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9 results on '"Lebreton, Elise"'

1. An assessment of the endemic spermatophytes, pteridophytes and bryophytes of the French Overseas Territories: towards a better conservation outlook

Author

Véron, Simon, Rodrigues-Vaz, Carlos, Lebreton, Elise, Ah-Peng, Claudine, Boullet, Vincent, Chevillotte, Hervé, Gradstein, Stephan Robbert, Jérémie, Joël, Lavocat Bernard, Elisabeth, Lebouvier, Marc, Meyer, Jean-Yves, Munzinger, Jérôme, Poncy, Odile, Thouvenot, Louis, Viscardi, Guillaume, Léotard, Guillaume, Gargominy, Olivier, Leblond, Sébastien, Pignal, Marc, Rouhan, Germinal, Tercerie, Sandrine, Invernon, Vanessa, and Muller, Serge

Published
2021
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2. Further expansion of morphological variability in the Porinaceae (Ascomycota, Ostropales) with the placement of the enigmatic genus Gallaicolichen.

Author

Lebreton, Elise, Ertz, Damien, Lücking, Robert, Simon, Antoine, Smith, Clifford, and Sérusiaux, Emmanuël

Subjects
*ASCOMYCETES, *RIBOSOMAL RNA, *ASCOSPORES, *LICHENS, *MITOCHONDRIA
Abstract

The foliicolous lichen Gallaicolichen pacificus exhibits unique goniocystangia-like structures named peltidiangia and peltidia. Its taxonomic classification within the Ascomycota has been unclear due to the absence of ascomata and lack of molecular data. Here we clarify the phylogenetic affinities of Gallaicolichen pacificus by analyzing mitochondrial small subunit ribosomal RNA (mtSSU) sequences obtained from specimens collected in New Caledonia. Ascomata and ascospores of G. pacificus , previously unknown, are described and illustrated for the first time. The results from the molecular and morphological analyses clearly indicate that Gallaicolichen pacificus belongs to the Porinaceae and is closely related to Porina guianensis. This is a remarkable extension of the already known, wide morphological diversity of thalli and diaspores produced within this family. [ABSTRACT FROM AUTHOR]

Published
2024
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4. Pre-assessments of plant conservation status in islands: the case of French Overseas Territories

Author

Véron, Simon, Bernard, Arthur, Lebreton, Elise, Rodrigues-Vaz, Carlos, Durand, M, Procopio, Lilian, Hélion, Mike, Gayot, Marc, Viscardi, Guillaume, Krupnick, Gary, Carrington, C M Sean, Boullet, Vincent, Mallet, Bertrand, Dimassi, Abassi, Pailler, Thierry, Hivert, Jean, Lebouvier, Marc, Agnola, Pierre, Bruy, David, Gateblé, Gildas, Lannuzel, Guillaume, Meyer, Shankar, Gargominy, Olivier, Gigot, Guillaume, Invernon, Vanessa, Leblond, Sébastien, Pignal, Marc, Tercerie, Sandrine, Muller, Serge, Rouhan, Germinal, Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Diversité, adaptation, développement des plantes (UMR DIADE), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Université de Montpellier (UM), Office national des forêts (ONF), Conservatoire Botanique de Martinique (CBMq), Smithsonian Institution, The University of the West Indies, Institut de Géoarchitecture, Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Brestois des Sciences de l'Homme et de la Société (IBSHS), Université de Brest (UBO)-Université de Brest (UBO), Université de La Réunion (UR), Ecosystèmes, biodiversité, évolution [Rennes] (ECOBIO), Université de Rennes (UR)-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université de Montpellier (UM), Herbier de Nouvelle-Calédonie (Herbier NOU), Institut de Recherche pour le Développement (IRD [Nouvelle-Calédonie]), Institut Agronomique Néo-Calédonien (IAC), New Caledonia Plant Red List Authority Endemia, Patrimoine naturel (PatriNat), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Office français de la biodiversité (OFB), Office Français de la Biodiversité (OFB), Ministère des Outre-mer, and Muséum national d’Histoire naturelle (MNHN)

Subjects
Islands, Ecology, Red List, Tracheophytes, [SDE.MCG]Environmental Sciences/Global Changes, Endemics, Pre-assessments, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, [SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics, Ecology, Evolution, Behavior and Systematics, Nature and Landscape Conservation, French overseas territories
Abstract

International audience; Assessment methods have been developed to estimate a preliminary conservation status for species and subsequently to facilitate the building of Red Lists. Such pre-assessment methods could be particularly useful in the French Overseas Territories (FOTs) where Red Lists tend to be outdated or absent and where a high number of endemic species face detrimental anthropogenic pressures. We first aimed to conduct a preliminary assessment (hereafter, pre-assessment) of the conservation status of endemic plants from Guadeloupe, Martinique, Réunion, Mayotte, French sub-Antarctic islands, New Caledonia, and Scattered Islands. We then compared the various methods used in conducting the pre-assessment and discussed ways to adapt these methods to small territories. We compiled occurrence data of endemic species identified thanks to a previous taxonomic work and pre-assessed their conservation status under Red List criteria A and B and the use of a Random Forest algorithm. We then measured the accuracy, specificity, and sensitivity of each method based on existing Red Lists. The Random Forest algorithm and a method based on range-size performed best at correctly attributing conservation status. Using these pre-assessment methods, we estimated that up to 60% of the endemic flora of the FOTs is potentially threatened. Range restriction but also anthropogenic pressures were key factors that explained these risks. Pre-assessment methods are useful tools to get a first measure of species conservation status. These methods should be adapted to the territories considered and their conservation issues in order to reach a good performance.

Published
2023

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