World's Best Scientists 2026 revealed!
Gunnar Bratbak

Gunnar Bratbak

D-Index & Metrics

Microbiology

D-Index
55
Citations
15318
World Ranking
3772
National Ranking
14

Overview

Gunnar Bratbak is affiliated with the University of Bergen in Norway. Their research spans several fields within Environmental Science and Earth and Planetary Sciences, with a particular focus on Ecology, Oceanography, Molecular Biology, Atmospheric Science, and Environmental Chemistry.

They have contributed significantly to multiple topics, including:

  • Microbial Community Ecology and Physiology
  • Methane Hydrates and Related Phenomena
  • Arctic and Antarctic ice dynamics
  • Marine and coastal ecosystems
  • Environmental DNA in Biodiversity Studies
  • Protist diversity and phylogeny
  • Isotope Analysis in Ecology

Bratbak has an active publication record with numerous papers published in prominent venues. Frequent publication outlets include:

  • Progress In Oceanography
  • Elementa Science of the Anthropocene
  • Frontiers in Microbiology
  • Limnology and Oceanography
  • bioRxiv (Cold Spring Harbor Laboratory)

Recent papers authored or coauthored by Bratbak cover a variety of environmental and marine science topics. Examples include:

  • "Lateral Gene Transfer of Anion-Conducting Channelrhodopsins between Green Algae and Giant Viruses," 2020, Current Biology
  • "Still Arctic?-The changing Barents Sea," 2023, Elementa Science of the Anthropocene
  • "Phenology and Environmental Control of Phytoplankton Blooms in the Kong Håkon VII Hav in the Southern Ocean," 2021, Frontiers in Marine Science
  • "Earlier sea-ice melt extends the oligotrophic summer period in the Barents Sea with low algal biomass and associated low vertical flux," 2023, Progress In Oceanography
  • "Photosynthetic light requirement near the theoretical minimum detected in Arctic microalgae," 2024, Nature Communications

Frequent collaborators include researchers such as Aud Larsen, Oliver Müller, Ruth-Anne Sandaa, Melissa Chierici, and Rolf Gradinger. This network reflects collaboration across marine and environmental science disciplines.

Best Publications

  • High abundance of viruses found in aquatic environments.

    Øivind Bergh;Knut Yngve BØrsheim;Knut Yngve BØrsheim;Gunnar Bratbak;Mikal Heldal

  • Bacterial dry matter content and biomass estimations.

    Gunnar Bratbak;I. Dundas

  • Enumeration of Marine Viruses in Culture and Natural Samples by Flow Cytometry

    Dominique Marie;Corina P. D. Brussaard;Runar Thyrhaug;Gunnar Bratbak

  • Viral mortality of the marine alga Emiliania huxleyi (Haptophyceae) and termination of algal blooms

    G. Bratbak;JK Egge;M. Heldal

  • Bacterial biovolume and biomass estimations.

    Gunnar Bratbak

  • Cell volume to cell carbon conversion factors for a bacterivorous Monas sp. enriched from seawater

    KY Borsheim;G. Bratbak

  • Viruses as partners in spring bloom microbial trophodynamics.

    Gunnar Bratbak;Mikal Heldal;Svein Norland;T. Frede Thingstad

  • Enumeration and biomass estimation of planktonic bacteria and viruses by transmission electron microscopy.

    K Y Børsheim;G Bratbak;M Heldal

  • Elemental Composition (C, N, P) and Cell Volume of Exponentially Growing and Nutrient-Limited Bacterioplankton

    Katarina Vrede;Mikal Heldal;Svein Norland;Gunnar Bratbak

  • Production and decay of viruses in aquatic environments

    M. Heldal;G. Bratbak

  • Flow cytometric detection of viruses.

    Corina P.D. Brussaard;Dominique Marie;Gunnar Bratbak

  • Global-scale processes with a nanoscale drive: the role of marine viruses

    Corina P.D. Brussaard;Steven W. Wilhelm;T. Frede Thingstad;Markus G. Weinbauer

  • Viral lysis and bacterivory as prokaryotic loss factors along a salinity gradient

    Guixa-Boixareu N;Calderón-Paz Ji;Heldal M;Bratbak G

  • Incorporation of viruses into the budget of microbial C-transfer A first approach

    G. Bratbak;M. Heldal;TF Thingstad;B. Riemann

  • VIRUSES AND THE MICROBIAL LOOP

    G. Bratbak;F. Thingstad;M. Heldal

  • Flow cytometric analysis of an Emiliana huxleyi bloom terminated by viral infection

    Stéphan Jacquet;Mikal Heldal;Debora Iglesias-Rodriguez;Aud Larsen

  • Counterintuitive carbon-to-nutrient coupling in an Arctic pelagic ecosystem

    T. F. Thingstad;R. G. J. Bellerby;R. G. J. Bellerby;G. Bratbak;K. Y. Børsheim

  • Occurrence of virus-like particles in the Dead Sea.

    Aharon Oren;Gunnar Bratbak;Mikal Heldal

  • Elevated production of dimethylsulfide resulting from viral infection of cultures of Phaeocystis pouchetii

    Gillian Malin;William H. Wilson;Gunnar Bratbak;Peter S. Liss

  • ISOLATION AND CHARACTERIZATION OF A VIRUS INFECTING PHAEOCYSTIS POUCHETII (PRYMNESIOPHYCEAE)1

    Anita Jacobsen;Gunnar Bratbak;Mikal Heldal

  • Isolation and characterization of two viruses with large genome size infecting Chrysochromulina ericina (Prymnesiophyceae) and Pyramimonas orientalis (Prasinophyceae).

    Ruth-Anne Sandaa;Mikal Heldal;Tonje Castberg;Runar Thyrhaug

Frequent Co-Authors

Aud Larsen
Aud Larsen NORCE Research
Corina P. D. Brussaard
Corina P. D. Brussaard Utrecht University
T. Frede Thingstad
T. Frede Thingstad University of Bergen
Stéphan Jacquet
Stéphan Jacquet INRAE : Institut national de recherche pour l'agriculture, l'alimentation et l'environnement
Lise Øvreås
Lise Øvreås University of Bergen
Hiroyuki Ogata
Hiroyuki Ogata Kyoto University
Dominique Marie
Dominique Marie Sorbonne University
Richard G. J. Bellerby
Richard G. J. Bellerby East China Normal University
Jean-Michel Claverie
Jean-Michel Claverie Aix-Marseille University
Melissa Chierici
Melissa Chierici University Centre in Svalbard

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Studying Microbiology in the USA opens doors to various related online degrees and diverse career paths. For those interested in healthcare administration, pursuing the quickest medical billing and coding certificate online can be a fast and flexible option to enter the medical field without extensive time commitments.

If you are aiming for a broader medical knowledge base, exploring online medical degrees offers a convenient way to enhance your qualifications while balancing other responsibilities. These programs often provide foundational skills applicable in microbiology-related healthcare roles.

Public health is another vital area connected to microbiology, and enrolling in some of the easiest MPH online programs to get into makes entering this promising field more accessible. Such degrees can lead to impactful positions in disease control and prevention.

For those looking into specialized support roles, understanding how much does a child life specialist make can inform choices about careers that blend healthcare knowledge with patient interaction, an increasingly significant area for microbiology graduates in clinical settings.

Best Scientists Citing Gunnar Bratbak

Trending Scientists

Recently Published Articles