Blar i Bergen Open Research Archive på forfatter "Larsen, Aud"
-
Seasonal dynamics of haptophytes and dsDNA algal viruses suggest complex virus-host relationship
Johannessen, Torill Vik; Larsen, Aud; Bratbak, Gunnar; Pagarete, António; Edvardsen, Bente; Egge, Elianne Dunthorn; Sandaa, Ruth-Anne (Peer reviewed; Journal article, 2017-04-20)Viruses influence the ecology and diversity of phytoplankton in the ocean. Most studies of phytoplankton host–virus interactions have focused on bloom-forming species like Emiliania huxleyi or Phaeocystis spp. The role of ... -
A simple adjustment to test reliability of bacterivory rates derived from the dilution method
Pree, Bernadette; Kuhlisch, Constanze; Pohnert, Georg; Sazhin, Andrey; Jakobsen, Hans Henrik; Paulsen, Maria Lund; Frischer, Marc E.; Stoecker, Diane K.; Nejstgaard, Jens C.; Larsen, Aud (Peer reviewed; Journal article, 2016-02)Quantification of grazing losses of marine heterotrophic bacteria is critical for understanding nutrient and carbon pathways in aquatic systems. The dilution method is a commonly used experimental approach for quantifying ... -
Simple models combining competition, defence and resource availability have broad implications in pelagic microbial food webs
Våge, Selina; Bratbak, Gunnar; Egge, Jorun Karin; Heldal, Mikal; Larsen, Aud; Norland, Svein; Paulsen, Maria Lund; Pree, Bernadette; Sandaa, Ruth-Anne; Skjoldal, Evy Foss; Tsagaraki, Tatiana Margo; Øvreås, Lise; Thingstad, T. Frede (Peer reviewed; Journal article, 2018-09)In food webs, interactions between competition and defence control the partitioning of limiting resources. As a result, simple models of these interactions contain links between biogeochemistry, diversity, food web structure ... -
Still Arctic? — The changing Barents Sea
Gerland, Sebastian; Ingvaldsen, Randi Brunvær; Reigstad, Marit; Sundfjord, Arild; Bogstad, Bjarte; Chierici, Melissa; Hop, Haakon; Renaud, Paul Eric; Smedsrud, Lars Henrik; Stige, Leif Christian; Årthun, Marius; Berge, Jørgen; Bluhm, Bodil Annikki Ulla Barbro; Borgå, Katrine; Bratbak, Gunnar; Divine, Dmitry V; Eldevik, Tor; Eriksen, Elena; Fer, Ilker; Fransson, Agneta; Gradinger, Rolf Rudolf; Granskog, Mats A.; Haug, Tore; Husum, Katrine; Johnsen, Geir; Jonassen, Marius Opsanger; Jørgensen, Lis Lindal; Kristiansen, Svein; Larsen, Aud; Lien, Vidar Surén; Lind, Sigrid; Lindstrøm, Ulf Ove; Mauritzen, Cecilie; Melsom, Arne; Mernild, Sebastian H.; Müller, Malte; Nilsen, Frank; Primicerio, Raul; Søreide, Janne; van der Meeren, Gro Ingleid; Wassmann, Paul (Journal article; Peer reviewed, 2023)The Barents Sea is one of the Polar regions where current climate and ecosystem change is most pronounced. Here we review the current state of knowledge of the physical, chemical and biological systems in the Barents Sea. ... -
Synechococcus in the Atlantic Gateway to the Arctic Ocean
Paulsen, Maria Lund; Doré, Hugo; Garczarek, Laurence; Seuthe, Lena; Müller, Oliver; Sandaa, Ruth-Anne; Bratbak, Gunnar; Larsen, Aud (Peer reviewed; Journal article, 2016-10-05)Increasing temperatures, with pronounced effects at high latitudes, have raised questions about potential changes in species composition, as well as possible increased importance of small-celled phytoplankton in marine ... -
Viral infection switches the balance between bacterial and eukaryotic recyclers of organic matter during coccolithophore blooms
Vincent, Flora; Gralka, Matti; Schleyer, Guy; Schatz, Daniella; Cabrera-Brufau, Miguel; Kuhlisch, Constanze; Sichert, Andreas; Vidal-Melgosa, Silvia; Mayers, Kyle; Barak-Gavish, Noa; Flores, J. Michel; Masdeu-Navarro, Marta; Egge, Jorun Karin; Larsen, Aud; Hehemann, Jan-Hendrik; Marrasé, Celia; Simó, Rafel; Cordero, Otto X.; Vardi, Assaf (Journal article; Peer reviewed, 2023)Algal blooms are hotspots of marine primary production and play central roles in microbial ecology and global elemental cycling. Upon demise of the bloom, organic carbon is partly respired and partly transferred to either ... -
Virus infection of Haptolina ericina and Phaeocystis pouchetii implicates evolutionary conservation of programmed cell death induction in marine haptophyte-virus interactions
Ray, Jessica Louise; Haramaty, Liti; Thyrhaug, Runar; Fredricks, Helen F.; Van Mooy, Benjamin A.S.; Larsen, Aud; Bidle, Kay D.; Sandaa, Ruth-Anne (Peer reviewed; Journal article, 2014-05-05)The mechanisms by which phytoplankton cope with stressors in the marine environment are neither fully characterized nor understood. As viruses are the most abundant entities in the global ocean and represent a strong ...