Now showing items 5026-5045 of 5086

    • Why don't all species overexploit? 

      Vuorinen, Katariina Elsa Maria; Oksanen, Tarja Maarit; Oksanen, Lauri; Vuorisalo, Timo; Speed, James David Mervyn (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-14)
      Overexploitation of natural resources is often viewed as a problem characteristic of only the human species. However, any species could evolve a capacity to overexploit its essential resources through natural selection and competition, even to the point of resource collapse. Here, we describe the processes that potentially lead to overexploitation and synthesize what is known about overexploitation ...
    • Why enter the church on holiday? Tourist encounters with the Basilica of Santa Maria in Trastevere, Rome 

      Smørvik, Kjersti Karijord (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-17)
      The tourist is constantly seeking out new experiences, and there is a growing interest in experiences at religious sites. This article examines tourists’ church experience, and what meaning it gives, and what motivates tourists to visit a church on their holiday. With a particular focus on the individual’s experience creation, the article looks into the tourist’s personal experience inside a church, ...
    • Why Not Use the Sea? A Shared Value Approach to Sustainable Value Creation When Using Carbon Dioxide as a Valuable Resource in Manufacturing 

      Agwu, Ukeje; Oftedal, Elin Merethe; Bertella, Giovanna (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-20)
      Interest on the creation of sustainable value has recently increased as a response to global issues caused by traditional business-as-usual logic. Indeed, corporations pursuing profits and competitive advantage at the expense of social and environmental resources has become a source of pressing concern and institutionalized unsustainability needs to be reversed. To create sustainable value, a paradigm ...
    • Why potential entry may increase platform sponsors' profit 

      Foros, Øystein; Sand, Jan Yngve; Kind, Hans Jarle (Working paper; Arbeidsnotat, 2005-09)
      In this paper we analyze the incentives for platform sponsors to open up their networks for independent rivals. We show that open access may increase the platform sponsors’ profit levels and enhance quality improving investments.
    • Why Rudolph's nose is red: observational study 

      Ince, Can; van Kuijen, Anne-Marie; Milstein, Dan M J; Yürük, Koray; Folkow, Lars; Fokkens, Wytske J; Blix, Arnoldus S (Journal article; Tidsskriftartikkel, 2012-12-17)
      Objective To characterise the functional morphology of the nasal microcirculation in humans in comparison with reindeer as a means of testing the hypothesis that the luminous red nose of Rudolph, one of the most well known reindeer pulling Santa Claus’s sleigh, is due to the presence of a highly dense and rich nasal microcirculation.<p> <p>Design Observational study.<p> <p>Setting Tromsø, ...
    • Wicked problems: management complexities in the Atlantic bluefin tuna fisheries 

      Lunndal, Ingvild (Master thesis; Mastergradsoppgave, 2012-05-15)
      This study examines the complexities of achieving sufficient management measures for the Atlantic Bluefin Tuna, with an attempt to specify failure and shortcomings within the management system. The key to the solution is embedded in man-made governance systems and legal frameworks. With this thesis I will try to unfold the complexities of governance systems, the legal framework of fisheries ...
    • A Widely Distributed Thraustochytrid Parasite of Diatoms Isolated from the Arctic Represents a gen. and sp. nov. 

      Hassett, Brandon (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-06)
      A unicellular, heterotrophic, eukaryotic parasite was isolated from nearshore Arctic marine sediment in association with the diatom <i>Pleurosigma</i> sp. The parasite possessed ectoplasmic threads that could penetrate diatom frustules. Healthy and reproducing <i>Pleurosigma</i> cultures would begin to collapse within a week following the introduction of this parasite. The parasite (2–10 μm diameter) ...
    • Widely rhythmic transcriptome in Calanus finmarchicus during the high Arctic summer solstice period 

      Payton, Laura; Hüppe, Lukas; Noirot, Celine; Hoede, Claire; Last, Kim; Wilcockson, David; Ershova, Elizaveta; Valière, Sophie; Meyer, Bettina (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-10)
      Solar light/dark cycles and seasonal photoperiods underpin daily and annual rhythms of life on Earth. Yet, the Arctic is characterized by several months of permanent illumination (“midnight sun”). To determine the persistence of 24h rhythms during the midnight sun, we investigated transcriptomic dynamics in the copepod <i>Calanus finmarchicus</i> during the summer solstice period in the Arctic, with ...
    • Widespread soil bacterium that oxidizes atmospheric methane 

      Tveit, Alexander Tøsdal; Hestnes, Anne Grethe; Robinson, Serina Lee; Schintlmeister, Arno; Dedysh, Svetlana N; Jehmlich, Nico; Bergen, Martin von; Herbold, Craig; Wagner, Michael; Richter, Andreas; Svenning, Mette Marianne (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-04-08)
      Increasing atmospheric methane concentrations contribute significantly to global warming. The only known biological sink for atmospheric methane is oxidation by methane oxidizing bacteria (MOB). Due to the lack of pure cultures, the physiology and metabolic potential of MOB that oxidize atmospheric methane remains a mystery. Here, we report on isolation and characterization of a MOB that can grow ...
    • Wild and Farmed Arctic Charr as a Tourism Product in an Era of Climate Change 

      Helgadóttir, Guðrún; Renssen, Hans; Olk, Tom Robin; Oredalen, Tone Jøran; Haraldsdóttir, Laufey; Skúlason, Skúli; Thorarensen, Helgi (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-12)
      The topic investigated is the social-ecological system of Arctic charr (Salvelinus alpinus) fishing and aquaculture as a tourism product in an era of climate change. Arctic charr is a resilient salmonid species that was traditionally an important part of the sustenance economy in Arctic and Subarctic communities as a source of fresh food throughout the year. Arctic charr populations have declined ...
    • Wildlife tourism through the co-creation lens 

      Bertella, Giovanna; Fumagalli, Maddalena; Vanessa, Williams-Grey (Journal article; Tidsskriftartikkel, 2019-05-03)
      This study reflects on the conceptualisation of wild animals as co-creators. Its purpose is to encourage reflection about the role of animals in wildlife tourism. Therefore, to this end – and in the belief that diversity and creativity are important elements in critical thinking – the study was developed by a research team with diverse professional backgrounds. It adopts a fictional methodological ...
    • Will borealization of Arctic tundra herbivore communities be driven by climate warming or vegetation change? 

      Speed, James David Mervyn; Chimal-Ballesteros, J. Adrian; Martin, Michael D.; Barrio, Isabel C.; Vuorinen, Katariina Elsa Maria; Soininen, Eeva M (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-30)
      Poleward shifts in species distributions are expected and frequently observed with a warming climate. In Arctic ecosystems, the strong warming trends are associated with increasing greenness and shrubification. Vertebrate herbivores have the potential to limit greening and shrub advance and expansion on the tundra, posing the question of whether changes in herbivore communities could partly mediate ...
    • Will borealization of Arctic tundra herbivore communities be driven by climate warming or vegetation change? 

      Speed, James David Mervyn; Chimal Ballesteros, Jesus Adrian; Martin, Michael David; Barrio, Isabel C.; Vuorinen, Katariina Elsa Maria; Soininen, Eeva Marjatta (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-30)
      Poleward shifts in species distributions are expected and frequently observed with a warming climate. In Arctic ecosystems, the strong warming trends are associated with increasing greenness and shrubification. Vertebrate herbivores have the potential to limit greening and shrub advance and expansion on the tundra, posing the question of whether changes in herbivore communities could partly mediate ...
    • Willingness to pay for mangrove restoration to reduce the climate change impacts on ecotourism in Rekawa coastal wetland, Sri Lanka 

      Salpage, Nesha Dushani; Aanesen, Margrethe; Armstrong, Claire W. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-03)
      This study investigates tourist preferences and willingness to pay (WTP) for restoration of mangroves to reduce the effects of climate change (CC) on ecotourism at Rekawa coastal wetland, Sri Lanka, using a double bounded discrete choice elicitation format in a contingent valuation method. The survey also included socio-economic, demographic, and attitudinal characteristics of respondents. The ...
    • Willingness to pay for unfamiliar public goods: Preserving cold-water coral in Norway 

      Aanesen, Margrethe; Armstrong, Claire W.; Czajkowski, Mikolaj; Falk-Andersson, Jannike; Hanley, Nick; Navrud, Ståle (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-02-17)
      The world's largest concentration of cold-water coral (CWC) is found off the Norwegian coast. Most CWC discoveries are recent, posing new challenges for Norwegian coastal and fishery authorities regarding the management of deep-sea resources. Scientific knowledge of CWC is limited, and many citizens have not even heard about them. This creates problems for the application of the stated preference ...
    • Willingness to pay to protect cold water corals 

      Armstrong, Claire W.; Aanesen, Margrethe; van Rensburg, Thomas; Sandorf, Erlend Dancke (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-08-16)
      There is increasing pressure to use currently untapped resources in the deep sea, raising questions regarding ecosystem service trade‐offs in these often unknown areas. We assessed the trade‐offs between protection of cold‐water coral reefs and economic activities, such as fisheries and petroleum extraction, through a survey of a representative sample of the populations of Norway and Ireland. ...
    • Winter behaviour of riverine anadromous Arctic charr and sea trout in northern Norway 

      Jensen, Jenny Lovisa Alexandra (Master thesis; Mastergradsoppgave, 2008-05)
      Based on earlier migration studies of lake-dwelling anadromous Arctic charr Salvelinus alpinus (L.) and sea trout Salmo trutta L. in northern Norway, both species are believed to solely overwinter in fresh water and spend only one to three months in the sea during summer. This is an assumption upon which all current management of the species in the area is based, although no studies have focused on ...
    • Winter quarters of wetland ground beetles (Coleoptera, Carabidae) in South Scandinavia 

      Andersen, Johan (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      Sites at various distances from eutrophic and mesotrophic lakes and fens on the island Öland in southern Sweden were systematically surveyed in summer (May–August) and autumn (late September–October) to elucidate the hibernation sites of wetland carabid beetles. Thirty-five of 47 wetland species were found in their winter quarters. In areas ≤50 m from the lakes and fens, the observed as well as the ...
    • Winters are changing: snow effects on Arctic and alpine tundra ecosystems 

      Rixen, Christian; Høye, Toke Thomas; Macek, Petr; Aerts, Rien; Alatalo, Juha; Andeson, Jill; Arnold, Pieter; Barrio, Isabel C.; Bjerke, Jarle W.; Björkman, Mats P.; Blok, Daan; Blume-werry, Gesche; Boike, Julia; Bokhorst, Stef; Carbognani, Michele; Christiansen, Casper Tai; Convey, Peter; Cooper, Elisabeth J.; Cornelissen, J. Hans C.; Coulson, Stephen; Dorrepaal, Ellen; Elberling, Bo; Elmendorf, Sarah; Elphinstone, Cassandra; Forte, T'ai Gladys Whittingham; Frei, Esther R.; Geange, Sonya Rita; Gehrmann, Friederike; Gibson, Casey; Grogan, Paul; Rechsteiner, Aud Helen Halbritter; Harte, John; Henry, Greg H.R.; Inouye, David W.; Irwin, Rebecca; Jespersen, Gus; Jónsdóttir, Ingibjörg Svala; Jung, Ji Young; Klinges, David H.; Kudo, Gaku; Lämsä, Juho; Lee, Hanna; Lembrechts, Jonas; Lett, Signe; Lynn, Joshua Scott; Mann, Hjalte Mads; Mastepanov, Mikhail; Morse, Jennifer; Myers-Smith, Isla; Olofsson, Johan; Semenchuk, Philipp; Vandvik, Vigdis (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-18)
      Snow is an important driver of ecosystem processes in cold biomes. Snow accumulation determines ground temperature, light conditions and moisture availability during winter. It also affects the growing season’s start and end, and plant access to moisture and nutrients. Here, we review the current knowledge of the snow cover’s role for vegetation, plant-animal interactions, permafrost conditions, ...
    • Within and between breeding-season changes in contaminant occurrence and body condition in the Antarctic breeding south polar skua 

      Midthaug, Hilde Karin; Hitchcock, Daniel James; Bustnes, Jan Ove; Polder, Anuschka; Descamps, Sebastien; Tarroux, Arnaud; Soininen, Eeva M; Borgå, Katrine (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-24)
      The Antarctic ecosystem represents a remote region far from point sources of pollution. Still, Antarctic marine predators, such as seabirds, are exposed to organohalogen contaminants (OHCs) which may induce adverse health effects. With increasing restrictions and regulations on OHCs, the levels and exposure are expected to decrease over time. We studied south polar skua (<i>Catharacta maccormicki</i>), ...