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Your search keyword '"Groupe de recherche en écologie arctique (GREA)"' showing total 4 results
Start Over Author "Groupe de recherche en écologie arctique (GREA)" Topic 010603 evolutionary biology
4 results on '"Groupe de recherche en écologie arctique (GREA)"'

1. Flexibility in otherwise consistent non-breeding movements of a long-distance migratory seabird, the long-tailed skua

Author

Rob van Bemmelen, Loïc Bollache, Jannik Hansen, Sveinn Are Hanssen, Raymond H. G. Klaassen, Børge Moe, Ingrid Tulp, Johannes Lang, Olivier Gilg, Niels Martin Schmidt, Benoît Sittler, Wageningen University and Research Centre [Wageningen] ( WUR ), Norwegian Institute for Nature Research, 7485 Trondheim, Norway, Norwegian Institute for Nature Research (NINA), Arctic Research Centre, Aarhus University [Aarhus], Department of Bioscience, Aarhus University [Aarhus]-Arctic Research Centre, Groupe de recherche en écologie arctique ( GREA ), Chair for Nature Protection and Landscape Ecology, University of Freiburg, Laboratoire Chrono-environnement ( LCE ), Université Bourgogne Franche-Comté ( UBFC ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), Université Bourgogne Franche-Comté ( UBFC ), Dutch Montagu’s Harrier Foundation, Groningen Institute for Evolutionary Life Sciences, Biogéosciences [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 ), Wageningen University and Research [Wageningen] (WUR), Groupe de recherche en écologie arctique (GREA), Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Université Bourgogne Franche-Comté [COMUE] (UBFC), 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 Both group

Subjects
ATLANTIC, 0106 biological sciences, Environmental change, Individual consistency · Repeatability · Stercorarius longicaudus · Seabirds · Tracking · Non-breeding movements · Flexibility, Zoology and botany: 480 [VDP], CONSERVATION, MODELS, TRANS-EQUATORIAL MIGRATION, Aquatic Science, 010603 evolutionary biology, 01 natural sciences, Skua, Stercorarius longicaudus, Onderzoeksformatie, OCEAN, ALBATROSSES, individual consistency, DISPERSAL, biology.animal, Repeatability, Zoologiske og botaniske fag: 480 [VDP], Ecology, Evolution, Behavior and Systematics, Ecology, biology, [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE], 010604 marine biology & hydrobiology, Flexibility (personality), tracking, biology.organism_classification, TERNS STERNA-PARADISAEA, Seabirds, Geolocation, [ SDV.BID.EVO ] Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE], Geography, Arctic, Wildlife Ecology and Conservation, NAVIGATION, WIAS, non-breeding movements, Biological dispersal, Seabird, Flexibility, BEHAVIOR
Abstract

Quantifying within- and between-individual variation in animal migration strategies is a first step towards our understanding of the ability of migrants to adjust to changes in the en - vironment. We studied consistency (or, conversely, flexibility) in movement patterns at large (>1000 km) to meso-scales (100−1000 km) during the non-breeding season of the long-tailed skua Stercorarius longicaudus, a long-distance migratory Arctic seabird, using light-based geolocation. We obtained 97 annual tracks of 38 individuals and quantified similarity between routes. Overall, tracks of the same individual were generally within about 200 to 300 km of their previous year’s route, and more similar than tracks of different individuals. Some flexibility was observed during migration, but individuals were faithful to their staging areas in the North Atlantic and in the Benguela Current off Namibia and South Africa. Over the course of the winter, an increasing number of individuals started to deviate—up to 5200 km—from the previous year’s route. Intriguingly, individuals could be highly consistent between 2 consecutive years and flexible between other years. Site-shifts in late winter seem to reflect responses to local conditions, but what promotes this larger flexibility remains unclear and requires further study. Our results show that individual long-tailed skuas are generally consistent in their itineraries, but can show considerable flexibility in some years. The flexibility in itineraries suggests that long-tailed skuas are able to adjust to environmental change, but the mechanisms leading to the observed within- and between-individual variation in movement patterns are still poorly understood. Individual consistency · Repeatability · Stercorarius longicaudus · Seabirds · Tracking · Non-breeding movements · Flexibility

Published
2017
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2. 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
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3. 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
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4. Molar shape differentiation during range expansions of the collared lemming (Dicrostonyx torquatus) related to past climate changes

Author

Olivier Gilg, Sophie Montuire, Natalya A. Sokolova, Nicolas Navarro, Adam Nadachowski, Anna Lemanik, Aurélien Royer, Aleksandr Sokolov, Emmanuel Desclaux, École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL), 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), Institute of Systematics and Evolution of Animals, Polish Academy of Sciences (PAN), 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), Arctic Research Station of Institute of Plant and Animal Ecology, Ural Branch of Russian Academy of Sciences (UB RAS), Arctic Research Center of Yamal-Nenets Autonomous District, Laboratoire Départemental de Préhistoire du Lazaret (LDPL), Département des Alpes-Maritimes, Culture et Environnements, Préhistoire, Antiquité, Moyen-Age (CEPAM), Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), Funding from the National Science Centre, Poland, grant no: UMO-2017/25/B/NZ8/02005, from the French Polar Institute-IPEV (program 'Interactions 1036'), by PRC CNRS Russia (program 'ECCVAT'), and by the Russian Fund for Basic Research grants #18-05-60261 (Arctic) and #18-54-15013., Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), and Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)

Subjects
Collared lemmings, 0106 biological sciences, Archeology, Pleistocene, Range (biology), Climate, Zoology, [SDV.BID]Life Sciences [q-bio]/Biodiversity, 010603 evolutionary biology, 01 natural sciences, 03 medical and health sciences, Range expansion, Dicrostonyx torquatus, Glacial period, Ecology, Evolution, Behavior and Systematics, 030304 developmental biology, Morphometrics, Geometric morphometrics, 0303 health sciences, Global and Planetary Change, biology, Collared lemming, Geology, biology.organism_classification, Ancient DNA, 13. Climate action, Biological dispersal, [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology
Abstract

12 pages; International audience; The genus Dicrostonyx (the collared lemming) is undoubtedly the small mammal best adapted to the extreme conditions of the arctic environment. The Palearctic collared lemming has been described in numerous European Late Pleistocene localities up to south of France and Croatia. This species experienced climate-driven changes through time, changes mainly observed as repetitive pulses of pan-continental migration, and it thus became a typical indicator of glacial conditions. Using geometric morphometrics on molars, we evaluate the shape changes occurring during the last 100 ky over some dispersal events in Western Europe. The results point out that Dicrostonyx torquatus has a large intra-population variation with a homogenous morphology, regardless of the origin of the individuals. A temporal trend leading to a more complex tooth with a differentiated anterior loop on the first lower molar was observed. An additional effect of the distance from the core populations was also described with a more peculiar shape for the most western populations of France. These temporal and geographical trends might relate to the different migratory pulses documented from ancient DNA haplotypes.

Published
2019
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