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Irene Roalkvams bilde

Irene Roalkvam

Forsker, Forsøkskoordinator ved Marineholmen RASLab AS
Stiftelsen industrilaboratorium
  • E-postIrene.Roalkvam@ilab.no
  • Telefon+47 55 58 46 28
  • Besøksadresse
    Høyteknologisenteret i Bergen
    Thormøhlensgate 55
    5008 Bergen
    Rom 
    434A1
  • Postadresse
    Postboks 7800
    5020 Bergen

Marineholmen RASLab tilbyr forskning innen akvakultur på en helt ny måte. Vi har 12 moduler med resirkulerende akvakulturanlegg (RAS) som hver består av et 1000L kar og eget biofilter. Her er det mulig å utføre eksperimenter i parallelle kar og parallelle systemer, noe som kan gi både statistisk interessante studier og spennende resultater.

Vitenskapelig artikkel
  • 2020. A case study of biofilter activation and microbial nitrification in a marine recirculation aquaculture system for rearing Atlantic salmon (Salmo salar L.). Aquaculture Research. 1-11.
  • 2019. Profundibacter amoris gen. nov., sp. nov., a new member of the Roseobacter clade isolated from Loki's Castle Vent Field on the Arctic Mid-Ocean Ridge. International Journal of Systematic and Evolutionary Microbiology. 975-981.
  • 2019. Microbial Communities in a Flow-Through Fish Farm for Lumpfish (Cyclopterus lumpus L.) During Healthy Rearing Conditions. Frontiers in Microbiology.
  • 2019. Comparison of active biofilm carriers and commercially available inoculum for activation of biofilters in marine recirculating aquaculture systems (RAS). Aquaculture.
  • 2018. Genome analysis of Vallitalea guaymasensis strain L81 isolated from a deep-sea hydrothermal vent system. Microorganisms.
  • 2016. Novel barite chimneys at the Loki´s Castle vent field shed light on key factors shaping microbial communities and functions in hydrothermal systems. Frontiers in Microbiology.
  • 2016. Lutibacter profundi sp. nov., isolated from a deep-sea hydrothermal system on the Arctic Mid-Ocean Ridge and emended description of the genus Lutibacter. International Journal of Systematic and Evolutionary Microbiology. 2671-2677.
  • 2015. Physiological and genomic characterization of Arcobacter anaerophilus IR-1 reveals new metabolic features in Epsilonproteobacteria. Frontiers in Microbiology.
  • 2015. Hypnocyclicus thermotrophus gen. Nov., sp. nov. isolated from a microbial mat in a hydrothermal vent field. International Journal of Systematic and Evolutionary Microbiology. 4521-4525.
  • 2015. Functional interactions among filamentous Epsilonproteobacteria and Bacteroidetes in a deep-sea hydrothermal vent biofilm. Environmental Microbiology. 4063-4077.
  • 2015. Assessment of the carbon monoxide metabolism of the hyperthermophilic sulfate-reducing archaeon Archaeoglobus fulgidus VC-16 by comparative transcriptome analyses. Archaea. 12 sider.
  • 2014. Modeling of heavy nitrate corrosion in anaerobe aquifer injection water biofilm: A case study in a flow rig. Environmental Science and Technology. 8627-8635.
  • 2014. Identification of key components in the energy metabolism of Archaeoglobus fulgidus by transcriptome analyses. Frontiers in Microbiology.
  • 2013. The versatile in situ gene expression of an Epsilonproteobacteria-dominated biofilm from a hydrothermal chimney. Environmental Microbiology Reports. 282-290.
  • 2012. Integrated metagenomic and metaproteomic analyses of an ANME-1-dominated community in marine cold seep sediments. Environmental Microbiology. 1333-1346.
  • 2011. New insight into stratification of anaerobic methanotrophs in cold seep sediments. FEMS Microbiology Ecology. 233-243.
Faglig foredrag
  • 2020. Mikrobiell kolonisering av nytt marint RAS biofilter for post-smolt.
  • 2014. Towards a framework for analyses of how energy landscapes shape microbial communities in deep-sea hydrothermal systems.
  • 2014. Metagenomic study of a filamentous microbial mat from the Loki´s Castle Vent Field.
  • 2014. An Arcobacter strain with MIC potential isolated from injection water.
Populærvitenskapelig foredrag
  • 2018. Mikrobiell overvåkning av rognkjeksanlegg -prøvetaking og analyseverktøy.
  • 2014. Mikrobielle Teknikker.
Vitenskapelig foredrag
  • 2018. Monitoring the main changes in the bacterial community in a RAS biofilter during the first year of operation.
  • 2018. Mikrobiell overvåkning av rognkjeksanlegg ved omfattende prøvetaking og detaljert analyseverktøy.
  • 2018. Mikrobiell overvåkning av rognkjeksanlegg -prøvetaking og analyseverktøy.
  • 2015. Isolation, characterization and genome analysis of a nitrate reducing Arcobacter sp. isolated from saline aquifer water.
  • 2015. Isolation, characterization and genome analysis of a nitrate reducing Arcobacter sp.
  • 2014. Microbial communities associated with low-temperature venting barite chimneys in the Loki´s Castle black smoker field.
  • 2014. Microbial communities associated with low-temparture venting barite chimneys in the Loki´s Castle black smoker field.
  • 2012. PROTEOGENOMICS OF A MARINE SEDIMENT COMMUNITY DOMINATED BY ANME-1.
  • 2012. Exploring Metagenomes.
  • 2011. Microbial processes and biomineralisation associated with low-temperature venting and formation of barite chimneys at Loki's Castle hydrothermal field.
  • 2010. Microbial life associated with low-temperature hydrothermal venting and formation of barite chimneys at Loki’s Castle vent field.
  • 2010. A variety of microbial mats cover the chimney walls of the Loki's Castle hydrothermal field.
Doktorgradsavhandling
  • 2012. Diversity, stratification and in situ metabolism of anaerobic methanotrophic archaea in Nyegga cold seeps.
  • 2012. Diversity, stratification and in situ metabolism of anaerobic methanotrophic archaea in Nyegga cold seeps.
Poster
  • 2019. Microbial activation of biofilters in marine RAS -based on lab experiments and field observations.
  • 2019. Effect of UV water treatment on microbial community structure Studied in two different land based aquaculture systems.
  • 2015. New insights into energy conservation mechanisms in the sulfate respiring archaeon Archaeoglobus fulgidus VC16.
  • 2015. Metagenomics-based enzyme discovery.
  • 2015. Isolation, characterization and genome analysis of a nitrate reducing Arcobacter sp. isolated from injection water.
  • 2015. Heavy nitrate corrosion in anarobe aquifer injection water biofilm: Process modeling.
  • 2014. Isolation, characterization and genome analysis of a nitrate reducing Arcobacter sp. isolated from saline aquifer water.
  • 2014. Exploring the biotechnological potential of microbial communities in the Jan Mayen Vent Fields by use of in situ incubation chambers.
  • 2013. Microbial monitoring of Sub Sea injection water in the North Sea.
  • 2013. Exploring the biotechnological potential of microbial communities in the Jan Mayen Vent Fields by use of in situ incubation chambers.
  • 2013. Better handling of microbial influenced corrosion during operation.
  • 2012. Metatranscriptomic and phylogenetic analysis of bacterial mats growing on chimney surfaces at the Loki´s Castle hydrothermal field.
  • 2012. A combined SEM, isotope, and biomolecular study to unravel the formation of barite chimnneys at the Loki's Castle vent field.
  • 2010. Vertical variations in predominance of Thaumarchaeota and anaerobic methanotrophs in methane seep sediments.
  • 2010. Transcriptome analysis of Arhcaeoglobus fulgidus VC-16 grown on differential substrates.
  • 2010. The sulfate-methane transition zone (SMTZ) in passive and active gas hydrate bearing sediments at Nyegga on the Mid-Norwegian margin: a multidisciplinary geological, geobiological and geochemical study.
  • 2010. Microbial community structure of biomats and chimney walls of the Loki’s Castle hydrothermal field at 73°N.
  • 2010. Detection of methanotrophic archaea in a barite chimney at Loki’s Castle, the Arctic Mid-Ocean Ridge.
  • 2009. Decreased expression of ATP-sulfurylase and APS-reductase in Archaeoglobus fulgidus during respiration of hydrogen with thiosulfate.
  • 2008. The hyperthermophilic sulfate-reducing archaeon Archaeoglobus fulgidus; a proteomics study on the shift between chemoorganoheterotrophic and chemilithoautotrophic growth.
Vitenskapelig oversiktsartikkel/review
  • 2020. A case study of biofilter activation and microbial nitrification in a marine recirculation aquaculture system for rearing of Atlantic salmon (Salmo salar L.). 1-11.
Fagartikkel
  • 2018. Biofilterprosesser i endring over tid. Nf xpert : en spesialutgave av Norsk fiskeoppdrett. 46-48.

Se fullstendig oversikt over publikasjoner i CRIStin.

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Roalkvam, I., Drønen, K. (2016). Two case studies of corrosion from an injection water pipeline in the North Sea: Corrosion control due to operation management and high corrosion potential due to nitrate mitigation, Microbiologically Influenced Corrosion in the Upstream Oil and Gas Industry, editor: Lee, Skovhus and Enning, CRC Press Taylor & Francis, Florida US, ISBN 9781498726566.

Bauer, S.L.M., Roalkvam, I., Steen, I. H., Dahle, H. (2016). Lutibacter profundi sp. nov., isolated from a deep-sea hydrothermal system on the Arctic Mid-Ocean Ridge. International Journal of Systematic and Evolutionary Microbiology, 66:2671-2677.

Steen, I. H., Dahle, H., Stokke, R., Roalkvam, I., Daae, F. L., Rapp, H. T., Pedersen, R. B., Thorseth, I. H. (2016). Novel barite chimneys at the Loki´s Castle Vent Field shed light on key factors shaping microbial communities and functions in hydrothermal systems. Frontiers in Microbiology, doi: 10.3389/fmicb.2015.01510.

Roalkvam, I., Drønen, K., Stokke, R., Daae, F. L., Dahle, H., Steen, I. H. (2015). Physiological and genomic characterization of Arcobacter anaerophilus IR-1 reveals new metabolic features in Epsilonproteobacteria. Frontiers in Microbiology, 6:987.

Roalkvam, I., Bredy, F., Baumberger, T., Pedersen, R. B., Steen, I. H. (2015). Hypnocyclicus thermotrophus gen. nov. sp. nov. isolated from a microbial mat situated in a hydrothermal vent field in the Greenland Sea. International Journal of Systematic and Evolutionary Microbiology, doi:10.1099/ijsem.0.000606.

Hocking, W. P., Roalkvam, I., Magnussen, C., Stokke, R., Steen, I. H. (2015). Assessment of the carbon monoxide metabolism of the hyperthermophilic sulfate-reducing archaeon Archaeoglobus fulgidus VC-16 by comparative transcriptome analyses. Archaea, 2015:12.

Stokke, R., Dahle. H., Roalkvam, I., Wissuwa J., Daae, F. L., Tooming-Klunderud, A., Thorseth, I. H., Pedersen, R. B., Steen, I. H. (2015). Functional interactions among filamentous Epsilonproteobacteria and Bacteroidetes in deep-sea hydrothermal vent biofilm. Environmental Microbiology, doi:10.1111/1462-2920.12970.

Drønen, K., Roalkvam, I., Beeder, J., Torsvik, T., Steen, I. H., Skauge, A., Liengen T. (2014). Modeling of heavy nitrate corrosion in anaerobe aquifer injection water biofilm: a case study in a flow rig. Environmental Science and Technology, 15:8627-35.

Hocking, W. P., Stokke, R., Roalkvam, I., Steen, I. H. (2014). Identification of key components in the energy metabolism of the hyperthermophilic sulfate-reducing archaeon Archaeoglobus fulgidus by transcriptome analyses. Frontiers in Microbiology, 5:95.

Dahle, H., Roalkvam, I., Thorseth, I., Pedersen, R. B., Steen, I. H. (2013). The versatile in situ gene expression of an Epsilonproteobacteria-dominated biofilm from a hydrothermal chimney. Environmental Microbiology Reports, 2:282-90.

Roalkvam, I., Dahle, H., Chen, Y., Jørgensen, S. L., Haflidason, H. & Steen, I. H. (2012). Fine-scale community structure analysis of ANME in Nyegga sediments with high and low methane flux. Frontiers in Extreme Microbiology, 3:216.

Stokke, R., Roalkvam, I., Lanzén, A., Haflidason, H., Steen, I. (2012). Integrated metagenomic and metaproteomic analyses of an ANME-1 dominated community in marine cold-seep sediments. Environmental Microbiology, 13(5):1333-1346.

Roalkvam, I., Jørgensen, S. L., Chen, Y., Stokke, R., Dahle, H., Hocking, W. P., Lanzén, A., Haflidason, H., Steen, I. H. (2011). New insight into stratification of anaerobic methanotrophs in cold seep sediments. FEMS Microbiology Ecology, 78(2):233-43.

2017-: Adapting monitoring tools for bacterial load detection in closed marine fish farms: for improved fish health and reduced mortalities (MONITOR). Prosjektet er finansiert av Norsk Forskningsråd.

2015-2017: Industrial Applications of Marine Enzymes (INMARE); Innovative screening and expression platforms to discover and use the functional protein diversity from the sea. Prosjektet er finansiert av EU Horizon 2020. More info.

2012-2016: Better handling of microbial influnced corrosion during operation. Prosjektet er finansiert av VISTA.

2009-2012: Diversity, stratification and in situ metabolism of anaerobic methanotrophic archaea in Nyegga cold seeps. Ph.D project. Finansiert av VISTA.

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