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Håkon Dahle's picture

Håkon Dahle

Associate Professor, Group Leader at Computatonal Biological Unit; WP leader at K.G. Jebsen Centre for Deep Sea Research
  • E-mailHakon.Dahle@uib.no
  • Phone+47 55 58 38 61+47 911 12 246
  • Visitor Address
    Thormøhlensgt. 53 A/B
  • Postal Address
    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. 

I am a Group Leader at the Computational Biological Unit (CBU), and lead the work-package 'Energy and Life' at the K.G. Jebsen Centre for Deep Sea Research.

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 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.

 

 

Public outreach

Polhavets hemmeligheter (kronikk i Nordlys)

 

Academic article
  • 2020. Tailoring hydrothermal vent biodiversity towards improved biodiscovery using a novel in-situ enrichment strategy. Frontiers in Microbiology.
  • 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. Water masses and depth structure prokaryotic and T4-like viral communities around hydrothermal systems of the Nordic Seas. Frontiers in Microbiology. 1-17.
  • 2018. Energy landscapes in hydrothermal chimneys shape distribution of primary producers. Frontiers in Microbiology.
  • 2018. Distribution patterns of iron-oxidizing Zeta- and Beta-Proteobacteria from different environmental settings of the Jan Mayen vent fields. Frontiers in Microbiology.
  • 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.
  • 2016. The Microbiome and Occurrence of Methanotrophy in Carnivorous Sponges. Frontiers in Microbiology. 1-14.
  • 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.
  • 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.
  • 2015. Physiological and genomic characterization of Arcobacter anaerophilus IR-1 reveals new metabolic features in Epsilonproteobacteria. Frontiers in Microbiology.
  • 2015. Functional interactions among filamentous Epsilonproteobacteria and Bacteroidetes in a deep-sea hydrothermal vent biofilm. Environmental Microbiology. 4063-4077.
  • 2015. Evidence for extensive gene flow and Thermotoga subpopulations in subsurface and marine environments. The ISME Journal. 1532-1542.
  • 2015. Energy landscapes shape microbial communities in hydrothermal systems on the Arctic Mid-Ocean Ridge. The ISME Journal. 1593-1606.
  • 2013. The versatile in situ gene expression of an Epsilonproteobacteria-dominated biofilm from a hydrothermal chimney. Environmental Microbiology Reports. 282-290.
  • 2012. Low temperature alteration of serpentinized ultramafic rock and implications for microbial life. Chemical Geology. 75-87.
  • 2012. Fine-scale community structure analysis of ANME in Nyegga sediments with high and low methane flux. Frontiers in Microbiology. 1-13.
  • 2011. New insight into stratification of anaerobic methanotrophs in cold seep sediments. FEMS Microbiology Ecology. 233-243.
  • 2011. Evolution of temperature optimum in Thermotogaceae and the prediction of trait values of uncultured organisms. Extremophiles. 509-516.
  • 2009. The Genome of Thermosipho africanus TCF52B: Lateral Genetic Connections to the Firmicutes and Archaea. Journal of Bacteriology. 1974-1978.
  • 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.
  • 2008. Rock support design for special lighting caverns in high in-situ stress rock mass. Chinese Journal of Rock Mechanics and Engineering.
  • 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.
  • 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.
Lecture
  • 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.
Academic lecture
  • 2019. Biogeochemical processes in submarine mine tailings and the impact on benthic fauna.
  • 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.
  • 2016. Weathering of sulphides at the Arctic Mid-Ocean Ridge.
  • 2016. Mobilization of heavy metals in submarine mine tailings.
  • 2016. Local environmental controls on microbial Fe(II)-oxidation in seafloor hydrothermal deposits.
  • 2014. Use of metatranscriptomics, amplicon pyrosequencing and thermodynamics to assess how microbial communities are shaped by energy availability.
  • 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.
  • 2014. Energy landscapes shape microbial communities and the distribution of biosignatures in hydrothermal systems on the Arctic Mid-Ocean Ridge.
  • 2013. Thermodynamic constraints on the microbial ecology and biogeochemical cycling in deep-sea hydrothermal systems.
  • 2013. Formation of barite chimneys at low-temperature hydrothermal venting: evidence for complex geobio-interactions.
  • 2012. Metagenomics of arctic hydrothermal vent biofilms.
  • 2011. Microbial processes and biomineralisation associated with low-temperature venting and formation of barite chimneys at Loki's Castle hydrothermal field.
  • 2010. A variety of microbial mats cover the chimney walls of the Loki's Castle hydrothermal field.
  • 2003. Treasures in the deep biosphere of North Sea oil-wells.
  • 2000. Thermosipho strain TBA5, a new thermophilic anaerobic bacterium, isolated from a North Sea oil field.
  • 2000. Thermosipho strain TBA5, a new thermophilic anaerobic bacterium, isolated from a North Sea oil field.
Thesis at a second degree level
  • 2001. Karakterisering av en bakteriestamme fra ordenen Thermotogales, isolert fra et oljereservoar i Nordsjøen.
Doctoral dissertation
  • 2018. Iron-Oxidizing Microorganisms at the Jan Mayen Hydrothermal Vent Fields.
  • 2007. Microbiological analyses of produced water from a high-temperature oil formation in the North-Sea.
Poster
  • 2019. Microbial activation of biofilters in marine RAS -based on lab experiments and field observations.
  • 2019. Identification of key-players in anaerobic alkane oxidation in the diffuse venting Barite Field at the Loki´s castle.
  • 2019. Effect of UV water treatment on microbial community structure Studied in two different land based aquaculture systems.
  • 2015. Isolation, characterization and genome analysis of a nitrate reducing Arcobacter sp. isolated from injection water.
  • 2014. Microbial community changes within a chimney wall at the basalt-hosted Jan Mayen vent field (JMVF):Modeled predictions vs. Pyrosequencing data.
  • 2014. Exploring the biotechnological potential of microbial communities in the Jan Mayen Vent Fields by use of in situ incubation chambers.
  • 2014. Comparison of microbial communities within iron-containing mats at different geochemical settings in the Jan Mayen vent field.
  • 2013. Stability of heavy metals in submarine tailings: A geochemical and microbiological study.
  • 2013. Exploring the biotechnological potential of microbial communities in the Jan Mayen Vent Fields by use of in situ incubation chambers.
  • 2012. Microbial mediated formation of low-temperature hydrothermal barite chimneys.
  • 2012. Metatranscriptomic and phylogenetic analysis of bacterial mats growing on chimney surfaces at the Loki´s Castle hydrothermal field.
  • 2012. Low temperature alteration of ultramafic rock sustaining associated microbial communities.
  • 2012. Combined spectroscopic, microscopic and DNA analyses of hydrothermal siliceous Fe despots.
  • 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.
  • 2008. Kosmotoga olearia gen. nov., sp. nov., a thermophilic, anaerobic heterotroph isolated from Troll B oil production fluid in the North Sea.
  • 2007. Microbial community structure analysis of produced water from a high-temperature oil-field in the North-Sea.
  • 2007. Microbial community structure analysis of produced water from a high-temperature North-Sea oil-field.
  • 2005. Molecular and Culture-Based Analysis of Bacteria and Archaea from a North Sea Oil-Reservoir.
  • 2005. Molecular and Culture-Based Analyses of Bacteria and Archaea from a North Sea Oil-Reservoir.
  • 2004. Enrichment and isolation of thermophilic organisms capable of fermenting organic polymers.
  • 2003. Bioprospecting of thermophilic hydrogen-producing microorganisms.
  • 2003. Analysis of microbial communities associated with deep North Sea oil-wells using culture-dependent and culture-independent strategies.
  • 2003. Analysis of microbial communities associated with deep North Sea oil-wells using culture-dependent and culture-independent strategies.
  • 2002. Novel bacterial lineages dominating in oil-well formation water.
  • 2000. Characterisation of a new bacterial strain from the order Thermotogales, isolated from an oil-producing well in the North Sea.
  • 2000. Characterisation of a new bacterial strain from the order Thermotogales, isolated from an oil-producing well in the North Sea.
  • 1999. Isolation and characterization of two <I>Petrotoga</I>-like isolates from a North Sea oil-producing well.
Academic literature review
  • 2013. Microbial life associated with low-temperature alteration of ultramafic rocks in the Leka ophiolite complex. 318-339.
Article in business/trade/industry journal
  • 2018. Biofilterprosesser i endring over tid. Nf xpert : en spesialutgave av Norsk fiskeoppdrett. 46-48.

More information in national current research information system (CRIStin)

Current projects:

VIRVAR - Uncovering key players for regulation of phytoplankton function and structure: lessons to be learned from algal virus-haptophyte coexistence (NFR)

MONITOR - Adapting monitoring tools for bacterial load detection in closed marine fish farms: for improved fish health and reduced mortalities (NFR)

Research groups