Nye registreringer

  • Biogenic silica production and diatom dynamics in the Svalbard region during spring 

    Krause, J. W.; Duarte, Carlos M.; Marquez, I. A.; Assmy, Phillipp; Fernández-Méndez, Mar; Wiedmann, Ingrid; Wassmann, Paul; Kristiansen, Svein; Agusti, Susana (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-06)
    Diatoms are generally the dominant contributors to the Arctic Ocean spring bloom, which is a key event in regional food webs in terms of capacity for secondary production and organic matter export. Dissolved silicic acid is an obligate nutrient for diatoms and has been declining in the European Arctic since the early 1990s. The lack of regional silicon cycling information precludes understanding the ...
  • Holistic Assessment of Rumen Microbiome Dynamics through Quantitative Metatranscriptomics Reveals Multifunctional Redundancy during Key Steps of Anaerobic Feed Degradation 

    Söllinger, Andrea; Tveit, Alexander Tøsdal; Poulsen, Morten; Noel, Samantha Joan; Bengtsson, Mia M. B.; Bernhardt, Jörg; Hellwing, Anne L. Frydendahl; Lund, Peter; Riedel, Katharina; Schleper, Christa; Ole, Højberg; Urich, Tim (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-07)
    Ruminant livestock is a major source of the potent greenhouse gas methane. The complex rumen microbiome, consisting of bacteria, archaea, and microbial eukaryotes, facilitates anaerobic plant biomass degradation in the cow rumen, leading to methane emissions. Using an integrated approach combining multidomain quantitative metatranscriptomics with gas and volatile fatty acid (VFA) profiling, we ...
  • Drivers of diet patterns in a globally distributed freshwater fish species 

    Sánchez-Hernández, Javier; Finstad, Anders Gravbrøt; Arnekleiv, Jo Vegar; Kjærstad, Gaute; Amundsen, Per-Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-24)
    We analysed data of a globally distributed model organism (brown trout) in an attempt to understand relationships among biogeography, prey communities and climate on diet composition at regional spatial scales (Scandinavia), and thereafter explored whether diet patterns remained the same at global scales. At regional scales, we uncovered comprehensive patterns in diet composition among neighbouring ...
  • The role of trust in sustainable management of land, fish, and wildlife populations in the Arctic 

    Schmidt, Jennifer Irene; Clark, Douglas; Lokken, Nils; Lankshear, Jessica; Hausner, Vera Helene (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-01)
    Sustainable resource management depends on support from the public and local stakeholders. Fish, wildlife, and land management in remote areas face the challenge of working across vast areas, often with limited resources, to monitor land use or the status of the fish-and-wildlife populations. Resource managers depend on local residents, often Indigenous, to gain information about environmental ...
  • The sero-prevalence of brucellosis in cattle and their herders in Bahr el Ghazal region, South Sudan 

    Madut, Nuol Aywel; Muwonge, Adrian; Nasinyama, George William; Muma, John Bwalya; Godfroid, Jacques; Jubara, Ambrose Samuel; Muleme, James; Kankya, Clovice (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-06-20)
    <i>Background</i>: Brucellosis is a worldwide recognized bacterial zoonotic disease. There is currently no information on bovine brucellosis sero-prevalence in South Sudan regardless of the economic, social and public health impact on populations. Therefore, for the first time in 33 years, we report the sero-prevalence of brucellosis in cattle and their herders. Furthermore, we characterize the ...
  • Traditional plant functional groups explain variation in economic but not size‐related traits across the tundra biome 

    Thomas, Haydn J.D.; Myers-Smith, Isla H.; Bjorkman, Anne D.; Elmendorf, Sarah C.; Blok, Daan; Cornelissen, Johannes H. C.; Forbes, Bruce C.; Hollister, Robert D.; Normand, Signe; Prevéy, Janet S.; Rixen, C; Schaepman-Strub, G; Wilmking, M; Wipf, S; Cornwell, W; Kattge, J; Goetz, SJ; Guay, KC; Alatalo, JM; Anadon-Rosell, A; Angers-Blondin, S; Berner, LT; Björk, RG; Buchwal, A; Buras, A; Carbognani, M; Christie, K; Siegwart Collier, L; Cooper, Elisabeth J.; Eskelinen, A; Frei, ER; Grau, O; Grogan, P; Hallinger, M; Heijman, MMPD; Hermanutz, L; Hudson, JMG; Hulber, K; Iturrate-Garcia, M; Iversen, CM; Jaroszynska, Francesca Orinda Holl; Johnstone, JF; Kaarlejärvi, E; Kulonen, A; Lamarque, LJ; Lévesque, E; Little, CJ; Michelsen, A; Milbau, A; Nabe-Nielsen, J; Nielsen, SS; Ninot, JM; Oberbauer, SF; Olofsson, J; Onipchenko, VG; Petraglia, A; Rumpf, SB; Semenchuk, Philipp; Soudzilovskaia, NA; Spasojevic, MJ; Speed, James David Mervyn; Tape, KD; Te Beest, M; Tomaselli, M; Trant, A; Treier, UA; Venn, S; Vowles, T; Weijers, S; Zamin, T; Atkin, OK; Bahn, M; Blonder, B; Campetella, G; Cerabolini, BEL; Chapin III, FS; Dainese, M; de Vries, FT; Díaz, S; Green, W; Jackson, R; Manning, P; Niinemets, Ü; Ozinga, WA; Penuelas, J; Reich, PB; Schamp, B; Sheremetev, S; van Bodegom, Peter Michiel (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-16)
    <p><i>Aim - </i>Plant functional groups are widely used in community ecology and earth system modelling to describe trait variation within and across plant communities. However, this approach rests on the assumption that functional groups explain a large proportion of trait variation among species. We test whether four commonly used plant functional groups represent variation in six ecologically ...
  • Do mothers also "manipulate" grandparental care? 

    Busch, Mari Veierud; Olaisen, Sandra; Bruksås, Ina Jeanette; Folstad, Ivar (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-15)
    Paternity uncertainty has proven to be a robust ultimate hypothesis for predicting the higher investment in grandchildren observed among maternal grandparents compared to that of the paternal grandparents. Yet the proximate mechanisms for generating such preferred biases in grandparental investment remain unclear. Here we address two different questions for better understanding the proximate mechanisms ...
  • Habitats and movement patterns of white whales Delphinapterus leucas in Svalbard, Norway in a changing climate 

    Vacquié-Garcia, Jade; Lydersen, Christian; Ims, Rolf Anker; Kovacs, Kit M. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-24)
    Background: The Arctic is experiencing rapid reductions in sea ice and in some areas tidal glaciers are melting and retracting onto land. These changes are occurring at extremely rapid rates in the Northeast Atlantic Arctic. The aim of this study was to investigate the impacts of these environmental changes on space use by white whales (Delphinapterus leucas) in Svalbard, Norway. Using a unique ...
  • Brucella spp. at the wildlife-livestock interface: An evolutionary trajectory through a livestock-to-wildlife "host jump"? 

    Godfroid, Jacques (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-18)
    Brucella infections in wildlife have gained a lot of interest from the scientific community and different stakeholders. These interests are often different and sometimes conflicting. As a result, different management perspectives and aims have been implemented (One Health, public health, veterinary public health, maintenance of a brucellosis free status in livestock, sustainable wildlife harvesting ...
  • Relationships between depth and δ15N of Arctic benthos vary among regions and trophic functional groups 

    Stasko, Ashley D; Bluhm, Bodil; Reist, James D; Swanson, Heidi; Power, Michael (Journal article; Tidsskriftartikkel; Preprint; Manuskript, 2018-03-27)
    Stable isotope ratios of nitrogen (δ<sup>15</sup>N) of benthic primary consumers are often significantly related to water depth. This relationship is commonly attributed to preferential uptake of <sup>14</sup>N from sinking particulate organic matter (POM) by microbes, and suggests that relationships between δ<sup>15</sup>N and water depth may be affected by local POM sources and flux dynamics. ...
  • Evidence for Strong Fixation Bias at 4-fold Degenerate Sites Across Genes in the Great Tit Genome 

    Gossmann, Toni Ingolf; Bockwoldt, Mathias; Diringer, Lilith; Schwarz, Friedrich; Schumann, Vic-Fabienne (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-29)
    It is well established that GC content varies across the genome in many species and that GC biased gene conversion, one form of meiotic recombination, is likely to contribute to this heterogeneity. Bird genomes provide an extraordinary system to study the impact of GC biased gene conversion owed to their specific genomic features. They are characterized by a high karyotype conservation with ...
  • Asynchronous Accumulation of Organic Carbon and Nitrogen in the Atlantic Gateway to the Arctic Ocean 

    Paulsen, Maria Lund; Seuthe, Lena; Reigstad, Marit; Larsen, Aud; Cape, Matthias; Vernet, Maria (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-15)
    Nitrogen (N) is the main limiting nutrient for biological production in the Arctic Ocean. While dissolved inorganic N (DIN) is well studied, the substantial pool of N bound in organic matter (OM) and its bioavailability in the system is rarely considered. Covering a full annual cycle, we here follow N and carbon (C) content in particulate (P) and dissolved (D) OM within the Atlantic water inflow to ...
  • Long-term responses of zooplankton to invasion by a planktivorous fish in a subarctic watercourse 

    Amundsen, Per-Arne; Siwertsson, Anna; Primicerio, Raul; Bøhn, Thomas (Journal article; Tidsskriftartikkel; Peer reviewed, 2008-08-13)
    <p>1. Introduced or invading predators may have strong impacts on prey populations of the recipient community mediated by direct and indirect interactions. The long‐term progression of predation effects, covering the invasion and establishment phase of alien predators, however, has rarely been documented.</p> <p>2. This paper documents the impact of an invasive, specialized planktivorous fish ...
  • A screening for canine distemper virus, canine adenovirus and carnivore protoparvoviruses in Arctic foxes (Vulpes lagopus) and red foxes (Vulpes vulpes) from Arctic and sub-Arctic regions of Norway 

    Tryland, Morten; Balboni, Andrea; Killengreen, Siw Turid; Mørk, Torill; Nielsen, Ole; Yoccoz, Nigel Gilles; Ims, Rolf Anker; Fuglei, Eva (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-26)
    Canine distemper virus (CDV), canine adenovirus (CAdV) and canine parvovirus type 2 (CPV-2) cause disease in dogs (Canis familiaris). These, or closely related viruses, may also infect wild carnivores. The aim of this study was to investigate exposure to CDV, CAdV and CPV-2 among fox populations in Norway. Arctic foxes (n = 178) from High-Arctic Svalbard were investigated for antibodies against CDV. ...
  • Benthic-pelagic trophic coupling in an Arctic marine food web along vertical water mass and organic matter gradients 

    Stasko, Ashley D; Bluhm, Bodil; Michel, Christine; Archambault, Philippe; Majewski, Andrew; Reist, James D; Swanson, Heidi; Power, Michael (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-04-26)
    Understanding drivers of benthic-pelagic coupling in Arctic marine ecosystems is key to identifying benthic areas that may be sensitive to climate-driven changes in hydrography and surface production. We coupled algal biomass and sedimentary characteristics with stable isotope data for 113 fishes and invertebrates in the Canadian Beaufort Sea and Amundsen Gulf to examine how trophic structure was ...
  • Tundra Trait Team: A database of plant traits spanning the tundra biome 

    Bjorkman, Anne D.; Myers-Smith, Isla H.; Elmendorf, Sarah C.; Normand, Signe; Thomas, Haydn J.D.; Alatalo, Juha M.; Alexander, Heather; Anadon-Rosell, Alba; Angers-Blondin, Sandra; Bai, Yang; Baruah, Gaurav; te Beest, Mariska; Berner, Logan; Björk, Robert G.; Blok, Daan; Bruelheide, Helge; Buchwal, Agata; Buras, Allan; Carbognani, Michele; Christie, Katherine; Collier, Laura Siegwart; Cooper, Elisabeth J.; Cornelissen, J. Hans C.; Dickinson, Katharine J.M.; Dullinger, Stefan; Elberling, Bo; Eskelinen, Anu; Forbes, Bruce C.; Frei, Esther R.; Iturrate-Garcia, Maitane; Good, Megan K.; Grau, Oriol; Green, Peter; Greve, Michelle; Grogan, Paul; Haider, Sylvia; Hájek, Tomáš; Hallinger, Martin; Happonen, Konsta; Harper, Karen A.; Heijmans, Monicque M.P.D.; Henry, Gregory H.R.; Hermanutz, Luise; Hewitt, Rebecca E.; Hollister, Robert D.; Hudson, James; Hülber, Karl; Iversen, Colleen M.; Jaroszynska, Francesca; Jiménez-Alfaro, Borja; Johnstone, Jill; Jørgensen, Rasmus Halfdan; Kaarlejärvi, Elina; Klady, Rebecca; Klimešová, Jitka; Korsten, Annika; Kuleza, Sara; Kulonen, Aino; Lamarque, Laurent J.; Lantz, Trevor; Lavalle, Amanda; Lembrechts, Jonas J.; Lévesque, Esther; Little, Chelsea J.; Luoto, Miska; Macek, Petr; Mack, Michelle C.; Mathakutha, Rabia; Michelsen, Anders; Milbau, Ann; Molau, Ulf; Morgan, John W.; Mörsdorf, Martin Alfons; Nabe-Nielsen, Jacob; Nielsen, Sigrid Schøler; Ninot, Josep M.; Oberbauer, Steven F.; Olofsson, Johan; Onipchenko, Vladimir G.; Petraglia, Alessandro; Pickering, Catherine; Prevéy, Janet S.; Rixen, Christian; Rumpf, Sabine Bettina; Schaepman-Strub, Gabriela; Semenchuk, Philipp; Shetti, Rohan; Soudzilovskaia, Nadejda A.; Spasojevic, Marko J.; Speed, James David Mervyn; Street, Lorna E.; Suding, Katharine; Tape, Ken D.; Tomaselli, Marcello; Trant, Andrew; Treier, Urs A.; Tremblay, Jean-Pierre; Tremblay, Maxime; Venn, Susanna; Virkkala, Anna-Maria; Vowles, Tage; Weijers, Stef; Wilmking, Martin; Wipf, Sonja; Zamin, Tara (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-22)
    <p><i>Motivation</i>: The Tundra Trait Team (TTT) database includes field‐based measurements of key traits related to plant form and function at multiple sites across the tundra biome. This dataset can be used to address theoretical questions about plant strategy and trade‐offs, trait–environment relationships and environmental filtering, and trait variation across spatial scales, to validate satellite ...
  • Developing an observational design for epibenthos and fish assemblages in the Chukchi Sea 

    Iken, Katrin; Mueter, Franz J.; Grebmeier, Jacqueline M.; Cooper, Lee W.; Danielson, Seth L.; Bluhm, Bodil (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-14)
    In light of ongoing, and accelerating, environmental changes in the Pacific sector of the Arctic Ocean, the ability to track subsequent changes over time in various marine ecosystem components has become a major research goal. The high logistical efforts and costs associated with arctic work demand the prudent use of existing resources for the most comprehensive information gain. Here, we compare ...
  • High goose abundance reduces nest predation risk in a simple rodent-free high-Arctic ecosystem 

    Pedersen, Åshild Ønvik; Stien, Jennifer; Eidesen, Pernille Bronken; Ims, Rolf Anker; Jepsen, Jane Uhd; Stien, Audun; Tombre, Ingunn; Fuglei, Eva (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-12-13)
    Breeding geese are the preferred prey of the Arctic fox Vulpes lagopus in the high-Arctic Svalbard archipelago. According to the <i>apparent competition hypothesis (ACH)</i>, less-abundant prey species (e.g. ptarmigan, waders and small passerines) will experience higher predation rates when breeding in association with the more common prey (geese), due to spill-over predation by the shared predator. ...
  • Quantifying individual heterogeneity and its influence on life-history trajectories: different methods for different questions and contexts 

    Hamel, Sandra; Gaillard, Jean-Michel; Douhard, Mathieu; Festa-Bianchet, Marco; Pelletier, Fanie; Yoccoz, Nigel Gilles (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-09-25)
    Heterogeneity among individuals influences the life‐history trajectories we observe at the population level because viability selection, selective immigration and emigration processes, and ontogeny change the proportion of individuals with specific trait values with increasing age. Here, we review the two main approaches that have been proposed to account for these processes in life‐history trajectories, ...
  • Trait-based approaches in rapidly changing ecosystems: A roadmap to the future polar oceans 

    Degen, Renate; Aune, Magnus; Bluhm, Bodil; Cassidy, Camilla; Kędra, Monika; Kraan, Casper; Vandepitte, Leen; Włodarska-Kowalczuk, Maria; Zhulay, Irina; Albano, Paolo G.; Bremner, Julie; Grebmeier, Jacqueline M.; Link, Heike; Morata, Nathalie; Nordström, Marie C.; Shojaei, Mehdi Ghodrati; Sutton, Lauren; Zuschin, Martin (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-04-30)
    Polar marine regions are facing rapid changes induced by climate change, with consequences for local faunal populations, but also for overall ecosystem functioning, goods and services. Yet given the complexity of polar marine ecosystems, predicting the mode, direction and extent of these consequences remains challenging. Trait-based approaches are increasingly adopted as a tool by which to explore ...

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