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Labonne, J., Zhou, M., Manicki, A., Kaeuffer, R., Gueraud, F., Hendry, A. (2014). Consanguinité et sélection sur l'homozygotie chez la truite aux Iles Kerguelen..
Abstract: Colloque de lancement du GdR ‘INVASIONS BIOLOGIQUES’, Rennes, FRA (2014-10-20 – 2014-10-22)
Programme: 1041
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Lebouvier M., Garnier A. (2014). Phanérogames introduites dans les îles subantarctiques françaises : voies d’introduction, dispersion, mesures de gestion. Colloque National du Groupement de Recherche Invasions Biologiques, Rennes, France, 20-22/10/2014 .
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Renault D. (2014). Les écosystèmes insulaires : des instruments idéaux pour traiter des questions relatives aux invasions biologiques. Colloque National du Groupement de Recherche Invasions Biologiques, Rennes, France, 20-22/10/2014.
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Ouisse T., Hendrickx F., Renault D. (2014). Ajustement des traits fonctionnels chez le carabique Merizodus soledadinus au cours du processus d’invasion des îles Kerguelen. Colloque National du Groupement de Recherche Invasions Biologiques, Rennes, France, 20-22/10/2014 .
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Chapuis J.-L., Robin M., Pisanu B., Lebouvier M. (2014). Influence du changement climatique sur l’expansion d’espèces végétales invasives dans l’archipel de Kerguelen. Colloque National du Groupement de Recherche Invasions Biologiques, Rennes, France, 20-22/10/2014.
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Chapuis J.-L., Dutartre A., Séon-Massin N., Triolo J. (2014). Les modalités de lutte en fonction des situations. Assises nationales Espèces Exotique envahissantes, UICN , Orléans, France, 23-25/09/2014 .
Abstract: communication invitée
Programme: 136
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Meyer J.-Y., Barrière P., Chalifour J., Decalf G., Lavergne C., Lebouvier M., Malao A., Soubeyran Y., de Thoisy B., Urtizberea F., Viscardi G. (2014). Enjeux des espèces exotiques envahissantes en France. Bilan pour l’outre-mer : impacts, gestion et défis. Assises nationales Espèces Exotique envahissantes, UICN , Orléans, France, 23-25/09/2014 .
Abstract: communication invitée
Programme: 136
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Barrio I.C., Hik D.S., Charrier M., Frenot Y., Renault D. (2014). Adaptations of a native Subantarctic flightless fly to dehydration stress: more plastic than we thought? 1805-0689, 4(2), 123–128.
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Van de Vijver Bart, . (2014). Four Achnanthidium species (Bacillariophyta) formerly identified as Achnanthidium minutissimum from the Antarctic Region
. 2118-9773 , 79(79), 1–19.
Abstract: Four taxa belonging to the complex of species around Achnanthidium minutissimum were found during the ongoing taxonomic revision of the Antarctic freshwater and limno-terrestrial diatom flora. Two taxa were previously described as Achnanthidium lailae and A. sieminskae . Two others were formerly identified as A. minutissimum but detailed light and scanning electron microscopical observations revealed sufficient morphological differences compared to the type of A. minutissimum , to justify their separation and description as new taxa: Achnanthidium indistinctum and A. maritimo-antarcticum . The morphology and ecology of all four taxa are discussed comparing the species with morphologically similar taxa. The biogeographical consequences of the splitting of the former A. minutissimum complex in the Antarctic Region are discussed.
Keywords: Achnanthidium, Antarctic Region, Bacillariophyta, biogeography, new species,
Programme: 136
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Berthier E, Vincent C, Magnússon E, Gunnlaugsson Á Þ, Pitte P, Le Meur E, Masiokas M, Ruiz L, Pálsson F, Belart J M C, Wagnon P, . (2014). Glacier topography and elevation changes derived from Pléiades sub-meter stereo images
. 1994-0416, 8(6), 2275–2291.
Abstract: In response to climate change, most glaciers are losing mass and hence contribute to sea-level rise. Repeated and accurate mapping of their surface topography is required to estimate their mass balance and to extrapolate/calibrate sparse field glaciological measurements. In this study we evaluate the potential of sub-meter stereo imagery from the recently launched Pléiades satellites to derive digital elevation models (DEMs) of glaciers and their elevation changes. Our five evaluation sites, where nearly simultaneous field measurements were collected, are located in Iceland, the European Alps, the central Andes, Nepal and Antarctica. For Iceland, the Pléiades DEM is also compared to a lidar DEM. The vertical biases of the Pléiades DEMs are less than 1 m if ground control points (GCPs) are used, but reach up to 7 m without GCPs. Even without GCPs, vertical biases can be reduced to a few decimetres by horizontal and vertical co-registration of the DEMs to reference altimetric data on ice-free terrain. Around these biases, the vertical precision of the Pléiades DEMs is ±1 m and even ±0.5 m on the flat glacier tongues (1σ confidence level). Similar precision levels are obtained in the accumulation areas of glaciers and in Antarctica. We also demonstrate the high potential of Pléiades DEMs for measuring seasonal, annual and multi-annual elevation changes with an accuracy of 1 m or better if cloud-free images are available. The negative region-wide mass balances of glaciers in the Mont-Blanc area (−1.04 ± 0.23 m a−1 water equivalent, w.e.) are revealed by differencing Satellite pour l'Observation de la Terre 5 (SPOT 5) and Pléiades DEMs acquired in August 2003 and 2012, confirming the accelerated glacial wastage in the European Alps.
Programme: 1053
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