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Håkon Dahles bilde

Håkon Dahle

Førsteamanuensis
  • E-postHakon.Dahle@uib.no
  • Telefon+47 55 58 38 61+47 911 12 246
  • Besøksadresse
    Thormøhlens gate 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
  • Vis forfatter(e) 2021. Microbial colonization and community stability in a marine post-smolt RAS inoculated with a commercial starter culture. Aquaculture Reports. 1-13.
  • Vis forfatter(e) 2021. Exploring codon adjustment strategies towards Escherichia coli-based production of viral proteins encoded by HTH1, a novel prophage of the marine bacterium Hypnocyclicus thermotrophus. Viruses.
  • Vis forfatter(e) 2021. A persistent giant algal virus, with a unique morphology, encodes an unprecedented number of genes involved in energy metabolism. Journal of Virology. 1-58.
  • Vis forfatter(e) 2020. Tailoring hydrothermal vent biodiversity towards improved biodiscovery using a novel in-situ enrichment strategy. Frontiers in Microbiology.
  • Vis forfatter(e) 2020. Indigenous ammonia-oxidizing archaea in oxic subseafloor oceanic crust. mSystems.
  • Vis forfatter(e) 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.
  • Vis forfatter(e) 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.
  • Vis forfatter(e) 2019. Microbial Communities in a Flow-Through Fish Farm for Lumpfish (Cyclopterus lumpus L.) During Healthy Rearing Conditions. Frontiers in Microbiology.
  • Vis forfatter(e) 2019. Comparison of active biofilm carriers and commercially available inoculum for activation of biofilters in marine recirculating aquaculture systems (RAS). Aquaculture.
  • Vis forfatter(e) 2018. Water masses and depth structure prokaryotic and T4-like viral communities around hydrothermal systems of the Nordic Seas. Frontiers in Microbiology. 1-17.
  • Vis forfatter(e) 2018. Energy landscapes in hydrothermal chimneys shape distribution of primary producers. Frontiers in Microbiology.
  • Vis forfatter(e) 2018. Distribution patterns of iron-oxidizing Zeta- and Beta-Proteobacteria from different environmental settings of the Jan Mayen vent fields. Frontiers in Microbiology.
  • Vis forfatter(e) 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.
  • Vis forfatter(e) 2016. The Microbiome and Occurrence of Methanotrophy in Carnivorous Sponges. Frontiers in Microbiology. 1-14.
  • Vis forfatter(e) 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.
  • Vis forfatter(e) 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.
  • Vis forfatter(e) 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.
  • Vis forfatter(e) 2015. Physiological and genomic characterization of Arcobacter anaerophilus IR-1 reveals new metabolic features in Epsilonproteobacteria. Frontiers in Microbiology.
  • Vis forfatter(e) 2015. Functional interactions among filamentous Epsilonproteobacteria and Bacteroidetes in a deep-sea hydrothermal vent biofilm. Environmental Microbiology. 4063-4077.
  • Vis forfatter(e) 2015. Evidence for extensive gene flow and Thermotoga subpopulations in subsurface and marine environments. The ISME Journal. 1532-1542.
  • Vis forfatter(e) 2015. Energy landscapes shape microbial communities in hydrothermal systems on the Arctic Mid-Ocean Ridge. The ISME Journal. 1593-1606.
  • Vis forfatter(e) 2013. The versatile in situ gene expression of an Epsilonproteobacteria-dominated biofilm from a hydrothermal chimney. Environmental Microbiology Reports. 282-290.
  • Vis forfatter(e) 2012. Low temperature alteration of serpentinized ultramafic rock and implications for microbial life. Chemical Geology. 75-87.
  • Vis forfatter(e) 2012. Fine-scale community structure analysis of ANME in Nyegga sediments with high and low methane flux. Frontiers in Microbiology. 1-13.
  • Vis forfatter(e) 2011. New insight into stratification of anaerobic methanotrophs in cold seep sediments. FEMS Microbiology Ecology. 233-243.
  • Vis forfatter(e) 2011. Evolution of temperature optimum in Thermotogaceae and the prediction of trait values of uncultured organisms. Extremophiles. 509-516.
  • Vis forfatter(e) 2009. The Genome of Thermosipho africanus TCF52B: Lateral Genetic Connections to the Firmicutes and Archaea. Journal of Bacteriology. 1974-1978.
  • Vis forfatter(e) 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.
  • Vis forfatter(e) 2008. Rock support design for special lighting caverns in high in-situ stress rock mass. Chinese Journal of Rock Mechanics and Engineering.
  • Vis forfatter(e) 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.
  • Vis forfatter(e) 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
  • Vis forfatter(e) 2014. Towards a framework for analyses of how energy landscapes shape microbial communities in deep-sea hydrothermal systems.
  • Vis forfatter(e) 2014. Metagenomic study of a filamentous microbial mat from the Loki´s Castle Vent Field.
Vitenskapelig foredrag
  • Vis forfatter(e) 2019. Friends or foes, strategies for stable co-existance in algel viruses infecting haptophytes.
  • Vis forfatter(e) 2019. Biogeochemical processes in submarine mine tailings and the impact on benthic fauna.
  • Vis forfatter(e) 2018. Monitoring the main changes in the bacterial community in a RAS biofilter during the first year of operation.
  • Vis forfatter(e) 2018. Mikrobiell overvåkning av rognkjeksanlegg ved omfattende prøvetaking og detaljert analyseverktøy.
  • Vis forfatter(e) 2018. Mikrobiell overvåkning av rognkjeksanlegg -prøvetaking og analyseverktøy.
  • Vis forfatter(e) 2016. Weathering of sulphides at the Arctic Mid-Ocean Ridge.
  • Vis forfatter(e) 2016. Mobilization of heavy metals in submarine mine tailings.
  • Vis forfatter(e) 2016. Local environmental controls on microbial Fe(II)-oxidation in seafloor hydrothermal deposits.
  • Vis forfatter(e) 2014. Use of metatranscriptomics, amplicon pyrosequencing and thermodynamics to assess how microbial communities are shaped by energy availability.
  • Vis forfatter(e) 2014. Microbial communities associated with low-temperature venting barite chimneys in the Loki´s Castle black smoker field.
  • Vis forfatter(e) 2014. Microbial communities associated with low-temparture venting barite chimneys in the Loki´s Castle black smoker field.
  • Vis forfatter(e) 2014. Energy landscapes shape microbial communities and the distribution of biosignatures in hydrothermal systems on the Arctic Mid-Ocean Ridge.
  • Vis forfatter(e) 2013. Thermodynamic constraints on the microbial ecology and biogeochemical cycling in deep-sea hydrothermal systems.
  • Vis forfatter(e) 2013. Formation of barite chimneys at low-temperature hydrothermal venting: evidence for complex geobio-interactions.
  • Vis forfatter(e) 2012. Metagenomics of arctic hydrothermal vent biofilms.
  • Vis forfatter(e) 2011. Microbial processes and biomineralisation associated with low-temperature venting and formation of barite chimneys at Loki's Castle hydrothermal field.
  • Vis forfatter(e) 2010. A variety of microbial mats cover the chimney walls of the Loki's Castle hydrothermal field.
  • Vis forfatter(e) 2003. Treasures in the deep biosphere of North Sea oil-wells.
  • Vis forfatter(e) 2000. Thermosipho strain TBA5, a new thermophilic anaerobic bacterium, isolated from a North Sea oil field.
  • Vis forfatter(e) 2000. Thermosipho strain TBA5, a new thermophilic anaerobic bacterium, isolated from a North Sea oil field.
Hovedfagsoppgave
  • Vis forfatter(e) 2001. Karakterisering av en bakteriestamme fra ordenen Thermotogales, isolert fra et oljereservoar i Nordsjøen.
Doktorgradsavhandling
  • Vis forfatter(e) 2018. Iron-Oxidizing Microorganisms at the Jan Mayen Hydrothermal Vent Fields.
  • Vis forfatter(e) 2007. Microbiological analyses of produced water from a high-temperature oil formation in the North-Sea.
Poster
  • Vis forfatter(e) 2019. Microbial activation of biofilters in marine RAS -based on lab experiments and field observations.
  • Vis forfatter(e) 2019. Identification of key-players in anaerobic alkane oxidation in the diffuse venting Barite Field at the Loki´s castle.
  • Vis forfatter(e) 2019. Effect of UV water treatment on microbial community structure Studied in two different land based aquaculture systems.
  • Vis forfatter(e) 2015. Isolation, characterization and genome analysis of a nitrate reducing Arcobacter sp. isolated from injection water.
  • Vis forfatter(e) 2014. Microbial community changes within a chimney wall at the basalt-hosted Jan Mayen vent field (JMVF):Modeled predictions vs. Pyrosequencing data.
  • Vis forfatter(e) 2014. Exploring the biotechnological potential of microbial communities in the Jan Mayen Vent Fields by use of in situ incubation chambers.
  • Vis forfatter(e) 2014. Comparison of microbial communities within iron-containing mats at different geochemical settings in the Jan Mayen vent field.
  • Vis forfatter(e) 2013. Stability of heavy metals in submarine tailings: A geochemical and microbiological study.
  • Vis forfatter(e) 2013. Exploring the biotechnological potential of microbial communities in the Jan Mayen Vent Fields by use of in situ incubation chambers.
  • Vis forfatter(e) 2012. Microbial mediated formation of low-temperature hydrothermal barite chimneys.
  • Vis forfatter(e) 2012. Metatranscriptomic and phylogenetic analysis of bacterial mats growing on chimney surfaces at the Loki´s Castle hydrothermal field.
  • Vis forfatter(e) 2012. Low temperature alteration of ultramafic rock sustaining associated microbial communities.
  • Vis forfatter(e) 2012. Combined spectroscopic, microscopic and DNA analyses of hydrothermal siliceous Fe despots.
  • Vis forfatter(e) 2010. Microbial community structure of biomats and chimney walls of the Loki’s Castle hydrothermal field at 73°N.
  • Vis forfatter(e) 2010. Detection of methanotrophic archaea in a barite chimney at Loki’s Castle, the Arctic Mid-Ocean Ridge.
  • Vis forfatter(e) 2008. Kosmotoga olearia gen. nov., sp. nov., a thermophilic, anaerobic heterotroph isolated from Troll B oil production fluid in the North Sea.
  • Vis forfatter(e) 2007. Microbial community structure analysis of produced water from a high-temperature oil-field in the North-Sea.
  • Vis forfatter(e) 2007. Microbial community structure analysis of produced water from a high-temperature North-Sea oil-field.
  • Vis forfatter(e) 2005. Molecular and Culture-Based Analysis of Bacteria and Archaea from a North Sea Oil-Reservoir.
  • Vis forfatter(e) 2005. Molecular and Culture-Based Analyses of Bacteria and Archaea from a North Sea Oil-Reservoir.
  • Vis forfatter(e) 2004. Enrichment and isolation of thermophilic organisms capable of fermenting organic polymers.
  • Vis forfatter(e) 2003. Bioprospecting of thermophilic hydrogen-producing microorganisms.
  • Vis forfatter(e) 2003. Analysis of microbial communities associated with deep North Sea oil-wells using culture-dependent and culture-independent strategies.
  • Vis forfatter(e) 2003. Analysis of microbial communities associated with deep North Sea oil-wells using culture-dependent and culture-independent strategies.
  • Vis forfatter(e) 2002. Novel bacterial lineages dominating in oil-well formation water.
  • Vis forfatter(e) 2000. Characterisation of a new bacterial strain from the order Thermotogales, isolated from an oil-producing well in the North Sea.
  • Vis forfatter(e) 2000. Characterisation of a new bacterial strain from the order Thermotogales, isolated from an oil-producing well in the North Sea.
  • Vis forfatter(e) 1999. Isolation and characterization of two <I>Petrotoga</I>-like isolates from a North Sea oil-producing well.
Vitenskapelig oversiktsartikkel/review
  • Vis forfatter(e) 2021. Going to extremes - A metagenomic journey into the dark matter of life. FEMS Microbiology Letters. 1-16.
  • Vis forfatter(e) 2013. Microbial life associated with low-temperature alteration of ultramafic rocks in the Leka ophiolite complex. Geobiology. 318-339.
Fagartikkel
  • Vis forfatter(e) 2018. Biofilterprosesser i endring over tid. Nf xpert : en spesialutgave av Norsk fiskeoppdrett. 46-48.

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