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Discovery of cryptic plant diversity on the rooftops of the Alps / Florian C. Boucher in Scientific reports, 11 (2021) 

Public Citation [article]  inScientific reports > 11 (2021) . - 1-10 Titre : Discovery of cryptic plant diversity on the rooftops of the Alps Type de document : Imprimé Auteurs : Florian C. Boucher ; Cédric Dentant (1976-) ; Sébastien Ibanez ; Thibaut Capblancq ; Martí Boleda ; Louise Boulangeat ; Jan Smyčka ; Cristina Roquet ; Sébastien Lavergne (1976-) Année de publication : 2021 Article en page(s) : 1-10 Langues : Anglais (eng) Catégories : [CBNPMP-Géographique] Alpes [CBNPMP-Thématique] Chorologie, endémisme, cartographie d'espèce, atlas, catalogue, centre dispersion, région florale, migration [CBNPMP-Thématique] Diversité génétique [CBNPMP-Thématique] Groupement relictuel Résumé : High elevation temperate mountains have long been considered species poor owing to high extinction or low speciation rates during the Pleistocene. We performed a phylogenetic and population genomic investigation of an emblematic high-elevation plant clade (Androsace sect. Aretia, 31 currently recognized species), based on plant surveys conducted during alpinism expeditions. We inferred that this clade originated in the Miocene and continued diversifying through Pleistocene glaciations, and discovered three novel species of Androsace dwelling on different bedrock types on the rooftops of the Alps. This highlights that temperate high mountains have been cradles of plant diversity even during the Pleistocene, with in-situ speciation driven by the combined action of geography and geology. Our findings have an unexpected historical relevance: H.-B. de Saussure likely observed one of these species during his 1788 expedition to the Mont Blanc and we describe it here, over two hundred years after its first sighting. Lien pérenne : DOI : 10.1038/s41598-021-90612-w / HAL : hal-03246552 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=147509 Boucher, Florian C., Dentant, Cédric (1976-), Ibanez, Sébastien, Capblancq, Thibaut, Boleda, Martí, Boulangeat, Louise, Smyčka, Jan, Roquet, Cristina, Lavergne, Sébastien (1976-) 2021 Discovery of cryptic plant diversity on the rooftops of the Alps. Scientific reports, 11: 1-10.

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Consultable Article (2021) URL

Is there any evidence for rapid, genetically-based, climatic niche expansion in the invasive common ragweed ? / Laure Gallien in PloS ONE, 11 (4) (2015) 

Public Citation [article]  inPloS ONE > 11 (4) (2015) . - 17 p. Titre : Is there any evidence for rapid, genetically-based, climatic niche expansion in the invasive common ragweed ? Type de document : Électronique Auteurs : Laure Gallien ; Wilfried Thuiller (1975-) ; Noémie Fort ; Martí Boleda ; Florian J. Alberto ; Delphine Rioux ; Juliette Lainé ; Sébastien Lavergne (1976-) Année de publication : 2015 Article en page(s) : 17 p. Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Résumé : Climatic niche shifts have been documented in a number of invasive species by comparing the native and adventive climatic ranges in which they occur. However, these shifts likely represent changes in the realized climatic niches of invasive species, and may not necessarily be driven by genetic changes in climatic affinities. Until now the role of rapid niche evolution in the spread of invasive species remains a challenging issue with conflicting results. Here, we document a likely genetically-based climatic niche expansion of an annual plant invader, the common ragweed (Ambrosia artemisiifolia L.), a highly allergenic invasive species causing substantial public health issues. To do so, we looked for recent evolutionary change at the upward migration front of its adventive range in the French Alps. Based on species climatic niche models estimated at both global and regional scales we stratified our sampling design to adequately capture the species niche, and localized populations suspected of niche expansion. Using a combination of species niche modeling, landscape genetics models and common garden measurements, we then related the species genetic structure and its phenotypic architecture across the climatic niche. Our results strongly suggest that the common ragweed is rapidly adapting to local climatic conditions at its invasion front and that it currently expands its niche toward colder and formerly unsuitable climates in the French Alps (i.e. in sites where niche models would not predict its occurrence). Such results, showing that species climatic niches can evolve on very short time scales, have important implications for predictive models of biological invasions that do not account for evolutionary processes. Lien pérenne : DOI : 10.1371/journal.pone.0152867 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=142740 Gallien, Laure, Thuiller, Wilfried (1975-), Fort, Noémie, Boleda, Martí, Alberto, Florian J., Rioux, Delphine, Lainé, Juliette, Lavergne, Sébastien (1976-) 2015 Is there any evidence for rapid, genetically-based, climatic niche expansion in the invasive common ragweed ? PloS ONE, 11(4): 17 p..

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Consultable Article (2015) URL