Search

Your search keyword '"Groupe de recherche en écologie arctique (GREA)"' showing total 3 results
Start Over Author "Groupe de recherche en écologie arctique (GREA)" Publisher hal ccsd
3 results on '"Groupe de recherche en écologie arctique (GREA)"'

1. High connectivity in a long-lived high-Arctic seabird, the ivory gull Pagophila eburnea

Author

R. I. Guy Morrison, Maria Gavrilo, Olivier Gilg, Mark L. Mallory, Hallvard Strøm, Jonathan M. Yearsley, Adrian Aebischer, Glenn Yannic, Thomas Broquet, H. Grant Gilchrist, Christophe Dufresnes, Roberto Sermier, Université Laval, Université de Moncton, Groupe de recherche en écologie arctique ( GREA ), University College Dublin [Dublin] ( UCD ), Université de Lausanne ( UNIL ), Biogéosciences [Dijon] ( BGS ), AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Museum of Natural History Fribourg, National Park Russian Arctic, Joint Directorate of Taimyr Nature Reserves, Norwegian Polar Institute, Acadia University, Wolfville, National Wildlife Research Center, Environment and Climate Change Canada, Department of Biology, Carleton University ( Carleton University ), Carleton University, Adaptation et diversité en milieu marin ( ADMM ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS ), DIVersité et COnnectivité dans le paysage marin côtier ( DIVCO ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS ), Université Laval [Québec] (ULaval), Groupe de recherche en écologie arctique (GREA), University College Dublin [Dublin] (UCD), Université de Lausanne (UNIL), Biogéosciences [UMR 6282] [Dijon] (BGS), Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Centre National de la Recherche Scientifique (CNRS), Acadia University, Department of Biology, Carleton University (Carleton University), Adaptation et diversité en milieu marin (AD2M), Station biologique de Roscoff [Roscoff] (SBR), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), DIVersité et COnnectivité dans le paysage marin côtier (DIVCO), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Station biologique de Roscoff [Roscoff] (SBR), Université de Lausanne = University of Lausanne (UNIL), Biogéosciences [UMR 6282] (BGS), and Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)

Subjects
0106 biological sciences, 0301 basic medicine, Breeding dispersal, Natal dispersal, Range (biology), Population, Metapopulation, 010603 evolutionary biology, 01 natural sciences, 03 medical and health sciences, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, biology.animal, Genetic model, Effective number of breeders, Population genetic structure, 14. Life underwater, education, education.field_of_study, [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE], biology, Ecology, [ SDV.EE.ECO ] Life Sciences [q-bio]/Ecology, environment/Ecosystems, [ SDV.GEN.GPO ] Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE], 030104 developmental biology, Arctic, Genetic structure, embryonic structures, Biological dispersal, Seabird, General Agricultural and Biological Sciences, Overlapping generation model
Abstract

International audience; Species may cope with rapid habitat changes by distribution shifts or adaptation to new conditions. A common feature of these responses is that they depend on how the process of dispersal connects populations, both demographically and genetically. We analyzed the genetic structure of a near-threatened high-Arctic seabird, the ivory gull (Pagophila eburnea) in order to infer the connectivity among gull colonies. We analyzed 343 individuals sampled from 16 localities across the circumpolar breeding range of ivory gulls, from northern Russia to the Canadian Arctic. To explore the roles of natal and breeding dispersal, we developed a population genetic model to relate dispersal behavior to the observed genetic structure of worldwide ivory gull populations. Our key finding is the striking genetic homogeneity of ivory gulls across their entire distribution range. The lack of population genetic structure found among colonies, in tandem with independent evidence of movement among colonies, suggests that ongoing effective dispersal is occurring across the Arctic Region. Our results contradict the dispersal patterns generally observed in seabirds where species movement capabilities are often not indicative of dispersal patterns. Model predictions show how natal and breeding dispersal may combine to shape the genetic homogeneity among ivory gull colonies separated by up to 2800 km. Although field data will be key to determine the role of dispersal for the demography of local colonies and refine the respective impacts of natal versus breeding dispersal, conservation planning needs to consider ivory gulls as a genetically homogeneous, Arctic-wide metapopulation effectively connected through dispersal.

Published
2016
Full Text
View/download PDF

2. Are gastrointestinal parasites associated with the cyclic population dynamics of their arctic lemming hosts?

Author

Vladimir Gilg, Nicolas Meyer, Loïc Bollache, Mathilde Lebbar, Voitto Haukisalmi, Eve Afonso, Benoît Sittler, Johannes Lang, Jannik Hansen, Lars H. Hansen, Olivier Gilg, Anita Lang, Niels Martin Schmidt, Jérôme Moreau, Brigitte Sabard, Glenn Yannic, Heikki Henttonen, Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE), Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Groupe de recherche en écologie arctique (GREA), Groupe de Recherche en Ecologie Arctique, Laboratoire d'Ecologie Alpine (LECA ), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Department of Bioscience, Aarhus University [Aarhus]-Arctic Research Centre, Chair for Nature Conservation and Landscape Ecology, Clinic for Birds, Reptiles, Amphibians & Fish, Justus-Liebig-Universität Gießen (JLU), Natural Resources Institute Finland (LUKE), Biogéosciences [UMR 6282] [Dijon] (BGS), Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, and Study supported by the French Polar Institute-IPEV [Program 'Interactions 1036'] and analyses funded by the Fondation de Coopération Scientifique of the Université de Bourgogne Franche-Comté [grant 'BQR'].

Subjects
0106 biological sciences, Population dynamics, Population, Greenland, Zoology, Biology, 010603 evolutionary biology, 01 natural sciences, Article, Eimerians, biology.animal, lcsh:Zoology, Parasite hosting, Juvenile, [SDV.MP.PAR]Life Sciences [q-bio]/Microbiology and Parasitology/Parasitology, 14. Life underwater, lcsh:QL1-991, education, Trophic level, Faecal prevalence, education.field_of_study, Cestodes, Vertebrate, Rodent-parasites interactions, 010601 ecology, Infectious Diseases, Taxon, Arctic, Delayed density dependence, Animal Science and Zoology, Parasitology, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, [SDV.EE.IEO]Life Sciences [q-bio]/Ecology, environment/Symbiosis
Abstract

Many rodents, including most populations of arctic lemmings (genus Dicrostonyx and Lemmus), have cyclic population dynamics. Among the numerous hypotheses which have been proposed and tested to explain this typical characteristic of some terrestrial vertebrate communities, trophic interactions have often been presented as the most likely drivers of these periodic fluctuations. The possible role of parasites has, however, only seldom been assessed. In this study, we genetically measured the prevalence of two endoparasite taxa, eimerians and cestodes, in 372 faecal samples from collared lemmings, over a five year period and across three distant sites in Northeast Greenland. Prevalence of cestodes was low (2.7% over all sites and years) and this taxon was only found at one site (although in 4 out of 5 years) in adult hosts. By contrast, we found high prevalence for eimerians (77.7% over all sites and years), which occurred at all sites, in every year, for both age classes (at the Hochstetter Forland site where both adult and juvenile faeces were collected) and regardless of reproductive and social status inferred from the characteristics of the lemming nests where the samples had been collected. Prevalence of eimerians significantly varied among years (not among sites) and was higher for juvenile than for adult lemmings at the Hochstetter Forland site. However, higher prevalence of eimerians (Pt) was only associated with lower lemming density (Nt) at one of the three sites and we found no delayed density dependence between Nt and Pt+1 to support the parasite hypothesis. Our results show that there is no clear relation between lemming density and eimerian faecal prevalence in Northeast Greenland and hence no evidence that eimerians could be driving the cyclic population dynamics of collared lemmings in this region., Graphical abstract Image 1, Highlights • Prevalence of eimerians and cestodes was measured in collared lemming in Greenland. • Prevalence of cestodes was low (2.7%; one site only) compared to eimerians (78%). • Prevalence of eimerians was higher for juveniles and varied among years. • Prevalence of eimerians was negatively associated with lemming density at one site. • lack of delayed density dependence does not support the parasite hypothesis for lemming cycles.

Published
2019
Full Text
View/download PDF

3. Satellite tracking of Ross’s Gull Rhodostethia rosea in the Arctic Ocean

Author

Alexandre Andreev, Alexander Kondratyev, Olivier Gilg, Adrian Aebischer, Aleksandr Sokolov, Andrew Dixon, Biogéosciences [Dijon] ( BGS ), AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Groupe de recherche en écologie arctique ( GREA ), Laboratory of Ornithology, Institute of Biological Problems of the North ( IBPN ), Ecological Research Station of Institute of Plant and Animal Ecology, Ural Branch of Russian Academy of Sciences ( UB RAS ), International Wildlife Consultants Ltd, and Groupe de Recherche en Ecologie Arctique

Subjects
0106 biological sciences, Delta, Satellite tracking, 01 natural sciences, 010605 ornithology, Ross’s Gull, Sea ice, Rhodostethia rosea, Staging area, Rates of travel, [ SDV.BID ] Life Sciences [q-bio]/Biodiversity, [ SDE.BE ] Environmental Sciences/Biodiversity and Ecology, geography.geographical_feature_category, biology, Polar night, Ecology, biology.organism_classification, 010601 ecology, Siberia, Oceanography, Geography, Habitat, Arctic, Archipelago, Post-breeding migration, Sea-ice
Abstract

5 pages; International audience; Ross’s Gull is one of the most emblematic Arctic birds and least known seabirds in the world; post-breeding movements and the use of sea-ice habitats have been long debated, but described only from scattered observations. We tracked two adults, a male and female, breeding in the Kolyma Delta, Russia, using the lightest (

Published
2016
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results