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Aud Larsen

Research Director Molecular Ecology

+47 56 10 74 24
Nygårdsgaten 112, 5008 Bergen, Norway

I want to find out more about the aquatic environment with special focus on marine pelagic food webs. I focus on the smallest organisms like phytoplankton, bacteria and virus. The aim of my research is to understand how interactions between these organisms work and how they are affected by current environmental changes as climate changes.

The practical part of my work takes place in lab, filed and at research cruises. Especially I have taken advantage of experimental systems called mesocosms. These are (sea)water enclosures big enough to capture the lower parts of the marine food web and they can be controlled and manipulated in order to study how environmental changes affect marine pelagic ecosystems.

My technical expertise is flow cytometry for detection and analyses of single cells organisms.

Aud Larsen


Climate & Environment

Research Groups

Molecular Ecology and Paleogenomics - MEP

More information about Aud

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Open CV


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Phaeoviruses Present in Cultured and Natural Kelp Species, Saccharina latissima and Laminaria hyperborea (Phaeophyceae, Laminariales), in Norway – Viruses 2023
Still Arctic? — The changing Barents Sea – Elementa: Science of the Anthropocene 2023
The use of eDNA and DNA based methods to assess and monitor alien and doorknocker species – Norwegian Environment Agency 2023
Differential toxicity of bioorthogonal non-canonical amino acids (BONCAT) in Escherichia coli – Journal of Microbiological Methods 2023
Viral infection switches the balance between bacterial and eukaryotic recyclers of organic matter during coccolithophore blooms – Nature Communications 2023
Multiomics in the central Arctic Ocean for benchmarking biodiversity change – PLoS Biology 2022
Arctic Paleoceanography Cruise KH21-234 with R/V Kronprins Haakon – NORCE Norwegian Research Centre 2022
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 – Earth System Science Data 2021
Flow Cytometric Analysis of Bacterial Protein Synthesis: Monitoring Vitality After Water Treatment – Frontiers in Microbiology 2021
How microbial food web interactions shape the arctic ocean bacterial community revealed by size fractionation experiments – Microorganisms 2021
MetaMon final project report - High-throughput metabarcoding of eukaryotic diversity for environmental monitoring of marine sediments – NORCE Norwegian Research Centre 2021
Removal of large viruses and their dispersal through fecal pellets of the appendicularian Oikopleura dioica during Emiliania huxleyi bloom conditions – Limnology and Oceanography 2021
Kunnskapsstatus for bruk av molekylære verktøy i kartlegging og overvåkning av biologisk mangfold i marine miljø – Miljødirektoratet 2021
Implementation of Environmental DNA (eDNA) as a Tool for Ecosystem-Based Fisheries Management – U.S. Department of Commerce, NOAA 2020
The Possession of Coccoliths Fails to Deter Microzooplankton Grazers – Frontiers in Marine Science 2020
Reproducing the virus-to-copepod link in Arctic mesocosms using host fitness optimization. – Limnology and Oceanography 2020
High CO2 concentration and iron availability determine the metabolic inventory in an Emiliania huxleyi-dominated phytoplankton community – Environmental Microbiology 2020
Bioorthogonal Non-canonical Amino Acid Tagging Combined With Flow Cytometry for Determination of Activity in Aquatic Microorganisms – Frontiers in Microbiology 2020
Kriterier for lagring av miljø-DNA prøver og data, herunder henvisning til referansemateriale. Criteria for depositing eDNA samples and data, including vouchered specimens – Miljødirektoratet 2020
Incubation in light versus dark affects the vitality of UV-irradiated Tetraselmis suecica differently: A flow cytometric study – Marine Pollution Bulletin 2019
The potential of sedimentary ancient DNA for reconstructing past sea ice evolution – The ISME Journal 2019
Comparing flow cytometry and microscopy in the quantification of vital aquatic organisms in ballast water – Journal of Marine Engineering & Technology 2018
Biological transformation of Arctic dissolved organic matter in a NE Greenland fjord – Limnology and Oceanography 2018
Seasonality drives microbial community structure, shaping both eukaryotic and prokaryotic host–viral relationships in an Arctic marine ecosystem – Viruses 2018
Asynchronous Accumulation of Organic Carbon and Nitrogen in the Atlantic Gateway to the Arctic Ocean – Frontiers in Marine Science 2018
Bacterial community composition responds to changes in copepod abundance and alters ecosystem function in an Arctic mesocosm study – The ISME Journal 2018
Simple models combining competition, defence and resource availability have broad implications in pelagic microbial food webs – Ecology Letters 2018
Seasonal and annual variability in the phytoplankton community of the Raunefjord, west coast of Norway from 2001-2006 – Marine Biology Research 2018
Increased CO2 and iron availability effects on carbon assimilation and calcification on the formation of Emiliania huxleyi blooms in a coastal phytoplankton community – Environmental and Experimental Botany 2018
Phytoplankton Blooms at Increasing Levels of Atmospheric Carbon Dioxide: Experimental Evidence for Negative Effects on Prymnesiophytes and Positive on Small Picoeukaryotes – Frontiers in Marine Science 2017
Carbon bioavailability in a high Arctic fjord influenced by glacial meltwater, NE Greenland. – Frontiers in Marine Science 2017
Application of flow cytometry in ballast water analysis - biological aspects – Management of Biological Invasions 2017
Viruses on the menu: The appendicularian Oikopleura dioica efficiently removes viruses from seawater – Limnology and Oceanography 2017
Competitive fitness of a predominant pelagic calcifier impaired by ocean acidification – Nature Geoscience 2017
Viruses on the menu: The appendicularian Oikopleura dioica efficiently removes viruses from seawater – Limnology and Oceanography 2017
The response of heterotrophic prokaryote and viral communities to labile organic carbon inputs is controlled by the predator food chain structure – Viruses 2017
Emerging interaction patterns in the Emiliania huxleyi-EhV system – Viruses 2017
Seasonal dynamics of haptophytes and dsDNA algal viruses suggest complex virus-host relationship – Viruses 2017
Iron availability modulates the effects of future CO2 levels within the marine planktonic food web – Marine Ecology Progress Series 2017
Nye bakterier beveger seg inn i arktiske farvann – Forskning.no 2017
Dampened copepod-mediated trophic cascades in a microzooplankton-dominated microbial food web: A mesocosm study – Limnology and Oceanography 2017
Ocean acidification reduces transfer of essential biomolecules in a natural plankton community – Scientific Reports 2016
Influence of plankton community structure on the sinking velocity of marine aggregates – Global Biogeochemical Cycles 2016
Metabarcoding and metabolome analyses of copepod grazing reveal feeding preference and linkage to metabolite classes in dynamic microbial plankton communities – Molecular Ecology 2016
Dual staining with CFDA-AM and SYTOX Blue in flow cytometry analysis of UV-irradiated Tetraselmis suecica to evaluate vitality – Aquatic Biology 2016
Synechococcus in the Atlantic Gateway to the Arctic Ocean – Frontiers in Marine Science 2016
Molecular gut content analysis demonstrates that Calanus grazing on Phaeocystis pouchetii and Skeletonema marinoi is sensitive to bloom phase but not prey density – Marine Ecology Progress Series 2016
Ultraviolet radiation as a ballast water treatment strategy: Inactivation of phytoplankton measured with flow cytometry – Marine Pollution Bulletin 2016
A simple adjustment to test reliability of bacterivory rates derived from the dilution method – Limnology and Oceanography : Methods 2015
Contrasting response to nutrient manipulation in Arctic mesocosms are reproduced by a minimum microbial food web model – Limnology and Oceanography 2015
Underestimation of microzooplankton grazing in dilution experiments due to inhibition of phytoplankton growth – Limnology and Oceanography 2015
Flow cytometric applicability to evaluate UV inactivation of phytoplankton in marine water samples – Marine Pollution Bulletin 2015
Seasonal diversity and dynamics of haptophytes in the Skagerrak, Norway, explored by high-throughput sequencing – Molecular Ecology 2015
Characterisation of three novel giant viruses reveals huge diversity among viruses infecting Prymnesiales (Haptophyta) – Virology 2015
Virus infection of Haptolina ericina and Phaeocystis pouchetii implicates evolutionary conservation of programmed cell death induction in marine haptophyte-virus interactions – Journal of Plankton Research 2014
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