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  • Midnight Sun to Polar Night: A Model of Seasonal Light in the Barents Sea 

    Connan-McGinty, Stacey; Banas, Neil S.; Berge, Jørgen; Cottier, Finlo Robert; Grant, Stephen; Johnsen, Geir; Kopec, Tomasz Piotr; Porter, Marie; Mckee, David (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-20)
    Arctic marine ecosystems are strongly influenced by the extreme seasonality of light in the region. Accurate determination of light is essential for building a comprehensive understanding of the dynamics of animal and aquatic algae populations. Current approaches to underwater light field parameterisations rely upon shortwave radiation (300–3000 nm) estimates from satellites or surface radiometry ...
  • Flashing lights affect the photophysiology and expression of carotenoid and lipid synthesis genes in Nannochloropsis gaditana 

    Lima, Serena; Lokesh, Jep; Schulze, Peter S.C.; Wijffels, Rene Hubertus; Kiron, Viswanath; Scargiali, Francesca; Petters, Sebastian; Bernstein, Hans Christopher; Morales-Sanchez, Daniela (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-20)
    Nannochloropsis gaditana is a promising microalga for biotechnology. One of the strategies to stimulate its full potential in metabolite production is exposure to flashing lights. Here, we report how N. gaditana adapts to different flashing light regimes (5, 50, and 500 Hz) by changing its cellular physiology and the relative expression of genes related to critical cellular functions. We analyzed ...
  • An Artificial Neural Network Algorithm to Retrieve Chlorophyll a for Northwest European Shelf Seas from Top of Atmosphere Ocean Colour Reflectance 

    Hadjal, Madjid; Medina-Lopez, Encarni; Ren, Jinchang; Gallego, Alejandro; Mckee, David (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-12)
    Chlorophyll-a (Chl) retrieval from ocean colour remote sensing is problematic for relatively turbid coastal waters due to the impact of non-algal materials on atmospheric correction and standard Chl algorithm performance. Artificial neural networks (NNs) provide an alternative approach for retrieval of Chl from space and results for northwest European shelf seas over the 2002–2020 period are ...
  • Selective isolation of Arctic marine actinobacteria and a down-scaled fermentation and extraction strategy for identifying bioactive compounds 

    Schneider, Yannik Karl Heinz; Hagestad, Ole Christian; Li, Chun; Hansen, Espen Holst; Andersen, Jeanette Hammer (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-21)
    Actinobacteria are among the most prolific producers of bioactive secondary metabolites. In order to collect Arctic marine bacteria for the discovery of new bioactive metabolites, actinobacteria were selectively isolated during a research cruise in the Greenland Sea, Norwegian Sea and the Barents Sea. In the frame of the isolation campaign, it was investigated how different sample treatments, isolation ...
  • The Effect of Buffer Towing on Quality Aspects of Frozen and Thawed Atlantic Cod (Gadus Morhua) 

    Esaiassen, Margrethe; Jensen, Tonje Kristin; Eilertsen, Venil T.; Larsen, Roger B.; Olsen, Stein Harris; Tobiassen, Torbjørn Inge (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-16)
    A large part of the Northeast Atlantic cod caught with trawls is landed frozen, processed, and sold thawed. Many trawlers have adapted a fishing practice termed ‘buffer towing’, causing probability for poor exsanguination and fillet redness. Here, the effect of buffer towing upon color and hemoglobin concentration in cod loin section is studied, and the development of TVB-N during chilled storage ...
  • Gear modifications for bycatch reduction in the Bay of Biscay demersal trawl fishery 

    Cuende de Francisco, Elsa (Doctoral thesis; Doktorgradsavhandling, 2022-12-20)
    <p>Bottom trawl fisheries have great social and economic importance for coastal communities in the Basque Country. However, the activity of the demersal trawl fishery in the Bay of Biscay, which includes the coastline of the Basque country, can be compromised due to its multispecies nature, high proportion of unwanted species in the catch, and the increasingly strict legislation implemented aiming ...
  • Streptococcosis a Re-Emerging Disease in Aquaculture: Significance and Phytotherapy 

    Van Doan, Hien; Soltani, Mehdi; Leitão, Alexandra; Shafiei, Shafigh; Asadi, Sepideh; Lymbery, Alan J.; Ringø, Einar (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-16)
    Streptococcosis, particularly that caused by S. iniae and S. agalactiae, is a major re-emerging bacterial disease seriously affecting the global sustainability of aquaculture development. Despite a wide spread of the disease in aquaculture, few studies have been directed at assessing the in vitro antagonistic activity and in vivo efficacy of medicinal herbs and other plants against streptococcal ...
  • Temperature has a major effect on the cuticular wax composition of bilberry (Vaccinium myrtillus L.) fruit 

    Trivedi, Priyanka; Klavins, Linards; Hykkerud, Anne Linn; Kviesis, Jorens; Elferts, Didzis; Martinussen, Inger; Klavins, Maris; Karppinen, Katja; Häggman, Hely; Jaakola, Laura (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-20)
    Cuticle is the first layer protecting plants against external biotic and abiotic factors and is responsive to climatic factors as well as determined by genetic adaptations. In this study, the chemical composition of bilberry fruit cuticular wax was investigated through a latitudinal gradient from Latvia (56◦N 24◦E) through Finland (65◦N 25◦E) to northern Norway (69◦N 18◦E) in two seasons 2018 ...
  • Ice Cod Arctogadus glacialis (Peters, 1874) in Northeast Greenland—A First Sketch of Spatial Occurrence and Abundance 

    Karamushko, Oleg V.; Lynghammar, Arve; Schou Christiansen, Jørgen (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-17)
    Based on bottom trawl catches during the years 2002–2017, we present the first large-scale baseline on the spatial distribution and abundance of ice cod Arctogadus glacialis (Peters, 1874) in the fjords and on the shelf in Northeast Greenland (latitudes 70 °N–78 °N). Ice cod abundance peaked in the secluded sill fjords such as Bessel Fjord, Brede Fjord, Clavering Ø fjord system and Kong Oscar Fjord ...
  • Before Virtuous Practice. Public and Private Sector-Specific Preferences for Intuition and Deliberation in Decision-Making 

    Svenson, Frithiof; Steffen, Bianca; Harteis, Christian; Launer, Markus A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-26)
    Fast and intuitive thinking, as well as emotions, play a large role in decision-making. The sociology of wise practice within public administration also suggests that thinking preferences like the use of intuition form a cornerstone of public administrators’ virtuous practice. This contribution uses conceptual and theoretical resources from behavioral sciences and public administration to find out ...
  • Global patterns in endemicity and vulnerability of soil fungi 

    Tedersoo, Leho; Mikryukov, Vladimir; Zizka, Alexander; Bahram, Mohammad; Hagh-Doust, Niloufar; Anslan, Sten; Prylutskyi, Oleh; Delgado-Baquerizo, Manuel; Maestre, Fernando T.; Pärn, Jaan; Öpik, Maarja; Moora, Mari; Zobel, Martin; Espenberg, Mikk; Mander, Ülo; Khalid, Abdul Nasir; Corrales, Adriana; Agan, Ahto; Vasco-Palacios, Aída-M.; Saitta, Alessandro; Rinaldi, Andrea C.; Verbeken, Annemieke; Sulistyo, Bobby P.; Tamgnoue, Boris; Furneaux, Brendan; Ritter, Camila Duarte; Nyamukondiwa, Casper; Sharp, Cathy; Marín, César; Gohar, Daniyal; Klavina, Darta; Sharmah, Dipon; Dai, Dong Qin; Nouhra, Eduardo; Biersma, Elisabeth Machteld; Rähn, Elisabeth; Cameron, Erin K.; De Crop, Eske; Otsing, Eveli; Davydov, Evgeny A.; Albornoz, Felipe E.; Brearley, Francis Q.; Buegger, Franz; Zahn, Geoffrey; Bonito, Gregory; Hiiesalu, Inga; Barrio, Isabel C.; Heilmann-Clausen, Jacob; Ankuda, Jelena; Kupagme, John Y.; Maciá-Vicente, Jose G.; Fovo, Joseph Djeugap; Geml, József; Alatalo, Juha M.; Alvarez-Manjarrez, Julieta; Põldmaa, Kadri; Runnel, Kadri; Adamson, Kalev; Bråthen, Kari Anne; Pritsch, Karin; Tchan, Kassim I.; Armolaitis, Kęstutis; Hyde, Kevin D.; Newsham, Kevin K.; Panksep, Kristel; Lateef, Adebola A.; Tiirmann, Liis; Hansson, Linda; Lamit, Louis J.; Saba, Malka; Tuomi, Maria; Gryzenhout, Marieka; Bauters, Marijn; Piepenbring, Meike; Wijayawardene, Nalin; Yorou, Nourou S.; Kurina, Olavi; Mortimer, Peter E.; Meidl, Peter; Kohout, Petr; Nilsson, Rolf Henrik; Puusepp, Rasmus; Drenkhan, Rein; Garibay-Orijel, Roberto; Godoy, Roberto; Alkahtani, Saad; Rahimlou, Saleh; Dudov, Sergey V.; Põlme, Sergei; Ghosh, Soumya; Mundra, Sunil; Ahmed, Talaat; Netherway, Tarquin; Henkel, Terry W.; Roslin, Tomas; Nteziryayo, Vincent; Fedosov, Vladimir E.; Onipchenko, Vladimir G.; Yasanthika, W. A. Erandi; Lim, Young Woon; Soudzilovskaia, Nadejda A.; Antonelli, Alexandre; Kõljalg, Urmas; Abarenkov, Kessy (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-19)
    Fungi are highly diverse organisms, which provide multiple ecosystem services. However, compared with charismatic animals and plants, the distribution patterns and conservation needs of fungi have been little explored. Here, we examined endemicity patterns, global change vulnerability and conservation priority areas for functional groups of soil fungi based on six global surveys using a ...
  • Source rock geochemical assessment and estimation of TOC using well logs and geochemical data of Talhar Shale, Southern Indus Basin, Pakistan 

    Khalil Khan, Humayun; Ehsan, Muhsan; Ali, Abid; Amer, Muhammad Attique; Aziz, Haroon; Khan, Abdullah; Bashir, Yasir; Abu-Alam, Tamer; Abioui, Mohamed (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-01)
    Assessment of organic carbon content (TOC) by geophysical logs has been a challenging task in the formation evaluation of shale gas. This research is conducted to estimate the unconventional hydrocarbon (shale-gas) potential of Talhar Shale in the Southern Indus Basin (SIB), Pakistan. In this study, total organic carbon content (%) was estimated through well logs by different methods and then ...
  • The reciprocity of soil, soul and society: the heart of developing regenerative tourism activities 

    Mathisen, Line; Søreng, Siri Ulfsdatter; Lyrek, Trine (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-15)
    Purpose – The study aims to investigate how tourism actors’ methodologies fuel the development of regenerative activities anchored in the reciprocity of nature and humans directed at bringing well-being for all living beings.<p> <p>Design/methodology/approach – To shed light on micro-scale regenerative creation processes in tourism, the authors engage in co-creative case study research with the ...
  • Experimentally increased snow depth affects high Arctic microarthropods inconsistently over two consecutive winters 

    Krab, Eveline J.; Lundin, Erik J.; Coulson, Stephen James; Dorrepaal, Ellen; Cooper, Elisabeth J. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-27)
    Climate change induced alterations to winter conditions may afect decomposer organisms controlling the vast carbon stores in northern soils. Soil microarthropods are particularly abundant decomposers in Arctic ecosystems. We studied whether increased snow depth afected microarthropods, and if efects were consistent over two consecutive winters. We sampled Collembola and soil mites from a snow ...
  • Contrasting Life Traits of Sympatric Calanus glacialis and C. finmarchicus in a Warming Arctic Revealed by a Year-Round Study in Isfjorden, Svalbard 

    Hatlebakk, Maja K Viddal; Kosobokova, Ksenia N.; Daase, Malin; Søreide, Janne (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-12)
    The calanoid copepod Calanus glacialis dominates the mesozooplankton biomass in the Arctic shelf seas, but its smaller North Atlantic sibling Calanus finmarchicus is expanding northwards and may potentially replace it if the climate continues to warm. Here we studied the population structure, overwintering strategies, gonad maturation and egg production of C. glacialis and C. finmarchicus over ...
  • Seasonal mesozooplankton patterns and timing of life history events in high-arctic fjord environments 

    Søreide, Janne; Dmoch, Katarzyna; Blachowiak-Samolyk, Katarzyna; Trudnowska, Emilia; Daase, Malin (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-11)
    Seasonal patterns in mesozooplankton composition, vertical distribution, and timing of reproduction are challenging to study in the open sea due to ocean currents and mix of populations of different origins. Sill fjords, on the other hand, with restricted water exchange, are ideal locations for studying taxa- and community-specific adaptations to the prevailing environment. Here, we present ...
  • Synthesis and Antimicrobial Activity of Short Analogues of the Marine Antimicrobial Peptide Turgencin A: Effects of SAR Optimizations, Cys-Cys Cyclization and Lipopeptide Modifications 

    Dey, Hymonti; Simonovic, Danijela; Hagen, Ingrid Sofie Norberg-Schulz; Vasskog, Terje; Fredheim, Elizabeth G. Aarag; Blencke, Hans-Matti; Anderssen, Trude; Strøm, Morten B.; Haug, Tor (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-10)
    We have synthesised short analogues of the marine antimicrobial peptide Turgencin A from the colonial Arctic ascidian Synoicum turgens. In this study, we focused on a central, cationic 12-residue Cys-Cys loop region within the sequence. Modified (tryptophan- and arginine-enriched) linear peptides were compared with Cys-Cys cyclic derivatives, and both linear and Cys-cyclic peptides were N-terminally ...
  • Accounting for Uncertainties in Biodiversity Estimations: A New Methodology and Its Application to the Mesopelagic Sound Scattering Layer of the High Arctic 

    Herrmann, Bent; Cerbule, Kristine; Brčić, Jure; Grimaldo Vela, Eduardo Enrique; Geoffroy, Maxime; Daase, Malin; Berge, Jørgen (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-04-27)
    Measures of biological diversity (biodiversity) are important for monitoring the state of ecosystems. Several indices and methods are used to describe biodiversity from field observations. Marine faunal biodiversity is often quantified based on analysis of samples collected using a trawl during research surveys. To monitor spatial and temporal changes in biodiversity between surveys, samples are ...
  • Impact of a Dinophysis acuminata Bloom on the Copepod Acartia clausi: First Indications 

    Frangoulis, Constantin; Christou, Epaminondas D.; Varkitzi, Ioanna; Zervoudaki, Soultana; Maneiro, Isabel; Svensen, Camilla; Pagou, Kalliopi; Assimakopoulou, Georgia; Hatzianestis, Ioannis; Granéli, Edna (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-12)
    Faecal pellet production and content along with egg production of the dominant copepod species Acartia clausi were studied in the Thermaikos Gulf (NW Aegean Sea) during a prebloom and a bloom of the toxic dinoflagellate Dinophysis acuminata. Both faecal pellet production (6.8–8.6 ind<sup>−1</sup> d <sup>−1</sup> ) and egg production (15.8–47.6 ind<sup>−1</sup> d <sup>−1</sup> ) appeared unrelated ...
  • Environment Constrains Fitness Advantages of Division of Labor in Microbial Consortia Engineered for Metabolite Push or Pull Interactions 

    Beck, Ashley E.; Pintar, Kathryn; Schepens, Diana; Schrammeck, Ashley; Johnson, Timothy; Bleem, Alissa; Du, Martin; Harcombe, William R.; Bernstein, Hans Christopher; Heys, Jeffrey J.; Gedeon, Tomas; Carlson, Ross P. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-28)
    Fitness benefits from division of labor are well documented in microbial consortia, but the dependency of the benefits on environmental context is poorly understood. Two synthetic Escherichia coli consortia were built to test the relationships between exchanged organic acid, local environment, and opportunity costs of different metabolic strategies. Opportunity costs quantify benefits not realized ...

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