2011 is described from Early Cretaceous Burmite. Chaerilobuthus muelleri Lourenço sp. n., represents the 15th species to be described for this genus confirming therefore the strong speciose characteristic of this group. The new species shows several clear morphologicaldifferences when compared to the previous known species, attesting the existence of a major variability within Chaerilobuthus. A list of the known species is presented, as well a number of comments on the variability of different morphological characters.Une nouvelle espèce de scorpion fossile appartenant au genre Chaerilobuthus Lourenço & Beigel, 2011, est décrite de l’ambre du Crétacé inférieur du Myanmar. Chaerilobuthus muelleri Lourenço sp. n. représente la quinzième espèce connue pour ce genre, confirmant ainsi la grande richesse spécifique de ce groupe. La nouvelle espèce présente plusieurs caractères nettement distincts lorsque comparée aux espèces préalablement connues, confirmant ainsi l’existence d’une importante variabilité morphologique au sein du genre Chaerilobuthus. Une liste des espèces connues est présentée, ainsi que de nombreux commentaires sur la variabilité des caractères morphologiques
Proceedings IGS 2025: 22nd conference of the International Graphonomics Society
No full textInternational audienceThese proceedings present the extended abstracts of all the papers and posters that were presented during the 22nd Conference of the International Graphonomics Society held at Polytechnique Montréal on June 2-5, 2025.Overall, 80 researchers from 15 countries, participated in the conference. Their presentations covered 12 topics dealing with methods for capturing, processing and investigating human movements, including recent applications in healthcare, education, sports, arts, forensic science, cybersecurity, anthropomorphic robots and artificial intelligence.A rigorous review process led by the program chairs has resulted in the selection of 50 papers. The presentation format for each selected paper was determined by the presence of at least two positive reviews from two different members of the international independent review panel. These presentations are included as well as three keynotes speeches from Carl-Éric Aubin, Simon Graham, and Sylvain Calinon.OPEN ACCESS PDF : https://pum.umontreal.ca/catalogue/proceedings_igs_202
Trait diversity enhances biomass gains via canopy packing in old-growth but not in disturbed Amazon forests
No full textThe existence of a causal link between biodiversity and forest productivity remains largely unexplored in natural systems, especially in hyper-diverse tropical forests. Canopy packinggreater crown complementarity, resulting in more densely packed canopies-has recently emerged as a key structural pathway through which diversity influences forest functioning, though evidence remains limited and sometimes contradictory.In this study, we used repeated airborne LiDAR acquisitions and long-term field monitoring from a tropical logging experiment in French Guiana to quantify canopy packing using the Shannon evenness of plant area density (PAD) and assess its role in mediating the relationship between trait diversity and biomass gains in oldgrowth and disturbed Amazonian forest stands.Our results show that, in undisturbed forests, functionally diverse communities promote greater canopy packing, which in turn enhances biomass gains. However, this effect was absent in previously logged stands, where forest structural diversity did not fully recover even after 40 years. Our findings indicate that logging reduces canopy structural complexity and disrupts the link between species composition, canopy packing, and productivity in these hyper-diverse, hyper-productive ecosystems
Fréquence de rédaction de directives anticipées chez les patients hospitalisés en Martinique
No full textInternational audienceBackground. -There is a paucity of data regarding the frequency of advance directives (AD) in Martinique. Yet, the population of Martinique is aging, with high rates of socioeconomic disadvantage, a traditional family model and one of the highest death rates worldwide, resulting in quite particular end-of-life conditions. Aim. -We aimed to describe the frequency of AD preparation among patients hospitalized in the University Hospital of Martinique, (hospitalization in medical, surgical and home hospitalization departments). The secondary objectives were to identify the sociodemographic and health factors associated with advance directives, as well as to explore the barriers and levers promoting their drafting.Contexte: Il existe peu de données concernant la fréquence des directives anticipées (DA) en Martinique. Or, la population martiniquaise vieillit, présente des taux élevés de précarité socio-économique, un modèle familial traditionnel et l'un des taux de mortalité les plus élevés au monde, ce qui se traduit par des conditions de fin de vie assez particulières. Objectif: Nous avons cherché à décrire la fréquence de la préparation des DA chez les patients hospitalisés à l'hôpital universitaire de Martinique (hospitalisation dans les services de médecine, de chirurgie et d'hospitalisation à domicile). Les objectifs secondaires étaient d'identifier les facteurs sociodémographiques et de santé associés aux directives anticipées, ainsi que d'explorer les freins et les leviers favorisant leur rédaction. Méthodes: Dans le cadre d'une étude transversale, nous avons recueilli des données entre juin et septembre 2024 à l'aide d'un questionnaire papier auprès de 227 patients hospitalisés à l'hôpital universitaire de Martinique (médecine, chirurgie) et à domicile. Une analyse descriptive a été réalisée. L'analyse a été effectuée à l'aide du logiciel R, version 4.4.1. Les réponses ont toutes été classées et sont décrites en nombre et en pourcentage pour chaque option de réponse. Résultats: Dans l'ensemble, 6,6 % des patients hospitalisés avaient rédigé des directives anticipées. Parmi les patients n'ayant pas rédigé les directives anticipées, 65 % savaient qu'il existait une législation sur la fin de vie, mais seulement 19 % connaissaient les directives anticipées. Les principaux obstacles à la rédaction de directives anticipées étaient le manque de connaissances à ce sujet (46,2 %) et le refus de penser à sa propre fin de vie (25,8 %). La principale raison qui motivait les patients à préparer des directives anticipées était de s'assurer que leurs souhaits seraient respectés (86,7 %). Après avoir rempli le questionnaire, environ 40 % des patients ont déclaré qu'ils rédigeraient des directives anticipées ultérieurement, principalement afin de s'assurer que leurs souhaits seraient respectés en fin de vie. La famille semble jouer un rôle clé dans les décisions de fin de vie. Les patients préfèrent parler de la fin de vie avec leurs proches plutôt qu'avec les médecins. Conclusion: Compte tenu de la très faible fréquence des directives anticipées dans la population martiniquaise, il existe clairement un besoin urgent d'intégrer les directives anticipées dans le paradigme médical et social
Unlocking the Microbiome-Metabolome Nexus for Innovative One-Health Solution
No full textMicrobial communities, encompassing a vast taxonomic diversity, are fundamental to ecosystem integrity, biogeochemical cycles, and the health of humans, animals, and plants, along the One Health concept. A major scientific goal is to understand how these complex consortia function, interact, and adapt to environmental changes. Microbial meta-metabolomics has emerged as a powerful approach to tackle this by characterizing the collective metabolome of an entire community, linking it to environmental conditions and biogeochemical processes. It captures the functional output of both cultivable and uncultivable organisms, tracing chemical interactions and the impact of environmental perturbations. However, while meta-metabolomics provides a comprehensive snapshot of community chemistry, it alone cannot decipher the precise dynamics of which microorganisms are producing metabolites, when, where, and why. To address this, we propose the Microbial Metabolomics Framework (MiMetWork). This novel framework expands beyond descriptive meta-metabolomics to integrate spatial and temporal metabolomic characterizations with other omics data and phenotyping techniques. MiMetWork employs high-throughput screening of various microbiome components—from single cells to complex communities—under controlled conditions to elucidate ecophysiological functions and interaction mechanisms. By combining untargeted and targeted metabolomic datasets with microbial composition and pathway information, MiMetWork aims to build causal models of microbiome function and adaptation. This review outlines how this integrative framework leverages technological advances to elucidate microbiome interactions and functional responses across human, animal, and environmental niches, thereby addressing critical research gaps and enhancing our predictive understanding of microbiomes within the One Health paradigm