Hjem
Håkon Dahles bilde

Håkon Dahle

Førsteamanuensis
  • E-postHakon.Dahle@uib.no
  • Telefon+47 55 58 38 61+47 911 12 246
  • Besøksadresse
    Thormøhlensgt. 53 A/B
  • Postadresse
    Postboks 7803
    5020 Bergen

I am a microbial ecologist interested in how natural and human drivers affect populations, communities and ecosystems at different spatial and temporal scales. My research is centered around the following research questions:

How is microbial community structure and diversiy shaped by chemical power supply?

What is the connection between the geological setting, geochemistry, and microbial ecology of hydrothermal systems?

How does marine mine tailings in Norwegian fjords affect microbial life?

What is the optimal microbial community structure in land-based fish farms (RAS), and how to maintain it?

To address these questions we make use of population dynamic models, field observations, and statistical analyses. A central part of our work is also bioinformatic analyses of next generation sequencing data.

Please make contact if you are interested in a PhD, MSc, or a Bachelor project connected to any of these themes.

  

 

 

Vitenskapelig artikkel
  • Le Moine Bauer, Sven; Sjøberg, Andreas Gilje; L´Haridon, Stephane; Stokke, Runar; Roalkvam, Irene; Steen, Ida Helene; Dahle, Håkon. 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.
  • Roalkvam, Irene; Drønen, Karine; Dahle, Håkon; Wergeland, Heidrun Inger. 2019. Microbial Communities in a Flow-Through Fish Farm for Lumpfish (Cyclopterus lumpus L.) During Healthy Rearing Conditions. Frontiers in Microbiology.
  • Le Moine Bauer, Sven; Stensland, Anne; Daae, Frida Lise; Sandaa, Ruth-Anne; Thorseth, Ingunn Hindenes; Steen, Ida Helene; Dahle, Håkon. 2018. Water masses and depth structure prokaryotic and T4-like viral communities around hydrothermal systems of the Nordic Seas. Frontiers in Microbiology. 1-17.
  • Dahle, Håkon; Le Moine Bauer, Sven; Baumberger, Tamara; Stokke, Runar; Pedersen, Rolf B.; Thorseth, Ingunn Hindenes; Steen, Ida Helene. 2018. Energy landscapes in hydrothermal chimneys shape distribution of primary producers. Frontiers in Microbiology.
  • Vander Roost, Jan Pieter; Daae, Frida Lise; Steen, Ida Helene; Thorseth, Ingunn Hindenes; Dahle, Håkon. 2018. Distribution patterns of iron-oxidizing Zeta- and Beta-Proteobacteria from different environmental settings of the Jan Mayen vent fields. Frontiers in Microbiology.
  • Johannessen, Karen Cecilie; Vander Roost, Jan Pieter; Dahle, Håkon; Dundas, Siv Hjorth; Pedersen, Rolf B.; Thorseth, Ingunn Hindenes. 2017. Environmental controls on biomineralization and Fe-mound formation in a low-temperature hydrothermal system at the Jan Mayen Vent Fields. Geochimica et Cosmochimica Acta. 101-123.
  • Hestetun, Jon Thomassen; Dahle, Håkon; Jørgensen, Steffen Leth; Olsen, Bernt Rydland; Rapp, Hans Tore. 2016. The Microbiome and Occurrence of Methanotrophy in Carnivorous Sponges. Frontiers in Microbiology. 1-14.
  • Steen, Ida Helene; Dahle, Håkon; Stokke, Runar; Roalkvam, Irene; Daae, Frida Lise; Rapp, Hans Tore; Pedersen, Rolf B.; Thorseth, Ingunn Hindenes. 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.
  • Le Moine Bauer, Sven; Roalkvam, Irene; Steen, Ida Helene; Dahle, Håkon. 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.
  • Lin, T. Jennifer; Ver Eecke, Helene C.; Breves, Elly A.; Dyar, Melinda Darby; Jamieson, John William; Hannington, Mark D.; Dahle, Håkon; Bishop, Janice L.; Lane, Melissa D.; Butterfield, David A.; Kelley, Deborah S; Lilley, Marvin D.; Baross, John A.; Holden, James F. 2016. Linkages between mineralogy, fluid chemistry, and microbial communities within hydrothermal chimneys from the Endeavour Segment, Juan de Fuca Ridge. Geochemistry Geophysics Geosystems. 300-323.
  • Roalkvam, Irene; Drønen, Karine; Stokke, Runar; Daae, Frida Lise; Dahle, Håkon; Steen, Ida Helene. 2015. Physiological and genomic characterization of Arcobacter anaerophilus IR-1 reveals new metabolic features in Epsilonproteobacteria. Frontiers in Microbiology.
  • Stokke, Runar; Dahle, Håkon; Roalkvam, Irene; Wissuwa, Juliane; Daae, Frida Lise; Tooming-Klunderud, Ave; Thorseth, Ingunn Hindenes; Pedersen, Rolf B.; Steen, Ida Helene. 2015. Functional interactions among filamentous Epsilonproteobacteria and Bacteroidetes in a deep-sea hydrothermal vent biofilm. Environmental Microbiology. 4063-4077.
  • Nesbø, Camilla Lothe; Swithers, Kirsten S.; Dahle, Håkon; Haverkamp, Thomas Hendricus Augustus; Birkeland, Nils-Kåre; Sokolova, Tatiana; Kublanov, Ilya; Zhaxybayeva, Olga. 2015. Evidence for extensive gene flow and Thermotoga subpopulations in subsurface and marine environments. The ISME Journal. 1532-1542.
  • Dahle, Håkon; Økland, Ingeborg Elisabet; Thorseth, Ingunn Hindenes; Pedersen, Rolf B.; Steen, Ida Helene. 2015. Energy landscapes shape microbial communities in hydrothermal systems on the Arctic Mid-Ocean Ridge. The ISME Journal. 1593-1606.
  • Dahle, Håkon; Roalkvam, Irene; Pedersen, Rolf B.; Thorseth, Ingunn Hindenes; Steen, Ida Helene. 2013. The versatile in situ gene expression of an Epsilonproteobacteria-dominated biofilm from a hydrothermal chimney. Environmental Microbiology Reports. 282-290.
  • Økland, Ingeborg Elisabet; Huang, Shanshan; Dahle, Håkon; Thorseth, Ingunn Hindenes; Pedersen, Rolf B. 2012. Low temperature alteration of serpentinized ultramafic rock and implications for microbial life. Chemical Geology. 75-87.
  • Roalkvam, Irene; Dahle, Håkon; Chen, Yifeng; Jørgensen, Steffen Leth; Haflidason, Haflidi; Steen, Ida Helene. 2012. Fine-scale community structure analysis of ANME in Nyegga sediments with high and low methane flux. Frontiers in Microbiology. 1-13.
  • Roalkvam, Irene; Jørgensen, Steffen Leth; Chen, Yifeng; Stokke, Runar; Dahle, Håkon; Hocking, William Peter; Lanzén, Anders; Haflidason, Haflidi; Steen, Ida Helene. 2011. New insight into stratification of anaerobic methanotrophs in cold seep sediments. FEMS Microbiology Ecology. 233-243.
  • Dahle, Håkon; Hannisdal, Bjarte; Steinsbu, Bjørn Olav; Ommedal, Hege; Einen, Jørn; Jensen, Sigmund; Larsen, Øivind; Øvreås, Lise; Norland, Svein. 2011. Evolution of temperature optimum in Thermotogaceae and the prediction of trait values of uncultured organisms. Extremophiles. 509-516.
  • Nesbø, Camilla L.; Bapteste, Eric; Curtis, Bruce; Dahle, Håkon; Lopez, Philippe; Macleod, Dave; Dlutek, Marlena; Bowman, Sharen; Zhaxybayeva, Olga; Birkeland, Nils-Kåre; Doolittle, W. Ford. 2009. The Genome of Thermosipho africanus TCF52B: Lateral Genetic Connections to the Firmicutes and Archaea. Journal of Bacteriology. 1974-1978.
  • DiPippo, Jonathan L.; Nesbø, Camilla L.; Dahle, Håkon; Doolittle, W. Ford; Birkeland, Nils-Kåre; Noll, Kenneth M. 2009. Kosmotoga olearia gen. nov., sp nov., a thermophilic, anaerobic heterotroph isolated from an oil production fluid. International Journal of Systematic and Evolutionary Microbiology. 2991 -3000.
  • Lu, Ming; Grøv, Eivind; Dahle, Håkon; Qiao, Huaiyu; Wen, Banghou; Chen, Zhongming; Zhao, Qiulin. 2008. Rock support design for special lighting caverns in high in-situ stress rock mass. Chinese Journal of Rock Mechanics and Engineering.
  • Dahle, Håkon; Garshol, Frøydis Kristi; Madsen, Marit Steine; Birkeland, Nils-Kåre. 2008. Microbial community structure analysis of produced water from a high-temperature North Sea oil-field. Antonie van Leeuwenhoek. International Journal of General and Molecular Microbiology. 37-49.
  • Dahle, Håkon; Birkeland, Nils-Kåre. 2006. Thermovirga lienii gen. nov., sp. nov., a novel moderately thermophilic, anaerobic, amino-acid-degrading bacterium isolated from a North Sea oil well. International Journal of Systematic and Evolutionary Microbiology. 1539-1545.
Faglig foredrag
  • Dahle, Håkon; Økland, Ingeborg Elisabet; Roalkvam, Irene; Thorseth, Ingunn Hindenes; Pedersen, Rolf B.; Steen, Ida Helene. 2014. Towards a framework for analyses of how energy landscapes shape microbial communities in deep-sea hydrothermal systems.
  • Stokke, Runar; Dahle, Håkon; Roalkvam, Irene; Daae, Frida Lise; Thorseth, Ingunn Hindenes; Pedersen, Rolf B.; Steen, Ida Helene. 2014. Metagenomic study of a filamentous microbial mat from the Loki´s Castle Vent Field.
Vitenskapelig foredrag
  • Olsen, Linn Merethe Brekke; Kutti, Tina; Dahle, Håkon; Haflidason, Haflidi; Thorseth, Ingunn Hindenes. 2019. Biogeochemical processes in submarine mine tailings and the impact on benthic fauna.
  • Drønen, Karine; Roalkvam, Irene; Nilsen, Hanne Katrine; Olsen, A.B.; Olsen, Anne Berit; Dahle, Håkon; Wergeland, Heidrun Inger. 2018. Monitoring the main changes in the bacterial community in a RAS biofilter during the first year of operation.
  • Roalkvam, Irene; Drønen, Karine; Dahle, Håkon; Wergeland, Heidrun Inger. 2018. Mikrobiell overvåkning av rognkjeksanlegg ved omfattende prøvetaking og detaljert analyseverktøy.
  • Roalkvam, Irene; Drønen, Karine; Wergeland, Heidrun Inger; Dahle, Håkon. 2018. Mikrobiell overvåkning av rognkjeksanlegg -prøvetaking og analyseverktøy.
  • Økland, Ingeborg Elisabet; Dahle, Håkon; Thorseth, Ingunn Hindenes; Pedersen, Rolf B. 2016. Weathering of sulphides at the Arctic Mid-Ocean Ridge.
  • Økland, Ingeborg Elisabet; Gravdal, Julianne K.S.; Kvassnes, Astri J.S.; Dahle, Håkon; Thorseth, Ingunn Hindenes. 2016. Mobilization of heavy metals in submarine mine tailings.
  • Johannessen, Karen Cecilie; Vander Roost, Jan Pieter; Dahle, Håkon; Dundas, Siv Hjorth; Pedersen, Rolf B.; Thorseth, Ingunn Hindenes. 2016. Local environmental controls on microbial Fe(II)-oxidation in seafloor hydrothermal deposits.
  • Dahle, Håkon; Økland, Ingeborg Elisabet; Thorseth, Ingunn Hindenes; Pedersen, Rolf B.; Steen, Ida Helene. 2014. Use of metatranscriptomics, amplicon pyrosequencing and thermodynamics to assess how microbial communities are shaped by energy availability.
  • Steen, Ida Helene; Dahle, Håkon; Roalkvam, Irene; Stokke, Runar; Thorseth, Ingunn Hindenes; Pedersen, Rolf B. 2014. Microbial communities associated with low-temperature venting barite chimneys in the Loki´s Castle black smoker field.
  • Steen, Ida Helene; Dahle, Håkon; Roalkvam, Irene; Stokke, Runar; Thorseth, Ingunn Hindenes; Pedersen, Rolf B. 2014. Microbial communities associated with low-temparture venting barite chimneys in the Loki´s Castle black smoker field.
  • Dahle, Håkon; Økland, Ingeborg Elisabet; Thorseth, Ingunn Hindenes; Pedersen, Rolf B.; Steen, Ida Helene. 2014. Energy landscapes shape microbial communities and the distribution of biosignatures in hydrothermal systems on the Arctic Mid-Ocean Ridge.
  • Dahle, Håkon; Økland, Ingeborg Elisabet; Pedersen, Rolf B.; Thorseth, Ingunn Hindenes; Steen, Ida Helene. 2013. Thermodynamic constraints on the microbial ecology and biogeochemical cycling in deep-sea hydrothermal systems.
  • Thorseth, Ingunn Hindenes; Eickmann, Benjamin; Steen, Ida Helene; Dahle, Håkon; Baumberger, Tamara; Peters, M; Strauss, Harald; Pedersen, Rolf B. 2013. Formation of barite chimneys at low-temperature hydrothermal venting: evidence for complex geobio-interactions.
  • Stokke, Runar; Dahle, Håkon; Steen, Ida Helene. 2012. Metagenomics of arctic hydrothermal vent biofilms.
  • Thorseth, Ingunn Hindenes; Steen, Ida Helene; Roalkvam, Irene; Dahle, Håkon; Stokke, Runar; Rapp, Hans Tore; Pedersen, Rolf B. 2011. Microbial processes and biomineralisation associated with low-temperature venting and formation of barite chimneys at Loki's Castle hydrothermal field.
  • Dahle, Håkon; Roalkvam, Irene; Jørgensen, Steffen Leth; Stokke, Runar; Thorseth, Ingunn Hindenes; Pedersen, Rolf B.; Steen, Ida Helene. 2010. A variety of microbial mats cover the chimney walls of the Loki's Castle hydrothermal field.
  • Dahle, Håkon; Garshol, Frøydis; Madsen, Marit; Birkeland, Nils-Kåre. 2003. Treasures in the deep biosphere of North Sea oil-wells.
  • Bjørgo, Ole Christian; Lien, Torleiv; Madsen, Marit; Dahle, Håkon; Birkeland, Nils-Kåre. 2000. Thermosipho strain TBA5, a new thermophilic anaerobic bacterium, isolated from a North Sea oil field.
  • Bjørgo, Ole Christian; Lien, Torleiv; Madsen, Marit Steine; Dahle, Håkon; Birkeland, Nils-Kåre. 2000. Thermosipho strain TBA5, a new thermophilic anaerobic bacterium, isolated from a North Sea oil field.
Hovedfagsoppgave
  • Dahle, Håkon. 2001. Karakterisering av en bakteriestamme fra ordenen Thermotogales, isolert fra et oljereservoar i Nordsjøen.
Doktorgradsavhandling
  • Vander Roost, Jan Pieter. 2018. Iron-Oxidizing Microorganisms at the Jan Mayen Hydrothermal Vent Fields.
  • Dahle, Håkon. 2007. Microbiological analyses of produced water from a high-temperature oil formation in the North-Sea.
Poster
  • Roalkvam, Irene; Drønen, Karine; Dahle, Håkon; Wergeland, Heidrun Inger. 2019. Microbial activation of biofilters in marine RAS -based on lab experiments and field observations.
  • Drønen, Karine; Roalkvam, Irene; Dahle, Håkon; Nilsen, Hanne Katrine; Olsen, Anne Berit; Wergeland, Heidrun Inger. 2019. Effect of UV water treatment on microbial community structure Studied in two different land based aquaculture systems.
  • Roalkvam, Irene; Stokke, Runar; Drønen, Karine; Steen, Ida Helene; Dahle, Håkon. 2015. Isolation, characterization and genome analysis of a nitrate reducing Arcobacter sp. isolated from injection water.
  • Le Moine Bauer, Sven; Steen, Ida Helene; Sandaa, Ruth-Anne; Pedersen, Rolf B.; Dahle, Håkon. 2014. Microbial community changes within a chimney wall at the basalt-hosted Jan Mayen vent field (JMVF):Modeled predictions vs. Pyrosequencing data.
  • Steen, Ida Helene; Stokke, Runar; Wissuwa, Juliane; Steinsbu, Bjørn Olav; Roalkvam, Irene; Dahle, Håkon; Pedersen, Rolf B. 2014. Exploring the biotechnological potential of microbial communities in the Jan Mayen Vent Fields by use of in situ incubation chambers.
  • Vander Roost, Jan Pieter; Thorseth, Ingunn Hindenes; Pedersen, Rolf B.; Steen, Ida Helene; Dahle, Håkon. 2014. Comparison of microbial communities within iron-containing mats at different geochemical settings in the Jan Mayen vent field.
  • Gravdal, Julianne K.S.; Økland, Ingeborg Elisabet; Dahle, Håkon; Kvassnes, Astri Jæger; Thorseth, Ingunn Hindenes. 2013. Stability of heavy metals in submarine tailings: A geochemical and microbiological study.
  • Steen, Ida Helene; Julianne, Wissuwa; Steinsbu, Bjørn Olav; Roalkvam, Irene; Dahle, Håkon; Pedersen, Rolf B. 2013. Exploring the biotechnological potential of microbial communities in the Jan Mayen Vent Fields by use of in situ incubation chambers.
  • Thorseth, Ingunn Hindenes; Steen, Ida Helene; Eickmann, Benjamin; Dahle, Håkon; Baumberger, Tamara; Peters, M; Strauss, H.; Pedersen, Rolf B. 2012. Microbial mediated formation of low-temperature hydrothermal barite chimneys.
  • Dahle, Håkon; Roalkvam, Irene; Thorseth, Ingunn Hindenes; Pedersen, Rolf B.; Steen, Ida Helene. 2012. Metatranscriptomic and phylogenetic analysis of bacterial mats growing on chimney surfaces at the Loki´s Castle hydrothermal field.
  • Økland, Ingeborg Elisabet; Daae, F.L; Dahle, Håkon; Thorseth, Ingunn Hindenes; Pedersen, Rolf B. 2012. Low temperature alteration of ultramafic rock sustaining associated microbial communities.
  • Møller, Kirsten; Schoenberg, R; Thorseth, Ingunn Hindenes; Dahle, Håkon; Pedersen, Rolf B. 2012. Combined spectroscopic, microscopic and DNA analyses of hydrothermal siliceous Fe despots.
  • Dahle, Håkon; Roalkvam, Irene; Jørgensen, Steffen Leth; Hoem, Solveig; Mitra, Suparna; Huson, Daniel; Tooming-Klunderud, Ave ; Thorseth, Ingunn Hindenes; Pedersen, Rolf-Birger; Steen, Ida Helene. 2010. Microbial community structure of biomats and chimney walls of the Loki’s Castle hydrothermal field at 73°N.
  • Hoem, Solveig; Dahle, Håkon; Roalkvam, Irene; Thorseth, Ingunn Hindenes; Pedersen, Rolf-Birger; Steen, Ida Helene. 2010. Detection of methanotrophic archaea in a barite chimney at Loki’s Castle, the Arctic Mid-Ocean Ridge.
  • DiPippo, Jonathan L.; Nesbø, Camilla L.; Dahle, Håkon; Doolittle, W. Ford; Birkeland, Nils-Kåre; Noll, Kenneth M. 2008. Kosmotoga olearia gen. nov., sp. nov., a thermophilic, anaerobic heterotroph isolated from Troll B oil production fluid in the North Sea.
  • Dahle, Håkon; Garshol, Frøydis; Madsen, Marit Steine; Birkeland, Nils-Kåre. 2007. Microbial community structure analysis of produced water from a high-temperature oil-field in the North-Sea.
  • Dahle, Håkon; Garshol, Frøydis; Madsen, Marit Steine; Birkeland, Nils-Kåre. 2007. Microbial community structure analysis of produced water from a high-temperature North-Sea oil-field.
  • Dahle, Håkon; Madsen, Marit Steine; Garshol, Frøydis; Birkeland, Nils-Kåre. 2005. Molecular and Culture-Based Analysis of Bacteria and Archaea from a North Sea Oil-Reservoir.
  • Birkeland, Nils-Kåre; Dahle, Håkon; Madsen, Marit. 2005. Molecular and Culture-Based Analyses of Bacteria and Archaea from a North Sea Oil-Reservoir.
  • Dahle, Håkon; Birkeland, Nils-Kåre. 2004. Enrichment and isolation of thermophilic organisms capable of fermenting organic polymers.
  • Dahle, Håkon; Birkeland, Nils-Kåre. 2003. Bioprospecting of thermophilic hydrogen-producing microorganisms.
  • Garshol, Frøydis; Dahle, Håkon; Madsen, Marit; Lien, Torleiv; Birkeland, Nils-Kåre. 2003. Analysis of microbial communities associated with deep North Sea oil-wells using culture-dependent and culture-independent strategies.
  • Garshol, Frøydis; Dahle, Håkon; Madsen, Marit; Lien, Torleiv; Birkeland, Nils-Kåre. 2003. Analysis of microbial communities associated with deep North Sea oil-wells using culture-dependent and culture-independent strategies.
  • Birkeland, Nils-Kåre; Garshol, Frøydis; Dahle, Håkon; Madsen, Marit; Lien, Torleiv. 2002. Novel bacterial lineages dominating in oil-well formation water.
  • Dahle, Håkon; Lien, Torleiv; Madsen, Marit; Birkeland, Nils-Kåre; Bjørgo, Ole Christian. 2000. Characterisation of a new bacterial strain from the order Thermotogales, isolated from an oil-producing well in the North Sea.
  • Dahle, Håkon; Lien, Torleiv; Madsen, Marit Steine; Birkeland, Nils-Kåre; Bjørgo, Ole Christian. 2000. Characterisation of a new bacterial strain from the order Thermotogales, isolated from an oil-producing well in the North Sea.
  • Bjørgo, Ole Christian; Dahle, Håkon; Lien, Torleiv; Madsen, Marit Steine; Birkeland, Nils-Kåre. 1999. Isolation and characterization of two <I>Petrotoga</I>-like isolates from a North Sea oil-producing well.
Vitenskapelig oversiktsartikkel/review
  • Daae, Frida Lise; Økland, Ingeborg Elisabet; Dahle, Håkon; Jørgensen, Steffen Leth; Thorseth, Ingunn Hindenes; Pedersen, Rolf B. 2013. Microbial life associated with low-temperature alteration of ultramafic rocks in the Leka ophiolite complex. 318-339.
Fagartikkel
  • Drønen, Karine; Roalkvam, Irene; Nilsen, Hanne Katrine; Olsen, Anne Berit; Dahle, Håkon; Wergeland, Heidrun Inger. 2018. Biofilterprosesser i endring over tid. Nf xpert : en spesialutgave av Norsk fiskeoppdrett. 46-48.

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