Forskningen min omfatter følgende tema

• Struktur og funksjon av marine mikrobielle økosystemer
• Karbon og næringsomsetting i mikrobielle næringsnett
• Mikrobiell populasjonsdynamikk og diversitet
• Den økologiske betydningen av virus i havet

Vitenskapelig artikkel

• Boulton, William; Salamov, A; Grigoriev, Igor V. et al. (2025). Metagenome-assembled-genomes recovered from the Arctic drift expedition MOSAiC. (ekstern lenke)
• Fong, Allison A.; Hoppe, Clara J. M.; Aberle-Malzahn, Nicole et al. (2024). Overview of the MOSAiC expedition: Ecosystem. (ekstern lenke)
• Hoppe, Clara J. M.; Fuchs, Niels; Notz, Dirk et al. (2024). Photosynthetic light requirement near the theoretical minimum detected in Arctic microalgae. (ekstern lenke)
• Amargant I Arumi, Marti; Müller, Oliver; Bodur, Yasemin Vicdan et al. (2023). Mellomårlige forskjeller i havisregime i det nordvestlige Barentshavet forårsaker store endringer i den pelagiske produksjonen og eksportmekanismene om sommeren. (ekstern lenke)
• Landor, Lotta Anni Ingeborg; Bratbak, Gunnar; Larsen, Aud et al. (2023). Differential toxicity of bioorthogonal non-canonical amino acids (BONCAT) in Escherichia coli. (ekstern lenke)
• Kohlbach, Doreen; Goraguer, Lucie; Bodur, Yasemin V. et al. (2023). Tidligere havissmelting forlenger den oligotrofe sommerperioden i Barentshavet med lav algebiomasse og vertikal fluks. (ekstern lenke)
• Thiele, Stefan; Vader, Anna; Thomson, Stuart et al. (2023). Seasonality of the bacterial and archaeal community composition of the Northern Barents Sea. (ekstern lenke)
• Thiele, Stefan; Vader, Anna; Thomson, Stuart et al. (2023). The summer bacterial and archaeal community composition of the northern Barents Sea. (ekstern lenke)
• Mock, Thomas; Boulton, William; Balmonte, John-Paul et al. (2022). Multiomics in the central Arctic Ocean for benchmarking biodiversity change. (ekstern lenke)
• Kauko, Hanna Maria; Assmy, Philipp; Peeken, Ilka et al. (2022). First phytoplankton community assessment of the Kong Håkon VII Hav, Southern Ocean, during austral autumn. (ekstern lenke)
• Lindivat, Mathilde; Bratbak, Gunnar; Larsen, Aud et al. (2021). Flow Cytometric Analysis of Bacterial Protein Synthesis: Monitoring Vitality After Water Treatment. (ekstern lenke)
• Müller, Oliver; Seuthe, Lena; Pree, Bernadette et al. (2021). How microbial food web interactions shape the arctic ocean bacterial community revealed by size fractionation experiments. (ekstern lenke)
• Kauko, Hanna Maria; Hattermann, Tore; Ryan-Keogh, Thomas J. et al. (2021). Phenology and Environmental Control of Phytoplankton Blooms in the Kong Håkon VII Hav in the Southern Ocean. (ekstern lenke)
• Egge, Elianne Dunthorn; Elferink, Stephanie; Vaulot, Daniel et al. (2021). An 18S V4 rDNA metabarcoding dataset of protist diversity in the Atlantic inflow to the Arctic Ocean, through the year and down to 1000 m depth. (ekstern lenke)
• Mayers, Kyle; Lawrence, Janice; Skaar, Katrine Sandnes et al. (2021). Removal of large viruses and their dispersal through fecal pellets of the appendicularian Oikopleura dioica during Emiliania huxleyi bloom conditions. (ekstern lenke)
• Lindivat, Mathilde; Larsen, Aud; Hess-Erga, Ole Kristian et al. (2020). Bioorthogonal Non-canonical Amino Acid Tagging Combined With Flow Cytometry for Determination of Activity in Aquatic Microorganisms. (ekstern lenke)
• Rozenberg, A.; Opperman, J.; Wietek, J. et al. (2020). Lateral gene transfer of anion-conducting channelrhodopsins between green algae and giant viruses. (ekstern lenke)
• Thingstad, T. Frede; Våge, Selina; Bratbak, Gunnar et al. (2020). Reproducing the virus-to-copepod link in Arctic mesocosms using host fitness optimization.. (ekstern lenke)
• Müller, Oliver; Seuthe, Lena; Bratbak, Gunnar et al. (2018). Bacterial response to permafrost derived organic matter input in an Arctic fjord. (ekstern lenke)
• Sandaa, Ruth-Anne; Bratbak, Gunnar (2018). Is the virus important? And some other questions. (ekstern lenke)
• Tsagaraki, Tatiana Margo; Pree, Bernadette; Leiknes, Øystein et al. (2018). Bacterial community composition responds to changes in copepod abundance and alters ecosystem function in an Arctic mesocosm study. (ekstern lenke)
• Sandaa, Ruth-Anne; Storesund, Julia Endresen; Olesin, Emily Maria et al. (2018). Seasonality drives microbial community structure, shaping both eukaryotic and prokaryotic host–viral relationships in an Arctic marine ecosystem. (ekstern lenke)
• Paulino, Ana; Larsen, Aud; Bratbak, Gunnar et al. (2018). Seasonal and annual variability in the phytoplankton community of the Raunefjord, west coast of Norway from 2001-2006. (ekstern lenke)
• Randelhoff, Achim; Reigstad, Marit; Chierici, Melissa et al. (2018). Seasonality of the physical and biogeochemical hydrography in the inflow to the Arctic Ocean through Fram Strait. (ekstern lenke)
• Müller, Oliver; Wilson, Bryan; Paulsen, Maria Lund et al. (2018). Spatiotemporal dynamics of ammonia-oxidizing Thaumarchaeota in Distinct Arctic water masses. (ekstern lenke)
• Lawrence, Janice; Töpper, Joachim Paul; Petelenz-Kurdziel, Elzbieta Anna et al. (2017). Viruses on the menu: The appendicularian Oikopleura dioica efficiently removes viruses from seawater. (ekstern lenke)
• Lawrence, Janice; Töpper, Joachim Paul; Petelenz-Kurdziel, Elzbieta Anna et al. (2017). Viruses on the menu: The appendicularian Oikopleura dioica efficiently removes viruses from seawater. (ekstern lenke)
• Pree, Bernadette; Larsen, Aud; Egge, Jorun Karin et al. (2017). Dampened copepod-mediated trophic cascades in a microzooplankton-dominated microbial food web: A mesocosm study. (ekstern lenke)
• Johannessen, Torill Vik; Larsen, Aud; Bratbak, Gunnar et al. (2017). Seasonal dynamics of haptophytes and dsDNA algal viruses suggest complex virus-host relationship. (ekstern lenke)
• Wilson, Bryan; Müller, Oliver; Nordmann, Eva-Lena et al. (2017). Changes in marine prokaryote composition with season and depth over an Arctic polar year. (ekstern lenke)
• Erga, Svein Rune; Haugen, Stig Bjarte; Bratbak, Gunnar et al. (2017). Seasonal variations in C:N:Si:Ca:P:Mg:S:K:Fe relationships of seston from Norwegian coastal water: Impact of extreme offshore forcing during winter-spring 2010. (ekstern lenke)
• Šantl-Temkiv, Tina; Amato, Pierre; Gosewinkel, Ulrich et al. (2017). High-Flow-Rate Impinger for the Study of Concentration, Viability, Metabolic Activity, and Ice-Nucleation Activity of Airborne Bacteria. (ekstern lenke)
• Paulsen, Maria Lund; Doré, Hugo; Garczarek, Laurence et al. (2016). Synechococcus in the Atlantic Gateway to the Arctic Ocean. (ekstern lenke)
• Johannessen, Torill Vik; Bratbak, Gunnar; Larsen, Aud et al. (2015). Characterisation of three novel giant viruses reveals huge diversity among viruses infecting Prymnesiales (Haptophyta). (ekstern lenke)
• Larsen, Aud; Egge, Jorun Karin; Nejstgaard, Jens Christian et al. (2015). Contrasting response to nutrient manipulation in Arctic mesocosms are reproduced by a minimum microbial food web model. (ekstern lenke)
• Bratbak, Gunnar (2015). On the progress of understanding algal viruses.. (ekstern lenke)
• Pagarete, António; Grébert, Théophile; Stepanova, Olga et al. (2015). Tsv-N1: A novel DNA algal virus that infects tetraselmis striata. (ekstern lenke)
• Carreira, Cátia; Heldal, Mikal; Bratbak, Gunnar (2013). Effect of increased pCO(2) on phytoplankton-virus interactions. (ekstern lenke)
• Medina-Sánchez, Juan Manuel; Delgado-Molina, José Antonio; Bratbak, Gunnar et al. (2013). Maximum in the middle : nonlinear response of microbial plankton to ultraviolet radiation and phosphorus. (ekstern lenke)
• Pagarete, Antonio; Lanzén, Anders; Puntervoll, Pål et al. (2013). Genomic sequence and analysis of EhV-99B1, a new coccolithovirus from the Norwegian fjords. (ekstern lenke)
• Heldal, Mikal; Norland, Svein; Erichsen, Egil Severin et al. (2012). Mg2+ as an indicator of nutritional status in marine bacteria. (ekstern lenke)
• Heldal, Mikal; Norland, Svein; Erichsen, Egil Severin et al. (2012). An unaccounted fraction of marine biogenic CaCO3 particles. (ekstern lenke)
• Ogata, Hiroyuki; Ray, Jessica Louise; Toyoda, Kensuke et al. (2011). Two new subfamilies of DNA mismatch repair proteins (MutS) specifically abundant in the marine environment. (ekstern lenke)
• Bratbak, Gunnar; Jacquet, Stephan; Larsen, Aud et al. (2011). The plankton community in Norwegian coastal waters-abundance, composition, spatial distribution and diel variation. (ekstern lenke)
• Liu, JingWen; Zheng, Tianling; Bratbak, Gunnar et al. (2011). Virus infection disturbs cyclin expression, leading to cell cycle arrest in the unicellular marine algae Emiliania huxleyi and Chrysochromulina ericina. (ekstern lenke)
• Fahlgren, C; Bratbak, Gunnar; Sandaa, Ruth-Anne et al. (2011). Diversity of airborne bacteria in samples collected using different devices for aerosol collection. (ekstern lenke)
• Allen, Michael J; Lanzén, Anders; Bratbak, Gunnar (2011). Characterisation of the coccolithovirus intein. (ekstern lenke)
• Liu, JingWen; Bratbak, Gunnar; Zheng, Tian Ling et al. (2011). Effects of virus infection on expression of cell cycle regulatory proteins in the unicellular marine algae Emiliania huxleyi. (ekstern lenke)
• Larsen, Jens Borggaard; Larsen, Aud; Bratbak, Gunnar et al. (2008). Phylogenetic analysis of members of the Phycodnaviridae virus family, using amplified fragments of the major capsid protein gene. (ekstern lenke)
• Monier, Adam; Larsen, Jens Borggaard; Sandaa, Ruth-Anne et al. (2008). Marine mimivirus relatives are probably large algal viruses. (ekstern lenke)
• Thingstad, T. Frede; Bellerby, Richard; Bratbak, Gunnar et al. (2008). Counterintuitive carbon-to-nutrient coupling in an Arctic pelagic ecosystem. (ekstern lenke)
• Larsen, Jens Borggaard; Larsen, Aud; Thyrhaug, Runar et al. (2008). Response of marine viral populations to a nutrient induced phytoplankton bloom at different pCO2 levels. (ekstern lenke)
• Martinez, Joaquín Martínez; Schroeder, Declan C.; Larsen, Aud et al. (2007). Molecular dynamics of Emiliania huxleyi and cooccurring viruses during two separate mesocosm studies. (ekstern lenke)
• Brussaard, Corina P.D.; Bratbak, Gunnar; Baudoux, Anne-Claire et al. (2007). Phaeocystis and its interaction with viruses. (ekstern lenke)
• Martínez-Martínez, Joaquin; Norland, Svein; Thingstad, Tron Frede et al. (2006). Variability in microbial population dynamics between similarly perturbed mesocosms. (ekstern lenke)
• Yan, XD; Chipman, PR; Castberg, T et al. (2005). The marine algal virus PpV01 has an icosahedral capsid with T=219 quasisymmetry. (ekstern lenke)
• Brussaard, Corina P.D.; Noordeloos, A.A.M.; Sandaa, Ruth-Anne et al. (2004). Discovery of a dsRNA virus infecting the marine photosynthetic protist Micromonas pusilla. (ekstern lenke)
• Landa, Harald; Bratbak, Gunnar; Heldal, Mikal (2004). Abundance and dynamics of free flagellate scales in marine costal ecosystems. (ekstern lenke)
• Larsen, Aud; Flaten, Gro Anita Fonnes; Sandaa, Ruth-Anne et al. (2004). Spring phytoplankton bloom dynamics in Norwegian coastal waters: Microbial community succession and diversity. (ekstern lenke)
• Larsen, Aud; Flaten, Gro Anita Fonnes; Sandaa, Ruth-Anne et al. (2004). Spring phytoplankton bloom dynamics in Norwegian coastal waters: Microbial community succession and diversity. (ekstern lenke)
• Thyrhaug, Runar; Larsen, Aud; Thingstad, Tron Frede et al. (2003). Stable coexistence in marine algal host-virus systems. (ekstern lenke)
• Jacquet, Stephan; Bratbak, Gunnar (2003). Effects of ultraviolet radiation on marine virus–phytoplankton interactions. (ekstern lenke)
• Sandaa, Ruth-Anne; Skjoldal, Evy Foss; Bratbak, Gunnar (2003). Virioplankton community structure along a salinity gradient in a solar saltern. (ekstern lenke)
• Castberg, Tonje; Thyrhaug, Runar; Larsen, Aud et al. (2002). Isolation and characterization of a virus that infects Emiliania huxleyi (Haptophyceae). (ekstern lenke)
• Vrede, Katarina; Heldal, Mikal; Norland, Svein et al. (2002). Elemental composition (C,N,P)and cell volume of exponentially growing and nutrient limited bacterioplankton. (ekstern lenke)
• Thyrhaug, Runar; Larsen, Aud; Brussaard, Corina P.D. et al. (2002). Cell cycle dependent virus production in marine phytoplankton. (ekstern lenke)
• Jacquet, Stephan; Heldal, Mikal; Iglesias-Rodriguez, Debora et al. (2002). Flow cytometric Analysis of an E. Huxleyi bloom terminated by viral infection. (ekstern lenke)
• Brussaard, Corina P.D.; Marie, Dominique; Thyrhaug, Runar et al. (2001). Flow cytometric analysis of phytoplankton viability following viral infection. (ekstern lenke)
• Sandaa, Ruth-Anne; Heldal, Mikal; Castberg, Tonje et al. (2001). Isolation and characterization of two viruses with large genome size infecting Chrysochromulina ericina (Prymneriophyceae) and Pyramimonas orientalis (Prasinophyceae). (ekstern lenke)
• Hewson, Ian; O'Neil, Judit M; Heil, Cynthia A et al. (2001). Effects of concentrated viral communities on photosynthesis and community composition of cooccurring benthic microalgae and phytoplankton. (ekstern lenke)
• Castberg, Tonje; Larsen, Aud; Sandaa, Ruth-Anne et al. (2001). Microbial population dynamics and diversity during a bloom of the marine coccolithophorid Emiliania huxleyi (Haptophyta). (ekstern lenke)
• Larsen, Aud; Castberg, Tonje; Sandaa, Ruth-Anne et al. (2001). Population dynamics and diversity of phytoplankton, bacteria and viruses in a seawater enclosure. (ekstern lenke)
• Rodriguez, F.; Fernandez, E.; Head, R.N. et al. (2000). Temporal variability of viruses, bacteria, phytoplankton and zooplankton in the western English Channel off Plymouth. (ekstern lenke)
• Brussaard, Corina P.D.; Marie, Dominique; Bratbak, Gunnar (2000). Flow cytometric detection of viruses. (ekstern lenke)
• Bratbak, Gunnar; Heldal, Mikal (2000). Virus rule the waves - the smallest and most abundant members of marine ecosystems. (ekstern lenke)
• Marie, Dominique; Brussaard, Corina P.D.; Thyrhaug, Runar et al. (1999). Enumeration of Marine Viruses in Culture and Natural Samples by Flow Cytometry. (ekstern lenke)
• Brussaard, Corina P.D.; Thyrhaug, Runar; Marie, Dominique et al. (1999). Flow cytometric analysis of virus infection in two marine phytoplankton species, Micromonas pusilla (Prasinophyceae) and Phaeocystis pouchetii (Prymnesiophyceae). (ekstern lenke)
• Bratbak, Gunnar; Jacobsen, Anita; Heldal, Mikal et al. (1998). Virus production in Phaeocystis pouchetii and its relation to host cell growth and nutrition. (ekstern lenke)
• Bratbak, Gunnar; Jacobsen, Anita; Heldal, Mikal (1998). Viral lysis of Phaeocystis pouchetii and bacterial secondary production. (ekstern lenke)
• Bratbak, Gunnar; Jacobsen, Anita; Heldal, Mikal (1998). Viral lysis of Phaeocystis pouchetii and bacterial secondary production. (ekstern lenke)
• Bratbak, Gunnar; Jacobsen, Anita; Heldal, Mikal et al. (1998). Virus production in Phaeocystis pouchetii and its relation to host cell growth and nutrition. (ekstern lenke)
• Malin, G.; Wilson, W.H.; Bratbak, Gunnar et al. (1998). Elevated production of dimethylsulfide resulting from viral infection of cultures of <EM>Phaeocystis pouchetii</EM>. (ekstern lenke)
• Oren, Aharon; Bratbak, Gunnar; Heldal, Mikal (1997). Occurrence of virus-like particles in the Dead Sea. (ekstern lenke)
• Tuomi, P.; Torsvik, Terje; Heldal, Mikal et al. (1997). Bacterial population dynamics in a meromictic lake. (ekstern lenke)
• Heldal, Mikal; Norland, Svein; Fagerbakke, Kjell Magne et al. (1996). The elemental composition of bacteria: a signature of growth conditions?. (ekstern lenke)
• Bratbak, Gunnar; Heldal, Mikal; Thingstad, Tron Frede et al. (1996). Dynamics of virus abundance in coastal seawater. (ekstern lenke)
• Gundersen, Kjell; Bratbak, Gunnar; Heldal, Mikal (1996). Factors influencing the loss of bacteria in preserved seawater samples. (ekstern lenke)
• Bratbak, Gunnar; Willson, William; Heldal, Mikal (1996). Viral control of Emiliania huxleyi blooms?. (ekstern lenke)
• Jacobsen, Anita; Bratbak, Gunnar; Heldal, Mikal (1996). Isolation and characterisation of a virus infecting Phaeocystis pouchetii (Haptophyceae). (ekstern lenke)
• Jacobsen, Anita; Bratbak, Gunnar; Heldal, Mikal (1996). Isolation and characterization of a virus infecting Phaeocystis pouchetii (Prymnesiophyceae). (ekstern lenke)
• Tuomi, Pirjo; Fagerbakke, Kjell Magne; Bratbak, Gunnar et al. (1995). Nutritional enrichment of a microbial community: The effects on activity, elemental composition, community structure and virus production. (ekstern lenke)
• Bratbak, Gunnar; Levasseur, M.; Michaud, M. et al. (1995). Viral activity in relation to Emiliania huxleyi blooms: a possible mechanism of DMSP release?. (ekstern lenke)
• Bratbak, Gunnar; Levasseur, M.; Michaud, M. et al. (1995). Viral activity in relation to Emiliania huxleyi blooms: a possible mechanism of DMSP release?. (ekstern lenke)
• Heldal, Mikal; Norland, Svein; Bratbak, Gunnar et al. (1994). Determination of bacterial cell number and cell volume by means of flow cytometer, transmission electron microscopy, and epifluorescene microscopy. (ekstern lenke)
• Bratbak, Gunnar; Egge, Jorun Karin; Heldal, Mikal (1993). Viral mortality of the marine alga Emiliania huxleyi (Haptophyceae) and termination of algal blooms. (ekstern lenke)
• Bratbak, Gunnar; Egge, Jorun Karin; Heldal, Mikal (1993). Viral mortality of the marine algae Emiliania huxleyi (Haptophyceae) and termination of algal blooms. (ekstern lenke)
• Bratbak, Gunnar; Heldal, Mikal; Thingstad, T.F et al. (1992). Incorporation of viruses into the budget of microbial C-transfer. A first approach. (ekstern lenke)
• Heldal, Mikal; Bratbak, Gunnar (1991). Production and decay of viruses in aquatic environments. (ekstern lenke)
• Børsheim, K. Y.; Bratbak, Gunnar; Heldal, Mikal (1990). Enumeration and biomass estimation on planktonic bacteria and viruses by transmission electron microscopy. (ekstern lenke)
• Bratbak, Gunnar; Heldal, Mikal; Norland, Svein et al. (1990). Viruses as Partners in Spring Bloom Microbial Trophodynamics. (ekstern lenke)
• Bratbak, Gunnar (1990). Virus: Spiller de noen økologisk rolle?. (ekstern lenke)
• Bergh, Ø; Børsheim, K. Y.; Bratbak, Gunnar et al. (1989). High abundance of viruses found in aquatic environments. (ekstern lenke)
• Bergh, Øivind; Børsheim, Knut Yngve; Bratbak, Gunnar et al. (1989). High abundance of viruses found in aquatic environments. (ekstern lenke)

Vitenskapelig foredrag

• Müller, Oliver; Gardner, Jessie; Olsen, Lasse et al. (2024). Arctic Sea ice ridges: Complex havens of biodiversity with astonishing community changes from ridge formation to melting and summer consolidation. (ekstern lenke)
• Fransson, Agneta; Bluhm, Bodil Annikki Ulla Barbro; Kohlbach, Doreen et al. (2024). Nansen vs. Amundsen Basin: Constrasting physico-chemical properties and biota composition to inform management. (ekstern lenke)
• Bjune, Anne Elisabeth; Bratbak, Gunnar; Eliassen, Sigrunn et al. (2023). Omlegging fra tradisjonelle forelesninger til studentaktiv læring – eksempel fra et grunnemne i biolog. (ekstern lenke)
• Müller, Oliver; Bratbak, Gunnar; Paulsen, Maria Lund (2023). Increased organic matter input. Testing bacterial responses in Arctic fjords vs Barents Sea. (ekstern lenke)
• Gradinger, Rolf Rudolf; Amargant I Arumi, Marti; Assmy, Philipp Kurt Wolf et al. (2023). Ranges of Annual Production in the Barents Sea along Environmental Gradients. (ekstern lenke)
• Saltvedt, Marius Rydningen; Wang, Haina; Dahle, Håkon et al. (2023). PERSISTENT VIRUS PRODUCTION BY PHYTOPLANKTON. (ekstern lenke)
• Salganik, Evgenii; Müller, Oliver; Olsen, Lasse Mork et al. (2023). Hidden in Plain Sight – New Insights on Arctic Sea-Ice Ridges from the MOSAiC Expedition – an Overview. (ekstern lenke)
• Müller, Oliver; Gardner, Jessie; Lange, Benjamin et al. (2022). ARCTIC SEA ICE RIDGES – DYNAMIC HOTSPOTS FOR MICROBIAL LIFE. (ekstern lenke)
• Mayers, Kyle; Lawrence, Janice; Töpper, Joachim Paul et al. (2020). Interactions between the filter-feeding appendicularian Oikopleura dioica and the abundance and fate of marine viruses​. (ekstern lenke)
• Egge, Elianne Dunthorn; Vaulot, Daniel; Larsen, Aud et al. (2017). Protist community structure in Atlantic Arctic through the year as revealed by high throughput sequencing.. (ekstern lenke)
• Tsagaraki, Tatiana; Egge, Jorun Karin; Bratbak, Gunnar et al. (2017). Microbial Food web structure in a changing Arctic.. (ekstern lenke)
• Paulsen, Maria Lund; Doré, Hugo; Garczarek, Laurence et al. (2017). Synechococcus in the Arctic Ocean. (ekstern lenke)
• Sandaa, Ruth-Anne; Ray, Jessica Louise; Enoult, Francois et al. (2017). Light and depth - main drivers of marine virus diversity and dynamics in the Arctic - Metagenomic analysis of total viral assemblages from surface to the deep . (ekstern lenke)
• Edvardsen, Bente; Egge, Elianne Dunthorn; Vaulot, Daniel et al. (2017). Protist community structure in Atlantic Arctic through the year as revealed by high throughput sequencing. (ekstern lenke)
• Ray, Jessica Louise; Enault, François; Johannessen, Torill Vik et al. (2017). from light to dark and shallow to deep: Metagenomic analysis of total virus assemblages from arctic seawater provides a first glance of season- and depth-driven virus diversity and dynamics. (ekstern lenke)
• Ray, Jessica Louise; Johannessen, Torill Vik; Wilson, Brian C. et al. (2016). Development of a semi-automated method for metagenomic characterization of total virus assemblages from seasonal high-latitude seawater samples. (ekstern lenke)
• Ray, Jessica Louise; Lawrence, Janice; Petelenz-Kurdziel, Elzbieta Anna et al. (2016). Role of appendicularians in aquatic viral ecology: particle trapping, ingestion and consequences for the marine microbial food web. (ekstern lenke)
• Edvardsen, Bente; Egge, Elianne Sirnæs; Johannessen, Torill Vik et al. (2014). Diversity and seasonal dynamics of marine haptophytes and their viruses. (ekstern lenke)
• Edvardsen, Bente; Egge, Elianne Sirnæs; Torill Vik, Johannessen et al. (2013). Diversity and dynamics of marine haptophytes and their viruses. (ekstern lenke)
• Pagarete, Antonio; Puntervoll, Pål; Lanzén, Anders et al. (2011). Geographic segregation and mechanisms of genetic evolution between coccolithovirus populations: a genomic study. (ekstern lenke)
• Thingstad, T.F.; Bellerby, Richard; Bratbak, Gunnar et al. (2008). Increased level of CO2 in the ecosphere may modify the structure of marine plankton. (ekstern lenke)
• Thyrhaug, Runar; Einen, Jørn; Sandaa, Ruth-Anne et al. (2007). Total numbers and activity of environmental airborne bacteria. (ekstern lenke)
• Bratbak, Gunnar (2007). Virus Ecology. (ekstern lenke)
• Bratbak, Gunnar (2007). Virus in aquatic ecosystems: Who are they and what are they doing?. (ekstern lenke)
• Bratbak, Gunnar (2006). The global role of viruses in bloom termination, biodiversity and marine ecology. (ekstern lenke)
• Bratbak, Gunnar (2006). Algal Viruses –a Diverse Group with Ecological Impact. (ekstern lenke)
• Heldal, Mikal; Norland, Svein; Thingstad, Tron Frede et al. (2005). Single cell analysis: X-ray microanalysis in TEM. (ekstern lenke)
• Heldal, Mikal; Bratbak, Gunnar; Thingstad, Tron Frede et al. (2005). Single cell analysis: X-ray microanalysis in TEM. (ekstern lenke)
• Heldal, Mikal; Norland, Svein; Bratbak, Gunnar et al. (2005). X-ray microanalyses of bacteria at the single cell level: Does elemental composition of cells relate to activity and nutritional status of cells?. (ekstern lenke)
• Bratbak, Gunnar (2005). An overview of algal viruses. (ekstern lenke)
• Bratbak, Gunnar (2005). Methods in viral ecology. (ekstern lenke)
• Sandaa, Ruth-Anne; Bratbak, Gunnar (2004). Viral diversity in solar saltern. (ekstern lenke)
• Bratbak, Gunnar (2003). Counting and Characterization of Microalgae, Bacteria and Virus in Marine Ecosystems. (ekstern lenke)
• Bratbak, Gunnar (2003). Vyer for Fremtiden?. (ekstern lenke)
• Larsen, Aud; Thyrhaug, Runar; Sandaa, Ruth-Anne et al. (2002). Marine phytoplankton viruses - ecology, physiology and host virus interactions. (ekstern lenke)
• Larsen, Aud; Castberg, Tonje; Sandaa, Ruth-Anne et al. (2002). Marine Phytoplankton Viruses-Ecology, Physiology and Host Virus Interactions. (ekstern lenke)
• Castberg, Tonje; Bratbak, Gunnar (2002). Large Algal Viruses, Characterization. (ekstern lenke)
• Bratbak, Gunnar (2002). MICROALGAL VIRUS ECOLOGY. (ekstern lenke)
• Thyrhaug, Runar; Larsen, Aud; Bratbak, Gunnar et al. (2000). Is Virus Production in Marine Algae Cell-cycle Dependent?. (ekstern lenke)
• Bratbak, Gunnar; Brussaard, Corina P. D.; Castberg, Tonje et al. (2000). Diversity and succession of algae, virus and bacteria in nutrient enriched seawater enclosures. (ekstern lenke)
• Castberg, Tonje; Sandaa, Ruth-Anne; Bratbak, Gunnar (2000). Bacterial population dynamics and diversity after viral lysis of three different algal species. (ekstern lenke)
• Sandaa, Ruth-Anne; Heldal, Mikal; Castberg, Tonje et al. (2000). Isolation and characterization of two marine viruses infecting Chrysochromulina ericina and Pyramimonas orientalis. (ekstern lenke)
• Castberg, Tonje; Graves, M.V.; Bratbak, Gunnar et al. (2000). Extracellular Release of DNA During High-Dose PBCV-1 Infection of Chlorella. (ekstern lenke)
• Castberg, Tonje; Bratbak, Gunnar (2000). Bacterial population dynamics and diversity after viral lysis of three different algal species. (ekstern lenke)
• Sandaa, Ruth-Anne; Larsen, Aud; Castberg, Tonje et al. (2000). Population dynamics in the virioplankton community during marine algal blooms. (ekstern lenke)
• Brussaard, Corina P.D.; Sandaa, Ruth-Anne; Bratbak, Gunnar (2000). Infection of Micromonas pusilla (Prasinophyceae) by a dsRNA virus. (ekstern lenke)
• Brussaard, Corina P.D.; Marie, Dominique; Bratbak, Gunnar (2000). Virus detection and enumeration using flow cytometry. (ekstern lenke)
• Thyrhaug, Runar; Larsen, Aud; Bratbak, Gunnar (2000). Persistent virus infection in marine phytoplankton. (ekstern lenke)
• Brussaard, Corina P.D.; Bratbak, Gunnar (1999). Viral control of phytoplankton blooms. (ekstern lenke)
• Bratbak, Gunnar (1999). Phytoplankton Viruses - Ecology And Host Virus Interactions. (ekstern lenke)
• Bratbak, Gunnar (1999). Algal Viruses - Characterization of new viruses and Quantification by Flow Cytometry and Pulsefield Gelelectrophoresis. (ekstern lenke)
• Brussaard, Corina P.D.; Marie, Dominique; Bratbak, Gunnar (1999). Flow Cytometric Analysis Of Virus Infected Phytoplankton. (ekstern lenke)
• Castberg, Tonje; Enger, Øivind; Bratbak, Gunnar (1998). Detection of <EM>Phaeocytus</EM>-virus by PCR. (ekstern lenke)
• Bratbak, Gunnar (1998). Ecology of algal host-virus interactions. (ekstern lenke)
• Castberg, Tonje; Bratbak, Gunnar; Enger, Øivind (1998). A PCR approach to specific quantification of <EM>Phaeocytis</EM> virus. (ekstern lenke)
• Malin, G.; Wilson, W.H.; Bratbak, Gunnar et al. (1998). Elevated production of dimethylsulfide resulting from viral infection of cultures of <EM>Phaeocystis pouchetii</EM>. (ekstern lenke)
• Castberg, Tonje; Bratbak, Gunnar (1998). Algevirus. (ekstern lenke)
• Heldal, Mikal; Tuomi, P.; Norland, Svein et al. (1998). Isolates of marine bacteria: elemental content relates to growth conditions [poster]. (ekstern lenke)
• Bratbak, Gunnar; Heldal, Mikal (1998). Ecology of <EM>Phaeocystis</EM> host-virus interactions. (ekstern lenke)
• Brussard, Corina; Marie, Dominique; Thyrhaug, Runar et al. (1998). Characterization of virus infected phytoplankton cells by FCN. (ekstern lenke)
• Marie, Dominique; Brussard, Corina; Thyrhaug, Runar et al. (1998). Enumeration of viruses in marine samples by flow cytometry [poster]. (ekstern lenke)
• Bratbak, Gunnar; Heldal, Mikal (1998). Ecology of Phaeocystis host-virus interactions. (ekstern lenke)
• Flaten, Gro Anita Fonnes; Thingstad, T. Frede; Bratbak, Gunnar (1998). Bacterial activity measured by different single-cell methods. (ekstern lenke)
• Thingstad, Tron Frede; Bratbak, Gunnar; Heldal, Mikal et al. (1997). Trophic interactions controlling the diversity in pelagic microbial food webs. (ekstern lenke)
• Bratbak, Gunnar; Heldal, Mikal; Utkilen, H. et al. (1997). Viral impact on algal blooms. (ekstern lenke)
• Bratbak, Gunnar; Heldal, Mikal; Thingstad, Tron Frede (1997). The marine microbial ecology revised. (ekstern lenke)
• Bratbak, Gunnar; Øvreås, Lise; Thingstad, Tron Frede (1997). Hutchinson's paradox reversed? Is the bacterioplankton diversity lower than predicted by steady state models?. (ekstern lenke)
• Nagasaki, Keizo; Wilson, William; Heldal, Mikal et al. (1996). Preliminary analysis of structural proteins and DNA of PpV-1, a large dsDNA virus which is infectious to Phaeocystis pouchetii. (ekstern lenke)
• Guixa-Boixareu, Núria; Calderón-Paz, Juan; Heldal, Mikal et al. (1996). Viral lysis and bacterivory as prokaryotic loss factors along a salinity gradient. (ekstern lenke)
• Tuomi, Pirjo; Torsvik, Terje; Heldal, Mikal et al. (1996). Bacterial population dynamics in a meromictic lake Sælenvatnet. (ekstern lenke)
• Jacobsen, Anita; Bratbak, Gunnar; Heldal, Mikal (1996). Isolation of a virus infecting Phaeocystis pouchetii (Haptophyceae). (ekstern lenke)
• Wilson, William; Mallin, Gillian; Bratbak, Gunnar et al. (1996). Oceanic Dimethyl sulphide: Elevated Production During Virus Infection of Phaeocystis pouchetii (Hariot) Lagerheim. (ekstern lenke)
• Norland, Svein; Mikal, Heldal; Bratbak, Gunnar et al. (1995). Analytical use of Transmission Electron Microscope (TEM) in aquatic microbial ecology. (ekstern lenke)
• Norland, Svein; Bratbak, Gunnar; Fagerbakke, Kjell Magne et al. (1995). Quantitative analysis of carbon, nitrogen, oxygen and phosphorous in single bacteria by use of X-ray - TEM. (ekstern lenke)
• Heldal, Mikal; Bratbak, Gunnar (1995). Algevirus - kontrollerer de oppblomstringer?. (ekstern lenke)
• Bratbak, Gunnar; Thingstad, Tron Frede; Heldal, Mikal (1993). Virus and the Microbial Loop, Paradigms and Paradoxes in the microbial loop. (ekstern lenke)
• Heldal, Mikal; Bratbak, Gunnar (1993). Decay and fate of aquatic viruses. (ekstern lenke)

Poster

• Amargant I Arumi, Marti; Müller, Oliver; Bodur, Yasemin Vicdan et al. (2023). Lower trophic level carbon fluxes in two summers of contrasting ice conditions. (ekstern lenke)
• Olsen, Lasse Mork; Müller, Oliver; Bratbak, Gunnar et al. (2022). The working of the microbial food web inside sea ice ridges vs. the water column in winter and summer in the Arctic Ocean. (ekstern lenke)
• Saltvedt, Marius Rydningen; Wang, Haina; Lawrence, Janice et al. (2022). Friend or enemy: The story of a frenemy relationship between a virus and its host. (ekstern lenke)
• Mork Olsen, Lasse; Müller, Oliver; Thingstad, T. Frede et al. (2022). How carbon flow is controlled by microbial predator-prey interactions along a productivity gradient in the Barents Sea. (ekstern lenke)
• Müller, Oliver; Paulsen, Maria Lund; Seuthe, Lena et al. (2019). Biological drivers of bacterial communities in the Arctic water inflow region . (ekstern lenke)
• Mayers, Kyle; Lawrence, Janice; Töpper, Joachim Paul et al. (2019). Trophic interactions between filter-feeding mesozooplankton and the Emiliania huxleyi virus. (ekstern lenke)
• Lindivat, Mathilde; Larsen, Aud; Bratbak, Gunnar et al. (2018). Bacterial Viability and Vitality: Application of Click Chemistry in Flow Cytometry. (ekstern lenke)
• Müller, Oliver; Øvreås, Lise; Bratbak, Gunnar et al. (2017). How permafrost organic matter input in an Arctic fjord alters the bacterial community structure. (ekstern lenke)
• Sandaa, Ruth-Anne; Ray, Jessica Louise; Storesund, Julia Endresen et al. (2016). Marine viral diversity in the Arctic - from surface to deep waters through the long polar night and day.. (ekstern lenke)
• Wilson, Bryan; Müller, Oliver; Nordmann, Eva-Lena et al. (2016). A year in the microbial life of a changing Arctic Ocean. (ekstern lenke)
• Norland, Svein; Bratbak, Gunnar; Thingstad, Tron Frede et al. (2005). Bacterial physiology at the single cell level: do elemental composition reveals any signatures related to growth, dormancy or death?. (ekstern lenke)
• Heldal, Mikal; Norland, Svein; Erichsen, Egil Severin et al. (2005). Mg2+ plays an important role in marine bacteria. (ekstern lenke)
• Larsen, Aud; Flaten, Gro Anita Fonnes; Thyrhaug, Runar et al. (2003). Dynamics and succession during the spring bloom in the Norwegian coastal current, with emphasis on the smallest participants. (ekstern lenke)
• Løvdal, Trond; Heldal, Mikal; Bratbak, Gunnar (2002). Can UV C-radiation restrict toxic algal blooms? Experimental studies for the determination of suitable radiation dose and fractions of water treated. (ekstern lenke)
• Larsen, Aud; Flaten, Gro Anita Fonnes; Thyrhaug, Runar et al. (2001). Dynamics and succession during the spring bloom in Norwegian coastal current, with emphasis on the smallest participants. (ekstern lenke)
• Yan, X.; Chipman, P.; Castberg, Tonje et al. (2001). The Structure of PpV01, a Marine Algal Virus With a T=219 Capsid. (ekstern lenke)
• Larsen, Aud; Thyrhaug, Runar; Bratbak, Gunnar (2000). Vedvarende virusinfeksjon i marint fytoplankton. (ekstern lenke)
• Sandaa, Ruth-Anne; Bratbak, Gunnar (2000). A method for diversity analysis of viruses in small volumes of seawater. (ekstern lenke)
• Bratbak, Gunnar; Brussaard, Corina; Castberg, Tonje et al. (1999). Virus i Havet. (ekstern lenke)
• Bratbak, Gunnar; Egge, Jorun Karin; Heldal, Mikal (1995). Viral control of algal blooms?. (ekstern lenke)
• Heldal, Mikal; Tuomi, Pirjo; Fagerbakke, Kjell Magne et al. (1995). Detection of polyphosphate bodies in bacteria: fluorescens microscopy and X-ray microanalysis. (ekstern lenke)

Vitenskapelig oversiktsartikkel/review

• Gerland, Sebastian; Ingvaldsen, Randi Brunvær; Reigstad, Marit et al. (2023). Still Arctic? — The changing Barents Sea. (ekstern lenke)
• Våge, Selina; Bratbak, Gunnar; Egge, Jorun Karin et al. (2018). Simple models combining competition, defence and resource availability have broad implications in pelagic microbial food webs. (ekstern lenke)

Faglig foredrag

• Saltvedt, Marius Rydningen; Lawrence, Janice; Wang, Haina et al. (2021). Vital and all over the place – A neglected group of frenemy viruses. (ekstern lenke)
• Wilson, Bryan; Müller, Oliver; Nordmann, Eva-Lena et al. (2017). A year in the microbial life of a changing Arctic Ocean. (ekstern lenke)
• Thyrhaug, Runar; Larsen, Aud; Bratbak, Gunnar et al. (2010). Use of flow cytometry in air and marine microbiological research. (ekstern lenke)

Rapport

• Ingvaldsen, Randi Brunvær; Bluhm, Bodil; Aberle-Malzahn, Nicole et al. (2020). Joint Cruise 1-2 2018: Cruise Report . (ekstern lenke)
• Bratbak, Gunnar; et al., [Mangler fornavn] (1998). Algal Virus Workshop : Abstracts - Program - Participiants : Bergen, Norway June 14 - 18, 1998. (ekstern lenke)
• Bratbak, Gunnar (1996). Abstracts - Program - Participants. Fifth European Marine Microbiology Symposium. (ekstern lenke)

Dokumentar

• Bratbak, Gunnar (2018). Samler alger, bakterier og virus. Blogg: Arven etter Nansen. (ekstern lenke)

Doktorgradsavhandling

• Paulsen, Maria Lund; Larsen, Aud; Bratbak, Gunnar et al. (2017). Microbial dynamics in high latitude ecosystems. Responses to mixing, runoff and seasonal variation a rapidly changing environment. (ekstern lenke)
• Bratbak, Gunnar (1988). Production, amount and fate of bacterial biomass in marine waters : a discussion of field methods and results in a laboratory perspective. (ekstern lenke)

Anmeldelse

• Thingstad, T. Frede; Bratbak, Gunnar (2016). Microbial Oceanography. Viral strategies at sea. (ekstern lenke)

Short communication

• Gallot-lavallée, Lucie; Pagarete, António; Legendre, Matthieu et al. (2015). The 474-kilobase-pair complete genome sequence of CeV-01B, a virus infecting Haptolina (Chrysochromulina) ericina (Prymnesiophyceae). (ekstern lenke)

Leder

• Brussaard, Corina P.D.; Wilhelm, Steven W.; Thingstad, T. Frede et al. (2008). Global-scale processes with a nanoscale drive: the role of marine viruses. (ekstern lenke)

Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

• Thingstad, T. Frede; Bratbak, Gunnar; Heldal, Mikal (2008). Aquatic phage ecology. (ekstern lenke)
• Heldal, Mikal; Bratbak, Gunnar; Erichsen, Egil S. et al. (2003). X-ray microanalysis of native aquatic bacteria. (ekstern lenke)
• Bratbak, Gunnar (1993). Microscope methods for measuring bacterial biovolume: epifluorescence microscopy, scanning electron microscopy and transmission electron microscopy. (ekstern lenke)
• Bratbak, Gunnar; Heldal, Mikal (1993). Total Counts of Viruses in Aquatic Environments. (ekstern lenke)

Intervju

• Bratbak, Gunnar; Finstad, Hanne S. (2002). En Munnfull Virus. (ekstern lenke)
• Bratbak, Gunnar; Eliassen, Haakon E.H. (2001). Strålende våpen avliver dødsalger. (ekstern lenke)
• Bratbak, Gunnar; Orvik, Ronny (2001). Stråler algene til døde. (ekstern lenke)

Kompendium

• Bratbak, Gunnar (2001). BIO 101 Basal Biologi Laboratorieøvelser i Cellebiologi. (ekstern lenke)
• Bratbak, Gunnar; Heldal, Mikal (1997). Program and group reports from course in Microbial activity and diversity in aquatic interphases. (ekstern lenke)

Fagbok

• Bratbak, Gunnar; Heldal, Mikal; Joint, Ian (1995). Viruses - the new players in the game; their ecologial role and could they mediate genetic exchange by transduction?. (ekstern lenke)

Populærvitenskapelig foredrag

• Bratbak, Gunnar (1994). Oppdagelsen av marine virus. (ekstern lenke)
• Bratbak, Gunnar (1994). The ecological role of virus. (ekstern lenke)
• Bratbak, Gunnar (1994). Virus i vann. (ekstern lenke)
• Heldal, Mikal; Bratbak, Gunnar; Thingstad, Tron Frede (1994). The possible impact of viruses on marine food webs. (ekstern lenke)
• Bratbak, Gunnar; Heldal, Mikal (1994). Viruses - the new players in the game.... (ekstern lenke)
• Bratbak, Gunnar; Heldal, Mikal (1994). Virus og bakterier sin økologiske rolle i akvatiske miljøer. (ekstern lenke)
• Bratbak, Gunnar; Heldal, Mikal (1993). Carbon budget in the microbial/viral loop. (ekstern lenke)

Se en full oversikt over publikasjoner i Cristin

Sandaa R.-A., Storesund JE, Olesin E, Paulsen ML, Larsen A, Bratbak G and Ray JL. Seasonality drives microbial community structure, shaping both eukaryotic and prokaryotic host-viral relationships in an Arctic marine ecosystem. Viruses 2018, 10(12), 715; https://doi.org/10.3390/v10120715

Sandaa R.-A. and Bratbak G 2018. Is the Virus Important? And Some Other Questions viruses 2018, 10, 442; doi:10.3390/v10080442

Våge S, Bratbak G, Egge J, Heldal M, Larsen A, Norland S, Paulsen ML Pree B. Sandaa, R-A. Skjoldal EF, Tsagaraki T, Øvreås L, Thingstad TF. 2018. Simple models combining competition, defence and resource availability have broad implications in pelagic microbial food webs. Ecology Letters. doi: 10.1111/ele.13122

Müller O, Seuthe L, Bratbak G, Paulsen ML. Bacterial response to permafrost derived organic matter input in an Arctic fjord.  Front. Mar. Sci., 06 August 2018 doi: 10.3389/fmars.2018.00263

Tsagaraki TM, Pree B, Leiknes Ø, Larsen A, Bratbak G, Øvreås L, Egge JK, Spanek R, Paulsen ML, Olsen Y, Vadstein O and Thingstad TF. 2018. Bacterial community composition responds to changes in copepod abundance and alters ecosystem function in an Arctic mesocosm study. ISME J DOI: 10.1038/s41396-018-0217-7

Achim Randelhoff, Marit Reigstad, Melissa Chierici, Arild Sundfjord, Vladimir Ivanov, Mattias Cape, Maria Vernet, Jean-Eric Tremblay, Gunnar Bratbak, Svein Kristiansen. 2018. Seasonality of the Physical and Biogeochemical Hydrography of the Fram Strait Branch. Front. Mar. Sci. 5:224. doi: 10.3389/fmars.2018.00224

Oliver Müller, Bryan Wilson, Maria L. Paulsen, Agnieszka Rumińska, Hilde R. Armo, Gunnar Bratbak, Lise Øvreås. 2018. Spatiotemporal dynamics of ammonia-oxidizing Thaumarchaeota in distinct Arctic water masses. Front. Microbiol. 9:24. doi: 10.3389/fmicb.2018.00024

Ana I. Paulino, J.K. Egge, A. Larsen, S. R. Erga, G. Bratbak, D. Evensen 2018. Seasonal and annual variability in the phytoplankton community of raunefjord, westcoast of Norway from 2001-2006. Marine Biology Research doi: 10.1080/17451000.2018.1426863

Lawrence J, Töpper J, Petelenz-Kurdziel E, Bratbak G, Larsen A , Thompson E, Troedsson C, Ray JL. 2017. Viruses on the menu: The appendicularian Oikopleura dioica efficiently removes viruses from seawater. Limnology and Oceanography. doi: 10.1002/lno.10734

Tina Šantl-Temkiv, Pierre Amato, Ulrich Gosewinkel, Runar Thyrhaug, Anaïs Charton, Benjamin Chicot, Kai Finster, Gunnar Bratbak, and Jakob Löndahl. (2017) A high-flow-rate impinger for the study of concentration, viability, activity, and ice nucleation activity of airborne bacteria. Environmental Science & Technology. 2017, 51, 11224−11234.  10.1021/acs.est.7b01480

Svein Rune Erga, Stig Bjarte Haugen, Gunnar Bratbak, Jorun Karin Egge, Mikal Heldal, Kjell Arne Mork, Svein Norland. 2017. Seasonal variations in C:N:Si:Ca:P:Mg:S:K:Fe relationships of seston from Norwegian coastal water: Impact of extreme offshore forcing during winter-spring 2010. Marine Chemistry 196 (2017) 1–12. 10.1016/j.marchem.2017.07.001

Torill Vik Johannessen, Aud Larsen, Gunnar Bratbak, António Pagarete, Bente Edvardsen, Elianne S. Egge, Ruth-Anne Sandaa 2017. Seasonal dynamics of haptophytes and algal viruses suggest complex virus-host relationship. Viruses, 9, 84; doi:10.3390/v9040084

Bryan Wilson, Oliver Müller, Eva-Lena Nordmann, Lena Seuthe, Gunnar Bratbak, Lise Øvreås. 2017. Changes in marine prokaryote composition with season and depth over an Arctic polar year. Front. Mar. Sci. 4:95. doi: 10.3389/fmars.2017.00095

Pree P, Larsen A, Egge JK, Simonelli P, Madhusoodhanan R, Tsagaraki T, Våge S, Erga SR, Bratbak G, Thingstad TF. 2016. 2016. Dampened copepod-mediated trophic cascades in a microzooplankton-dominated microbial food web: a mesocosm study. Limnology and Oceanography doi: 10.1002/lno.10483

Maria Lund Paulsen, Hugo Doré, Laurence Garczarek, Lena Seuthe, Oliver Müller, Ruth-Anne Sandaa, Gunnar Bratbak, Aud Larsen. 2016. Synechococcus in the Atlantic gateway to the Arctic Ocean. Frontiers in Marine Science. doi: 10.3389/fmars.2016.00191

Thingstad, TF and Bratbak, G 2016. Microbial Oceanography. Viral strategies at sea. Nature 531: 454-455

Gallot-Lavallée L, Pagarete A, Legendre M, Santini S, Sandaa R-A, Himmelbauer H, Ogata H, Bratbak G, Claverie J-M. 2015. The 474-kilobase-pair complete genome sequence of CeV-01B, a virus infecting Haptolina (Chrysochromulina) ericina (Prymnesiophyceae). Genome Announc 3(6):e01413-15. doi:10.1128/genomeA.01413-15.

António Pagarete, Théophile Grébert, Olga Stepanova, Ruth-Anne Sandaa and Gunnar Bratbak (2015). Tsv-N1: A Novel DNA Algal Virus that Infects Tetraselmis striata. Viruses 7:3937-3953; doi:10.3390/v7072806

Bratbak, G (2015) On the progress of understanding algal viruses. Perspectives in Phycology. 10.1127/pip/2015/0035

Larsen A, Egge JK, Nejstgaard JC, Capua ID, Thyrhaug R, Bratbak G, Thingstad TF (2015) Contrasting response to nutrient manipulation in Arctic mesocosms are reproduced by a minimum microbial food web model. Limnol. Oceanog. 60:360-374.

Johannessen TV, Bratbak G, Larsen A, Ogata H, Egge ES, Edvardsen B, Eikrem W, Sandaa RA (2015) Characterisation of three novel giant viruses reveals huge diversity among viruses infecting Prymnesiales (Haptophyta). Virology 476:180–188.

Juan Manuel Medina-Sánchez, José Antonio Delgado-Molina, Gunnar Bratbak, Francisco José Bullejos, Manuel Villar-Argaiz and Presentación Carrillo (2013). Maximum in the middle: Nonlinear response of microbial plankton to ultraviolet radiation and phosphorus. PLoS ONE 8(4): e60223. doi:10.1371/journal.pone.0060223

Heldal M, Norland N, Erichsen ES, Thingstad TF and Bratbak G (2012) An unaccounted fraction of marine biogenic CaCO3 particles. PLOS ONE 7 e47887, doi:10.1371/journal.pone.0047887

Pagarete, A., Lanzén, A., Puntervoll, P., Sandaa, R.A., Larsen, A., Larsen, J.B., Allen, M.J., Bratbak G. 2012. Genomic sequence and analysis of ehv-99b1, a new coccolithovirus from the Norwegian fjords. Intervirology DOI: 10.1159/000341611.

Carreira C., Heldal M. and Bratbak. G. 2012. Effect of increased pCO2 on phytoplankton- virus interactions. Biogeochemistry DOI 10.1007/s10533-011-9692-x

Mikal Heldal, Svein Norland, Egil Severin Erichsen, Ruth-Anne Sandaa, Aud Larsen, Frede Thingstad and Gunnar Bratbak. 2012. Mg2+ as indicator of nutritional status in marine bacteria. The ISME Journal. 6:524-530 doi:10.1038/ismej.2011.130

Gunnar Bratbak, Stéphan Jacquet, Aud Larsen, Lasse H. Pettersson, Andrey F. Sazhin and Runar Thyrhaug. 2011 The plankton community in Norwegian coastal waters - abundance, composition, spatial distribution and diel variation. Continental Shelf Research doi:10.1016/j.csr.2011.06.014

Allen, Michael J., Lanzén, Anders and Bratbak, Gunnar. 2011. Characterisation of the coccolithovirus intein. Marine Genomics. Marine Genomics. doi:10.1016/j.margen.2010.11.001

Hiroyuki Ogata, Jessica Ray, Kensuke Toyoda, Ruth-Anne Sandaa, Keizo Nagasaki, Gunnar Bratbak, Jean-Michel Claverie. 2011. Girus-encoded MutS subfamilies abundant in the marine environment. The ISME Journal doi:10.1038/ismej.2010.210

Camilla Fahlgren, Gunnar Bratbak, Ruth-Anne Sandaa, Runar Thyrhaug & Ulla Li Zweifel 2011. Diversity of airborne bacteria in samples collected using different devices for aerosol collection. Aerobiologia 27:107–120

Nagasaki, K and Bratbak, G 2010. Isolation of viruses infecting photosynthetic and non-photosynthetic protists. Limnology and Oceanography: Methods, Manual of Aquatic Viral Ecology (Chapter 10, 2010, 92–101) DOI 10.4319/mave.2010.978-0-9845591-0-7.92

T. F. Thingstad , R. G. J. Bellerby, G. Bratbak, K. Y. Børsheim, J. K. Egge, M. Heldal, A. Larsen, C. Neill, J. Nejstgaard, S. Norland, R.-A. Sandaa, E. F. Skjoldal, T. Tanaka, R. Thyrhaug & B. Töpper. 2008. Counterintuitive carbon-to-nutrient coupling in an Arctic pelagic ecosystem. Nature 455:387-390.

Larsen JB, Larsen A, Bratbak G and Sandaa R-A. 2008. Phylogenetic analysis of members of the Phycodnaviridae virus family using amplified fragments of the major capsid protein gene.  Appl Environ Microbiol. 74: 3048–3057.

Larsen, J. B., Larsen, A., Thyrhaug, R., Bratbak, G and Sandaa, R-A. 2008. Response of marine viral populations to a nutrient induced phytoplankton bloom at different pCO2 levels. Biogeosciences 5: 523–533.

Corina PD Brussaard, Steven W Wilhelm, Frede Thingstad, Markus G Weinbauer, Gunnar Bratbak, Mikal Heldal, Susan A Kimmance, Mathias Middelboe, Keizo Nagasaki, John H Paul, Declan C Schroeder, Curtis A Suttle, Dolors Vaque´ and K Eric Wommack. 2008.  Commentary: Global-scale processes with a nanoscale drive: the role of marine viruses. The ISME Journal 1–4.

Monier A, Larsen JB, Sandaa R-A, Bratbak G, Claverie J-M and Ogata H. 2008. Marine mimivirus relatives are probably large algal viruses. Virology Journal 2008, 5:12 doi:10.1186/1743-422X-5-12

Brussaard CPD, G Bratbak, AC Baudoux & P Ruardij 2007. Phaeocystis and its interaction with viruses. Biogeochemistry 83: 201-215.

Joaquin Martínez Martínez, Declan C. Schroeder, Aud Larsen, Gunnar Bratbak and William H. Wilson. 2007. Molcular dynamics of Emliania huxleyi and their co-occurring viruses during two separate mesocosm studies. Appl. Environ. Microbiol. 73:554-562

J. Martínez-Martínez, S. Norland T. F. Thingstad, D.C. Schroeder, G. Bratbak, W. H. Wilson, A. Larsen. 2006. Variability in microbial population dynamics between similarly perturbed mesocosms. Journal of Plankton Research. 28:783-791.

Xiaodong Yan, Paul R. Chipman, Tonje Castberg, Gunnar Bratbak, and Timothy S. Baker. 2005 The Marine Algal Virus PpV01 Has an Icosahedral Capsid with T_219 Quasisymmetry. Journal of Virology 79: 9236–9243.

Landa H, Bratbak G, Heldal M. 2004. Abundance and dynamics of free flagellate scales in marine costal ecosystems. Aquatic Microbial Ecology 37:55-62

Brussaard CPD, Noordeloos AAM, Sandaa R-A, Heldal M, Bratbak G. 2004. Discovery of a dsRNA virus infecting the marine photosynthetic protist Micromonas pusilla. Virology 319: 280-291.

Larsen, A., Fonnes, A., Sanda, R.-S., Casberg, T., Thyrhaug, R., Erga. SE., Jacquet, S and Bratbak, G. 2004.  Spring phytoplankton bloom dynamics in Norwegian coastal waters: Microbial community succession and diversity. Limnol. Oceanogr. 49:180-190.

Ruth-Anne Sandaa, Evy Foss Skjoldal and Gunnar Bratbak. 2003. Virioplankton community structure along a salinity gradient in a solar saltern. Extremophiles 7:347-351.

Thyrhaug. R., Larsen, A, Thingstad, TF, Bratbak, G. 2003. Stable coexistence in marine algal host-virus systems. Marine Ecology Progress Series. 254:27-35.

Stéphan Jacquet and Gunnar Bratbak. 2003. Effects of ultraviolet radiation on marine virus–phytoplankton interactions. FEMS Microbiology Ecology 44:279-289

Tonje Castberg, Runar Thyrhaug, Aud Larsen, Ruth-Anne Sandaa, Mikal Hedal, James L. Van Etten, Gunnar Bratbak. 2002. Isolation and characterization of a virus that infects Emiliania huxleyi (Haptophyceae). Journal of Phycology 38:767-774.

Vrede, K., Heldal, H., Norland, S. and Bratbak, G. 2002. The Elemental Composition (C, N, P) and Cell Volume of Expontially Growing and Nutrient Limited Bacterioplankton. Appl. Environ Microbiol. 68:2965-2971

Stéphan Jacquet, Mikal Heldal, Debora Iglesias-Rodriguez, Aud Larsen, William Wilson, Gunnar Bratbak. 2002.  Flow cytometric Analysis of an E. Huxleyi bloom terminated by viral infection. Aquatic Microbial Ecology 27:111-124.

Thyrhaug  R., Larsen, A, Brussaard, C.P.D., Bratbak, G. 2002. Cell cycle dependent virus production in marine phytoplankton. Journal of Phycology 38:338-343

Brussaard C, Marie D, Thyrhaug R, Bratbak G. 2001 Flow cytometric analysis of phytoplankton viability following viral infection. Aquat. Microb. Ecol. 26:157-166.

Ruth-Anne Sandaa, Mikal Heldal, Tonje Castberg, Runar Thyrhaug and Gunnar Bratbak. 2001. Isolation and characterization of two viruses with large genome size infecting Chrysochromulina ericina (Prymnesiophyceae) and Pyramimonas orientalis Prasinophyceae). Virology 290:272-280.

Larsen, A., Castberg, T., Sandaa, R-A., Brussaard, C., Egge, J., Heldal, M., Paulino, A., Thyrhaug, R., van Hannen, E. and Bratbak, G. (2001). Population dynamics and diversity of phytoplankton, bacteria and virus in a seawater enclosure. Mar. Ecol. Prog. Ser. 221:47-57.

Castberg, T., Larsen, A., Brussaard, C., Egge, J., Heldal, M., Sandaa, R-A., Thyrhaug, R., van Hannen, E. and Bratbak, G. (2001). Microbial population dynamics and diversity during blooms of the marine coccolithophorid Emiliania huxleyi (Haptophyta). Mar. Ecol. Prog. Ser. 221:39-46.

Ian Hewson, Judith M. O’Neil, Cynthia A. Heil, Gunnar Bratbak, William C. Dennison.  2001. Effects of Elevated Virus Abundance on Benthic Microbial Communities. Aquat. Microb. Ecol 25:1-10.

F. Rodríguez, E. Fernández, R.N. Head, D.S. Harbour, G. Bratbak, M. Heldal and R.P. Harris. 2000. Temporal variability of viruses, bacteria, phytoplankton and zooplankton in the western English Channel off Plymouth. J. Mar.Biol. Ass. UK. 80:575-586.

Brussaard, C.P.D., Marie, D. and Bratbak, G. 2000. Flow cytometric detection of viruses. Journal of Virological Methods. 85:175-182

Brussaard C, Thyrhaug R, Marie D, and Bratbak G. 1999 Flow cytometric analysis of virus infection in two marine phytoplankton species, Micromonas pusilla (Prasinophyceae) and Phaeocystis pouchetii (Prymnesiophyceae). Journal of Phycology 35:941-948.

Dominique Marie, Corina P. D. Brussaard, Runar Thyrhaug, Gunnar Bratbak, and Daniel Vaulot. 1999.  Enumeration of Marine Viruses in Culture and Natural Samples by Flow Cytometry Appl. Envir. Microbiol. 65: 45-52.

Malin G., Wilson W.H., Bratbak G., Liss P.S. Mann N.H. 1998. Elevated production of dimethylsulfide resulting from viral infection of cultures of Phaeocystis pouchetii. Limnol. Oceanogr. 43:1389-1393.

Bratbak G, Jacobsen A, Heldal M. 1998. Viral lysis of Phaeocystis pouchetii and bacterial secondary production. Aquat. Microb. Ecol. 16:11-16.

Bratbak G, Jacobsen A, Heldal M, Nagasaki K, Thingstad F. 1998. Virus production in Phaeocystis pouchetii and its relation to host cell growth and nutrition. Aquat. Microb. Ecol. 16:1-9.

Oren A., Bratbak, G., and Heldal M. 1997. Occurrence of virus-like particles in the Dead Sea. Extremophiles 1:143-149.

Tuomi, P., Torsvik, T. Heldal, M. and. Bratbak, G. 1997. Bacterial population dynamics in a meromictic lake. Appl. Environ. Microbiol. 63:2181-2188.

Heldal, M., Norland, S., Fagerbakke, K.M., Thingstad, T.F and. Bratbak, G, 1997. The elemental composition of bacteria: a signature of growth condition. Marine Pollution Bulletin 33:3-9.

Guixa-Boixareu Nuria, Calderón-Paz Juan I., Heldal, Mikal, Bratbak, Gunnar, Pedrós-Alió Carlos. 1996. Viral lysis and bacterivory as procaryotic loss factors along a salinity gradient. Aquatic Microb. Ecol. 11:215-227.

Heldal, M., Fagerbakke, K.M., Tuomi, P., and. Bratbak, G. 1996.  Abundant populations of iron and manganese sequestering bacteria in coastal water. Aquatic Microbial Ecology. 11:127-133.

Jacobsen, A.,  Bratbak, G. and Heldal, M. 1996. Isolation and characterisation of a virus infecting Phaeocystis pouchetii (Prymnesiophyceae). J. Phycol. 32:923-927.

Bratbak, G., Heldal, M., Thingstad, T.F. and Tuomi, P. 1996.  Dynamics of virus abundance in coastal seawater. FEMS Microbiology Ecology. 19:263-269

Kjell Gundersen, Gunnar Bratbak and Mikal Heldal. 1996. Factors influencing the loss of bacteria in preserved seawater samples. Mar. Ecol. Prog. Ser. 137: 305-310.

Bratbak, G., Willson, W. and Heldal, M. 1996. Viral control of Emiliania huxleyi blooms? Journal of Marine Systems 9:75-81.

Bratbak, G., Levasseur, M.,  Michaud, S., Cantin, G., Fernández, E., Heimdal, B.R. and Heldal, M . 1995. Viral activity in relation to Emiliania huxleyi blooms: a possible mechanism of DMSP release? Mar. Ecol. Prog. Ser. 128:133-142.

Tuomi, P., Fagerbakke, K.M., Bratbak G. and Heldal, M. 1995. Nutritional enrichment of a microbial community: the effects on activity, elemental composition, community structure and virus production. FEMS Microbiology Ecology 16:123-134.

Bratbak, G., Heldal, M., and Thingstad, T. 1994. Viruses and the microbial loop. Microbial Ecology 28:209-221.

Heldal, M., S. Norland, B. Riemann and G. Bratbak. 1994. Determination of bacterial cell number and cell volume by means of flowcytometry, TEM and epifluorescence microscopy. Journal of Microbial Methods 20:255-263.

Thingstad,T.F., Heldal,M., Bratbak,G., and Dundas,I. 1993. Are viruses important partners in pelagic food webs? Trends in Ecology and Evolution. 8:209-213.

Bratbak, G., J.K. Egge and M. Heldal. 1993. Viral mortality of the marine alga Emiliania huxleyi (Haptophyceae) and termination of algal blooms. Mar. Ecol. Prog. Ser. 93:39-48.

Bratbak, G., Haslund, O.H., Heldal, M., Næss, A., and Røeggen, T. 1992. Giant marine viruses ? Mar. Ecol. Prog. Ser. 85:201-202.

Bratbak, G., M. Heldal, T.F. Thingstad, B. Riemann and O.H. Haslund. 1992. Incorporation of viruses into the budget of microbial C-transfer. A first approach. Mar. Ecol. Prog. Ser. 83:273-280.

Heldal, M. and G. Bratbak. 1991. Production and decay of viruses in marine waters. Mar. Ecol. Prog. Ser. 72: 205-212.

Bratbak, G., M. Heldal, S. Norland, and T.F. Thingstad. 1990. Viruses as partners in spring bloom microbial trophodynamics. Appl. Environ. Microbiol 56:1400-1405.

Børsheim, Y., G. Bratbak, and M. Heldal. 1990.  Enumeration and biomass estimation of planktonic bacteria and viruses by transmission electron microscopy. Appl. Environ. Microbiol. 56: 352-356.

Bergh, Ø., K.Y.Børsheim, G. Bratbak, and M. Heldal. 1989. High abundance of viruses found in aquatic environments. Nature 340: 467-468.

Bratbak, G. 1987. Carbon flow in an experimental microbial  ecosystem.  Mar. Ecol. Prog. Ser. 36: 267-276.

Børsheim, K.Y., and G. Bratbak. 1987.  Cell volume to cell carbon conversion factors for a bacterivorous Monas sp. enriched from seawater.  Mar. Ecol. Prog. Ser. 36: 171-175.

Bratbak, G., and T.F. Thingstad. 1985. Phytoplankton-bacteria interactions: an apparent paradox? Analysis of a model system with both competition and commensalism. Mar. Ecol. Prog. Ser. 25: 23-30.

Bratbak, G. 1985. Bacterial biovolume and biomass estimations. Appl. Environ. Microbiol. 49: 1488-1493.

Bratbak, G., and I. Dundas. 1984. Bacterial dry matter content and biomass estimations.  Appl. Environ. Microbiol. 48: 755-757.

Bratbak, G., M. Heldal, G. Knutsen T. Lien, and S. Norland. 1982. Correlation of dispersant effectiveness and toxicity of oil dispersants towards the alga Chlamydomonas reinhardti. Marine Pollution Bulletin 13: 351-353.

 

2020-24          CoPI: AQUACOSM-plus - Network of Leading Ecosystem Scale Experimental AQUAtic MesoCOSM Facilities Connecting Rivers, Lakes, Estuaries and Oceans in Europe and beyond

2019-23          CoPI: SIMPLEX - Exploring fractality in ecosystem organization – Developing scale-invariant theory for biodiversity and complexity based on simple laws of ecology.

2019-23          CoPI: VirVar - Uncovering key players for regulation of phytoplankton function and structure: lessons to be learned from algal virus-haptophyte coexistence.

2019-22          CoPI: Ridges - Safe Havens for ice-associated Flora and Fauna in a Seasonally ice-covered Arctic Ocean.

2018-23          Partner: The Nansen Legacy - scientific exploration and sustainable management beyond the ice edge.

2018-21          Partner: MIXsTRUCT - Impact of MIXotrophs on the sTRUCTure of the marine pelagic food web.

2018-21          Partner: VIROVAC: Filter-feeding mesozooplankton as uncharted accomplices in marine virus ecology.

2016-20          CoPI: Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean - AQUACOSM (H2020-INFRAIA, ca 770 to UIB).