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    • Physiological basis for atmospheric methane oxidation and methanotrophic growth on air 

      Schmider, Tilman John Siegfried; Hestnes, Anne Grethe; Brzykcy, Julia; Schmidt, Hannes; Schintlmeister, Arno; Roller, Benjamin; Teran, Ezequiel Jesús; Söllinger, Andrea; Schmidt, Oliver; Polz, Martin; Richter, Andreas; Svenning, Mette Marianne; Tveit, Alexander Tøsdal (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-16)
      Atmospheric methane oxidizing bacteria (atmMOB) constitute the sole bio-logical sink for atmospheric methane. Still, the physiological basis allowing atmMOB to grow on air is not well understood. Here we assess the ability and strategies of seven methanotrophic species to grow with air as sole energy, carbon, and nitrogen source. Four species, including three outside the canonical atmMOB group USCα, ...
    • Essential omega-3 fatty acids are depleted in sea ice and pelagic algae of the Central Arctic Ocean 

      Schmidt, Katrin; Graeve, Martin; Hoppe, Clara J. M.; Torres-Valdes, Sinhué; Welteke, Nahid; Whitmore, Laura M.; Anhaus, Philipp; Atkinson, Angus; Belt, Simon T.; Brenneis, Tina; Campbell, Robert G.; Castellani, Giulia; Copeman, Louise A.; Flores, Hauke; Fong, Allison A.; Hildebrandt, Nicole; Kohlbach, Doreen; Nielsen, Jens M.; Parrish, Christopher C.; Rad-Menéndez, Cecilia; Rokitta, Sebastian D.; Tippenhauer, Sandra; Zhuang, Yanpei (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-19)
      Microalgae are the main source of the omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), essential for the healthy development of most marine and terrestrial fauna including humans. Inverse correlations of algal EPA and DHA proportions (% of total fatty acids) with temperature have led to suggestions of a warming-induced decline in the global production of these biomolecules ...
    • Overview of the MOSAiC expedition: Ecosystem 

      Fong, Allison A.; Hoppe, Clara J. M.; Aberle, Nicole; Ashjian, Carin; Assmy, Philipp Kurt Wolf; Bai, Youcheng; Bakker, Dorothee C. E.; Balmonte, John Paul; Barry, Kevin; Bertilsson, Stefan; Boulton, William; Bowman, Jeff; Bozzato, Deborah; Bratbak, Gunnar; Buck, Moritz; Campbell, Robert G.; Castellani, Giulia; Chamberlain, Emelia J.; Chen, Jianfang; Chierici, Melissa; Cornils, Astrid; Creamean, Jessie; Damm, Ellen; Dethloff, Klaus; Droste, Elise S.; Ebenhöh, Oliver; Eggers, Sarah Lena; Engel, Anja; Flores, Hauke; Fransson, Agneta; Frickenhaus, Stephan; Gardner, Jessie; Gelfman, Cecilia E.; Granskog, Mats; Graeve, Martin; Havermans, Charlotte; Heuzé, Céline; Hildebrandt, Nicole; Hill, Thomas C. J.; Hoppema, Mario; Immerz, Antonia; Jin, Haiyan; Koch, Boris P.; Kong, Xianyu; Kraberg, Alexandra C.; Lan, Musheng; Lange, Benjamin Allen; Larsen, Aud; Lebreton, Benoit; Leu, Eva Susanne; Loose, Brice; Maslowski, Wieslaw; Mavis, Camille; Metfies, Katja; Mock, Thomas; Müller, Oliver; Marcel, Nicolaus; Niehoff, Barbara; Nomura, Daiki; Nöthig, Eva-Maria; Oggier, Marc; Oldenburg, Ellen; Olsen, Lasse Mork; Peeken, Ilka; Perovich, Donald K.; Popa, Ovidiu; Rabe, Benjamin; Ren, Jian; Rex, Markus; Rinke, Annette; Rokitta, Sebastian; Rost, Björn; Sakinan, Serdar S.; Salganik, Evgenii; Schaafsma, Fokje L.; Schäfer, Hendrik; Schmidt, Katrin; Shoemaker, Katyanne; Shupe, Matthew D.; Snoeijs-Leijonmalm, Pauline; Stefels, Jacqueline; Svenson, Anders; Tao, Ran; Sinhué, Torres-Valdés; Torstensson, Anders; Toseland, Andrew; Ulfsbo, Adam; Leeuwe, Maria A. van; Vortkamp, Martina; Webb, Alison L.; Zhuang, Yanpei; Gradinger, Rolf Rudolf (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-08-21)
      The international and interdisciplinary sea-ice drift expedition “The Multidisciplinary drifting Observatory for the Study of Arctic Climate” (MOSAiC) was conducted from October 2019 to September 2020. The aim of MOSAiC was to study the interconnected physical, chemical, and biological characteristics and processes from the atmosphere to the deep sea of the central Arctic system. The ecosystem team ...
    • Governance for Earth system tipping points – A research agenda 

      Milkoreit, Manjana; Boyd, Emily; Constantino, Sara M.; Hausner, Vera Helene; Hessen, Dag Olav; Kääb, Andreas; McLaren, Duncan; Nadeau, Christina; O'Brien, Karen; Parmentier, Frans-Jan W.; Rotbarth, Ronny; Rødven, Rolf; Treichler, Désirée; Rowe, Elana Tovah Wilson; Yamineva, Yulia (Journal article; Tidsskriftartikkel, 2024-06-12)
      Tipping points in the Earth system could be passed within the Paris Agreement's temperature goal range (1.5°C–2°C). Tipping processes are a feature of complex Earth system dynamics that present major governance challenges not addressed by existing global governance institutions. The common governance toolkit is a poor match for dealing with tipping processes, especially non-linear change, and radical ...
    • Efficacy, persistence and residue levels of fungicides for Botrytis control in wild blueberry 

      Abbey, Joel; Percival, David; Jaakola, Laura Elina; Asiedu, Samuel K. (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-17)
      Botrytis blossom blight disease is one of the major challenges to wild blueberry production with annual losses frequently exceeding 20%. In this study, the effect of different fungicide treatments on Botrytis blight development and yield, as well as the mobility and persistence of these fungicides within flower tissues, and fruit of wild blueberries were evaluated under field conditions. This ...
    • Bacterioplankton taxa compete for iron along the early spring–summer transition in the Arctic Ocean 

      Puente-Sánchez, Fernando; Macías-Pérez, Luis Alberto; Campbell, Karley Lynn; Royo-Llonch, Marta; Balagué, Vanessa; Sánchez, Pablo; Tamames, Javier; Mundy, Christopher John; Pedrós-Alió, Carlos (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-06-18)
      Microbial assemblages under the sea ice of the Dease Strait, Canadian Arctic, were sequenced for metagenomes of a small size fraction (0.2–3 μm). The community from early March was typical for this season, with Alpha- and Gammaproteobacteria as the dominant taxa, followed by Thaumarchaeota and Bacteroidetes. Toward summer, Bacteroidetes, and particularly the genus Polaribacter, became increasingly ...
    • Mapping Potential Timing of Ice Algal Blooms From Satellite 

      Stroeve, J.C.; Veyssiere, G.; Nab, C.; Light, B.; Perovich, D.; Laliberté, J.; Campbell, Karley Lynn; Landy, Jack Christopher; Mallett, Robbie David Christopher; Barrett, A; Liston, G.E.; Haddon, A.; Wilkinson, J. (Journal article; Tidsskriftartikkel, 2024-04-17)
      As Arctic sea ice and its overlying snow cover thin, more light penetrates into the ice and upper ocean, shifting the phenology of algal growth within the bottom of sea ice, with cascading impacts on higher trophic levels of the Arctic marine ecosystem. While field data or autonomous observatories provide direct measurements of the coupled sea ice-algal system, they are limited in space and time. ...
    • Path analysis reveals combined winter climate and pollution effects on the survival of a marine top predator 

      Layton-Matthews, Kate; Erikstad, Kjell E.; Sandvik, Hanno; Ballesteros, Manuel; Hodges, Kevin; Mesquita, Michel d. S.; Reiertsen, Tone Kristin; Yoccoz, Nigel Gilles; Bustnes, Jan Ove (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-08-06)
      Marine ecosystems are experiencing growing pressure from multiple threats caused by human activities, with far-reaching consequences for marine food webs. Determining the effects of multiple stressors is complex, in part, as they can affect different aspects of biological organisation (behaviour, individual traits and demographic rates). Determining the combined effects of stressors, through different ...
    • The Eurasian Arctic Ocean along the MOSAiC drift in 2019–2020: An interdisciplinary perspective on physical properties and processes 

      Schulz, Kirstin; Koenig, Zoe Charlotte; Muilwijk, Morven; Bauch, Dorotea; Hoppe, Clara J.M.; Droste, Elise S.; Hoppmann, Mario; Chamberlain, Emelia J.; Laukert, Georgi; Stanton, Tim; Quintanilla-Zurita, Alejandra; Fer, Ilker; Heuzé, Céline; Karam, Salar; Mieruch-Schnülle, Sebastian; Baumann, Till Martin; Vredenborg, Myriel; Tippenhauer, Sandra; Granskog, Mats (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-07-05)
      The Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC, 2019–2020), a year-long drift with the Arctic sea ice, has provided the scientific community with an unprecedented, multidisciplinary dataset from the Eurasian Arctic Ocean, covering high atmosphere to deep ocean across all seasons. However, the heterogeneity of data and the superposition of spatial and temporal ...
    • Panel-based assessment of ecosystem condition as a platform for adaptive and knowledge driven management 

      Jepsen, Jane Uhd; Arneberg, Per; Ims, Rolf Anker; Siwertsson, Anna; Yoccoz, Nigel Gilles; Fauchald, Per; Pedersen, Åshild Ønvik; van der Meeren, Gro Ingleid; von Quillfeldt, Cecilie H. (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-09-13)
      Ecosystems are subjected to increasing exposure to multiple anthropogenic drivers. This has led to the development of national and international accounting systems describing the condition of ecosystems, often based on few, highly aggregated indicators. Such accounting systems would benefit from a stronger theoretical and empirical underpinning of ecosystem dynamics. Operational tools for ecosystem ...
    • Herbivore diversity effects on Arctic tundra ecosystems: a systematic review 

      Barbero-Palacios, Laura; Barrio, Isabel C.; García Criado, Mariana; Kater, Ilona; Petit Bon, Matteo; Kolari, Tiina H. M.; Bjørkås, Ragnhild; Trepel, Jonas; Lundgren, Erick; Björnsdóttir, Katrín; Hwang, Bernice C.; Bartra Cabre, Laura; Defourneaux, Mathilde; Ramsay, Jennifer; Lameris, Thomas K.; Leffler, A. Joshua; Lock, Janine G.; Kuoppamaa, Mari S.; Kristensen, Jeppe A.; Bjorkman, Anne D.; Myers-Smith, Isla; Lecomte, Nicolas; Axmacher, Jan C.; Den Herder, Michael; Pagneux, Emmanuel P.; Skarin, Anna; Sokolova, Natalia; Windirsch, Torben; Wheeler, Helen Claire; Serrano, Emmanuel; Virtanen, Tarmo; Hik, David S.; Kaarlejärvi, Elina; Speed, James David Mervyn; Soininen, Eeva M; Gilg, Olivier (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-25)
      Background Northern ecosystems are strongly influenced by herbivores that differ in their impacts on the eco‑ system. Yet the role of herbivore diversity in shaping the structure and functioning of tundra ecosystems has been overlooked. With climate and land-use changes causing rapid shifts in Arctic species assemblages, a better under‑ standing of the consequences of herbivore diversity changes for ...
    • Changing species dominance patterns of Boreal-Arctic heathlands: evidence of biotic homogenization 

      Bråthen, Kari Anne; Tuomi, Maria Wilhelmina; Kapfer, Jutta; Böhner, Hanna; Maliniemi, Tuija (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-29)
      Heathlands are extensive systems often dominated by slow-growing and long-lived woody plants. These systems require longer-term studies to capture if and how they are changing over time. In 2020, we resurveyed species richness and cover of vascular plant communities in 139 heathlands along the coastline of northern Fennoscandia, first surveyed during 1965–1975. The first survey included six ...
    • Camera traps reveal seasonal variation in activity and occupancy of the Alpine mountain hare Lepus timidus varronis 

      Bison, Marjorie; Yoccoz, Nigel Gilles; Carlson, Bradley Z.; Bayle, Arthur; Delestrade, Anne (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-01)
      Mountain hare is a cold-adapted species threatened by climate change, but despite its emblematic nature, our understanding of the causes of population decline remains limited. Camera traps are increasingly used in ecology as a tool for monitoring animal populations at large spatial and temporal scales. In mountain environments where field work is constrained by difficult access and harsh ...
    • Taxonomic and functional-trait metrics track recovery of demersal fish and shrimp communities following system collapse 

      Wiedmann, Magnus Aune; Ramasco, Virginie; Wells, Nadine; Warren, Margaret; Cyr, Frédéric; Pedersen, Eric J.; Koen-Alonso, Mariano; Eriksen, Elena; Primicerio, Raul; Lindstrøm, Ulf Ove; Renaud, Paul Eric (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-11)
      Monitoring programs that integrate both structural and functional ecosystem components play integral roles in ecosystem management and conservation planning. In the early 1990’s, the marine ecosystem of the waters surrounding Newfoundland and Labrador (NL) underwent a regime shift. Several demersal and pelagic fish stocks collapsed simultaneously, and this had significant ecological and socioeconomic ...
    • Low spatial habitat overlap of herbivores in the High Arctic tundra 

      Ravolainen, Virve; Paulsen, Ingrid Marie Garfelt; Eischeid, Isabell; Forbey, Jennifer Sorensen; Fuglei, Eva; Hájek, Tomás; Hansen, Brage Bremset; Loe, Leif Egil; Macek, Petr; Madsen, Jesper; Soininen, Eeva M; Speed, James David Mervyn; Stien, Audun; Tømmervik, Hans; Pedersen, Åshild Ønvik (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-01-04)
      Herbivores play a crucial role in shaping tundra ecosystems through their effects on vegetation, nutrient cycling, and soil abiotic factors. Understanding their habitat use, co-occurrence, and overlap is therefore essential for informing ecosystem-based management and conservation. In the High Arctic, only a marginal proportion of the land area is vegetated, and climate change is impacting ...
    • Necropsy findings, meat control pathology and causes of loss in semi-domesticated reindeer (Rangifer tarandus tarandus) in northern Norway 

      Mørk, Torill; Eira, Henrik Isaksen; Rødven, Rolf; Nymo, Ingebjørg Helena; Blomstrand, Berit Marie; Guttormsen, Sandra; Olsen, Line; Davidson, Rebecca K. (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-01-04)
      Background Reindeer herding in Norway is based on traditional Sámi pastoralism with the animals free ranging throughout the year. The animals move over large areas in varying terrain and often in challenging weather conditions. Winter crises, such as difficult grazing conditions caused by icing or large amounts of snow, are survival bottlenecks for reindeer. Calves are especially vulnerable, and ...
    • Seasonal acoustic presence of marine mammals at the South Orkney Islands, Scotia Sea 

      Åsvestad, Linn; Ahonen, Heidi; Menze, Sebastian; Lowther, Andrew; Lindstrøm, Ulf Ove; Krafft, Bjørn Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-01-03)
      Increased knowledge about marine mammal seasonal distribution and species assemblage from the South Orkney Islands waters is needed for the development of management regulations of the commercial fishery for Antarctic krill (Euphausia superba) in this region. Passive acoustic monitoring (PAM) data were collected during the autumn and winter seasons in two consecutive years (2016, 2017), which ...
    • A versatile, semi-automated image analysis workflow for time-lapse camera trap image classification 

      Celis, Gerardo; Ungar, Peter; Sokolov, Aleksandr; Soininen, Eeva M; Böhner, Hanna; Liu, Desheng; Gilg, Olivier; Fufachev, Ivan; Pokrovskaya, Olga; Ims, Rolf Anker; Zhou, Wenbo; Morris, Dan; Ehrich, Dorothee (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-26)
      Camera traps are a powerful, practical, and non-invasive method used widely to monitor animal communities and evaluate management actions. However, camera trap arrays can generate thousands to millions of images that require significant time and effort to review. Computer vision has emerged as a tool to accelerate this image review process. We propose a multi-step, semi-automated workflow which ...
    • Survey report (Part 2) from the joint Norwegian/Russian Ecosystem Survey in the Barents Sea and the adjacent waters August-October 2023 — Marine environment, Mesozooplankton, Commercial Demersal Fish, Fish Biodiversity, Commercial Shellfish, Benthic Invertebrate Community, Marine Mammals and Seabirds 

      Prozorkevich, Dmitri; Eriksen, Elena; Karlson, Stine; Trofimov, Aleksander; Ingvaldsen, Randi Brunvær; Grøsvik, Bjørn Einar; Prokhorova, Tatiana; Klepikovskiy, Roman; Bagøien, Espen; Johannesen, Edda; Bogstad, Bjarte; Wiedmann, Magnus Aune; Krivosheya, Pavel; Prokopchuk, Irina; Windsland, Kristin; Russkikh, Alexey; Wienerroither, Rupert; Filin, Anatoly; Zimmermann, Fabian; Hjelset, Ann Merete; Danielsen, Hanna Ellerine Helle; Bakanev, sergei; Stesko, Aleksei; Jørgensen, Lis Lindal; Blinova, Daria; Boehm, Frederike; Øien, Nils Inge; Strelkova, Natalia; Kudrayashova, Alexander; Fauchald, Per; Ollus, Victoria Marja Sofia; Ford, Jonathan; Elton, Gary (Research report; Forskningsrapport, 2024)
      The aim of the joint Norwegian/Russian ecosystem survey in the Barents Sea and adjacent waters, August-October (BESS) is to monitor the status and changes of in the Barents Sea ecosystem. The survey has since 2004 been conducted annually in the autumn, as a collaboration between the IMR in Norway and the Polar Branch of VNIRO (PINRO) in Russia. The general survey plan, tasks, and sailings routes are ...
    • Effects of resource availability and interspecific interactions on Arctic and red foxes' winter use of ungulate carrion in the Fennoscandian low-Arctic tundra 

      Lacombe, Simon; Ims, Rolf Anker; Yoccoz, Nigel Gilles; Kleiven, Eivind Flittie; Antunes Lopes Da Silva Nicolau, Pedro Guilherme; Ehrich, Dorothee (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-01)
      In the Arctic tundra, predators face recurrent periods of food scarcity and often turn to ungulate carcasses as an alternative food source. As important and localized resource patches, carrion promotes co-occurrence of different individuals, and its use by predators is likely to be affected by interspecific competition. We studied how interspecific competition and resource availability impact ...