Now showing items 281-300 of 1521

    • iNaturalist as a tool in the study of tropical molluscs 

      Rosa, Rafael masson; Cavallari, Daniel caracanhas; Salvador, Rodrigo Brincalepe (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-05)
      Although terrestrial gastropods are remarkably diverse, our knowledge of them is still lacking, especially for species from the Global South. As such, new tools to help researchers collect data on these organisms are very welcome. With this in mind, we investigated Brazilian observations on iNaturalist to assess the feasibility of the data available on the platform as a basis for studies on the ...
    • Phylogenetic position of African punctoid snails (Stylommatophora, Punctoidea, Trachycystinae) 

      Salvador, Rodrigo Brincalepe (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-02)
      The punctoid land snail family Charopidae, as currently defined, is a paraphyletic assemblage of taxa with Gondwanan distribution. It is represented in Africa largely by the pinwheels (genus Trachycystis and allies) and afrodontas (genus Afrodonta and allies), as well as a few additional genera, such as Reticulapex, Pilula, and Helenoconcha. Herein, a Bayesian inference phylogenetic analysis (using ...
    • The Coordinated Action of MYB Activators and Repressors Controls Proanthocyanidin and Anthocyanin Biosynthesis in Vaccinium 

      Lafferty, Declan J.; Espley, Richard V.; Deng, Cecilia H; Dare, Andrew P.; Günther, Catrin S.; Jaakola, Laura; Karppinen, Katja; Boase, Murray R.; Wang, Lei; Luo, Henry; Allan, Andrew C.; Albert, Nick W. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-24)
      Vaccinium berries are regarded as “superfoods” owing to their high concentrations of anthocyanins, flavonoid metabolites that provide pigmentation and positively affect human health. Anthocyanin localization differs between the fruit of cultivated highbush blueberry (V. corymbosum) and wild bilberry (V. myrtillus), with the latter having deep red flesh coloration. Analysis of comparative ...
    • Publication practice in Taxonomy: Global inequalities and potential bias against negative results 

      Salvador, Rodrigo Brincalepe; Cavallari, Daniel caracanhas; Rands, Douglas; Tomotani, Barbara mizumo (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-01)
      There is broad recognition by practicing taxonomists that the field is going through a crisis, which has been dubbed the “taxonomic impediment”. There are many aspects involved in said crisis, but publication practices in taxonomy are often neglected or relegated to the backseat. We provide an initial foray into this topic via a worldwide survey with taxonomists, spanning all botanical and ...
    • Stress responses to repeated captures in a wild ungulate 

      Trondrud, Liv Monica; Ugland, Cassandra Regine; Ropstad, Erik; Loe, Leif Egil; Albon, Steve; Stien, Audun; Evans, Alina; Thorsby, Per Medbøe; Veiberg, Vebjørn; Irvine, R. Justin; Pigeon, Gabriel (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-29)
      While capture-mark-recapture studies provide essential individual-level data in ecology, repeated captures and handling may impact animal welfare and cause scientific bias. Evaluating the consequences of invasive methodologies should be an integral part of any study involving capture of live animals. We investigated short- and long-term stress responses to repeated captures within a winter on the ...
    • The root zone of graminoids: A niche for H2-consuming acetogens in a minerotrophic peatland 

      Meier, Anja B.; Oppermann, Sindy; Drake, Harold L.; Schmidt, Oliver (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-05)
      The importance of acetogens for H<sub>2</sub> turnover and overall anaerobic degradation in peatlands remains elusive. In the well-studied minerotrophic peatland fen Schlöppnerbrunnen, H<sub>2</sub>-consuming acetogens are conceptualized to be largely outcompeted by iron reducers, sulfate reducers, and hydrogenotrophic methanogens in bulk peat soil. However, in root zones of graminoids, fermenters ...
    • A dPCR Method for Quantitative Authentication of Wild Lingonberry (Vaccinium vitis-idaea) versus Cultivated American Cranberry (V. macrocarpon) 

      Karppinen, Katja; Avetisyan, Anna; Hykkerud, Anne Linn; Jaakola, Laura (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-19)
      Berries of the genus Vaccinium are highly valued health-beneficial superfoods, which are commonly subjected to adulteration and mixed with each other, or with other common berry species. A quantitative DNA-based method utilizing a chip-based digital polymerase chain reaction (dPCR) technique was developed for identifying and quantifying wild lingonberry (V. vitis-idaea) and cultivated American ...
    • Transcriptomes Suggest That Pinniped and Cetacean Brains Have a High Capacity for Aerobic Metabolism While Reducing Energy-Intensive Processes Such as Synaptic Transmission 

      Geßner, Cornelia; Krüger, Alena; Folkow, Lars; Fehrle, Wilfrid; Mikkelsen, Bjarni; Burmester, Thorsten (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-09)
      The mammalian brain is characterized by high energy expenditure and small energy reserves, making it dependent on continuous vascular oxygen and nutritional supply. The brain is therefore extremely vulnerable to hypoxia. While neurons of most terrestrial mammals suffer from irreversible damage after only short periods of hypoxia, neurons of the deep-diving hooded seal (Cystophora cristata) show ...
    • An ice-tethered buoy for fish and plankton research 

      Zolich, Artur Piotr; De La Torre, Pedro R.; Rodwell, Shane; Geoffroy, Maxime; Johnsen, Geir; Berge, Jørgen (Journal article; Tidsskriftartikkel, 2019-01-10)
      In this paper the authors present bio-acoustical icetethered platform for optical, physical and ecological sensors (POPE), i.e. an ice-tethered buoy, equipped with an AZFP scientific echosounder for fish and plankton research under the ice in the Arctic. The POPE enables remote transfer of large volume of environmental information using flying vehicles as data-mules. The presented prototype has been ...
    • Batch Experiments Demonstrating a Two-Stage Bacterial Process Coupling Methanotrophic and Heterotrophic Bacteria for 1-Alkene Production From Methane 

      Khanongnuch, Ramita; Mangayil, Rahul; Santala, Ville; Hestnes, Anne Grethe; Svenning, Mette Marianne; Rissanen, Antti J. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-19)
      Methane (CH<sub>4</sub>) is a sustainable carbon feedstock for value-added chemical production in aerobic CH<sub>4</sub>-oxidizing bacteria (methanotrophs). Under substrate-limited (e.g., oxygen and nitrogen) conditions, CH<sub>4</sub> oxidation results in the production of various short-chain organic acids and platform chemicals. These CH<sub>4</sub>-derived products could be broadened by ...
    • Light and freshwater discharge drive the biogeochemistry and microbial ecology in a sub-Arctic fjord over the Polar night 

      Vonnahme, Tobias R.; Klausen, Line; Bank, R.M.; Michellod, D.; Lavik, G.; Dietrich, Ulrike; Gradinger, Rolf Rudolf (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-30)
      The polar night has recently received increased attention as a surprisingly active biological season. Yet, polar night microbial ecology is a vastly understudied field. To identify the physical and biogeochemical parameters driving microbial activity over the dark season, we studied a sub-Arctic fjord system in northern Norway from autumn to early spring with detailed monthly sampling. We focused ...
    • Occurrence of emerging brominated flame retardants and organophosphate esters in marine wildlife from the Norwegian Arctic 

      Lippold, Anna; Harju, Mikael; Aars, Jon; Blévin, Pierre; Bytingsvik, Jenny; Gabrielsen, Geir W.; Kovacs, Kit M.; Lyche, Jan Ludwig; Lydersen, Christian; Rikardsen, Audun H.; Routti, Heli Anna Irmeli (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-10)
      To understand the exposure and potential sources of emerging brominated flame retardants (EBFR) and organophosphate esters (OPEs) in marine wildlife from the Norwegian Arctic, we investigated concentrations of EBFRs in 157 tissue samples from nine species of marine vertebrates and OPEs in 34 samples from three whale species. The samples, collected from a wide range of species with contrasting ...
    • The prevalence of camel brucellosis and associated risk factors: A global meta-epidemiological study 

      Dadar, Maryam; Omar, Sharaf S.; Shahali, Youcef; Fakhri, Yadolah; Godfroid, Jacques Xavier Leon; Khaneghah, Amin Mousavi (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-10)
      Camel brucellosis is a widespread and critical zoonotic infection caused by <i>Brucella abortus</i> and <i>Brucella meli-tensis</i> that negatively impact dairy and meat products.The current meta-analysis covers studies published over a course of 40 years, between 1 January 1980 and 1 April 2021, aiming to investigate the global prevalence of Brucella spp. in camels ...
    • Description and Spatial Modelling of Benthic Communities Distribution in the Canadian Arctic Archipelago 

      Dumais, Philippe-Olivier; Grant, Cindy; Bluhm, Bodil; De Montety, Laure; de Coeli, Lisa Treau; Tremblay, Jean-Éric; Archambault, Philippe (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-29)
      In the Arctic, sea ice loss has already transformed the dominant sources and periodicity of primary production in some areas, raising concerns over climate change impacts on benthic communities. Considered to be excellent indicators of environmental changes, benthic invertebrates play important roles in nutrient cycling, sediment oxygenation and decomposition. However, this biological component ...
    • Phylogeography and cryptic species structure of a locally adapted parasite in New Zealand 

      Feijen, Frida; Zajac, Natalia; Vorburger, Christoph; Costa, Isabel Blasco; Jokela, Jukka (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-21)
      The phylogeographic patterns of many taxa on New Zealand's South Island are characterized by disjunct distributions that have been attributed to Pleistocene climatic cycles and the formation of the Southern Alps. Pleistocene glaciation has been implicated in shaping the contemporary genetic differentiation between populations of the aquatic snail Potamopyrgus antipodarum. We investigated whether ...
    • Combined effects of temperature and fishing mortality on the Barents Sea ecosystem stability 

      Sivel, Elliot Manuarii; Planque, Benjamin; Lindstrøm, Ulf Ove; Yoccoz, Nigel (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-16)
      Temporal variability in abundance and composition of species in marine ecosystems results from a combination of internal processes, external drivers, and stochasticity. One way to explore the temporal variability in an ecosystem is through temporal stability, measured using the inverse of the coefficient of variation for biomass of single species. The effect of temperature and fisheries on the ...
    • Marine mammal hotspots across the circumpolar Arctic 

      Hamilton, Charmain D.; Lydersen, Christian; Aars, Jon; Acquarone, Mario; Atwood, Todd; Baylis, Alastair; Biuw, Martin; Boltunov, Andrei N.; Born, Erik W.; Boveng, Peter; Brown, Tanya M.; Cameron, Michael; Citta, John; Crawford, Justin; Dietz, Rune; Elias, Jim; Ferguson, Steven H.; Fisk, Aaron; Folkow, Lars; Frost, Kathryn J.; Glazov, Dmitri M.; Granquist, Sandra M.; Gryba, Rowenna; Harwood, Lois; Haug, Tore; Heide-Jørgensen, Mads Peter; Hussey, Nigel E.; Kalinek, Jimmy; Laidre, Kristin L.; Litovka, Dennis I.; London, Josh M.; Loseto, Lisa L.; MacPhee, Shannon; Marcoux, Marianne; Matthews, Cory J. D.; Nilssen, Kjell Tormod; Nordøy, Erling Sverre; O’Corry-Crowe, Greg; Øien, Nils Inge; Olsen, Morten Tange; Quakenbush, Lori; Rosing-Asvid, Aqqalu; Semenova, Varvara; Shelden, Kim E. W.; Shpak, Olga V.; Stenson, Garry; Storrie, Luke; Sveegaard, Signe; Teilmann, Jonas; Ugarte, Fernando; Von Duyke, Andrew L.; Watt, Cortney; Wiig, Øystein; Wilson, Ryan R.; Yurkowski, David J.; Kovacs, Kit M. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-11)
      Aim: Identify hotspots and areas of high species richness for Arctic marine mammals.<p><p> Location: Circumpolar Arctic. <p>Methods: A total of 2115 biologging devices were deployed on marine mammals from 13 species in the Arctic from 2005 to 2019. Getis-Ord Gi* hotspots were calculated based on the number of individuals in grid cells for each species and for phyloge-netic groups (nine pinnipeds, ...
    • The Influence of Sea Ice Cover and Atlantic Water Advection on Annual Particle Export North of Svalbard 

      Dybwad, Christine Schumann; Lalande, Catherine; Bodur, Yasemin V.; Henley, Sean; Cottier, Finlo Robert; Ershova, Elizaveta; Hobbs, Laura; Last, Kim S.; Dabrowska, Anna Maria; Reigstad, Marit (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-04)
      The Arctic Ocean north of Svalbard has recently experienced large sea ice losses and the increasing prominence of Atlantic water (AW) advection. To investigate the impact of these ongoing changes on annual particle export, two moorings with sequential sediment traps were deployed in ice-free and seasonally ice-covered waters on the shelf north (NSv) and east (ESv) of Svalbard, collecting sinking ...
    • Evidence of temperature control on mesopelagic fish and zooplankton communities at high latitudes 

      Chawarski, Julek; Klevjer, Thor A.; Coté, David; Geoffroy, Maxime (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-06)
      Across temperate and equatorial oceans, a diverse community of fish and zooplankton occupies the mesopelagic zone, where they are detectable as sound-scattering layers. At high latitudes, extreme day-night light cycles may limit the range of some species, while at lower latitudes communities are structured by dynamic ocean processes, such as temperature. Using acoustic and oceanographic ...
    • Parasitic plant small RNA analyses unveil parasite- specific signatures of microRNA retention, loss, and gain 

      Zangishei, Zahra; Annacondia, Maria Luz; Gundlach, Heidrun; Didriksen, Alena; Bruckmüller, Julien; Salari, Hooman; Krause, Kirsten; Martinez, German (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-21)
      Parasitism is a successful life strategy that has evolved independently in several families of vascular plants. The genera Cuscuta and Orobanche represent examples of the two profoundly different groups of parasites: one parasitizing host shoots and the other infecting host roots. In this study, we sequenced and described the overall repertoire of small RNAs from Cuscuta campestris and Orobanche ...