- E-posthakon.dahle@uib.no
- Telefon+47 55 58 38 61
- BesøksadresseThormøhlens gate 53 A/B5006 Bergen
- PostadressePostboks 78035020 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
- (2024). Biofilter and degasser performance at different alkalinity levels in a brackish water pilot scale recirculating aquaculture system (RAS) for post-smolt Atlantic salmon. Aquacultural Engineering. 11 sider.
- (2023). Putative novel hydrogen- and iron-oxidizing sheath-producing Zetaproteobacteria thrive at the Fåvne deep-sea hydrothermal vent field. mSystems.
- (2023). Molecular evidence of parallel evolution in a cyanophage. PLOS ONE. 1-15.
- (2022). Presence and habitats of bacterial fish pathogen relatives in a marine salmon post-smolt RAS. Aquaculture Reports. 1-13.
- (2022). Phylogenetic and functional diverse ANME-1 thrive in Arctic hydrothermal vents. FEMS Microbiology Ecology. 11 sider.
- (2022). Microbiome dataset from a marine recirculating aquaculture system (RAS) for salmon post-smolt production in Norway. Data in Brief.
- (2022). Hot Vents Beneath an Icy Ocean: The Aurora Vent Field, Gakkel Ridge, Revealed. Oceanography. 12 sider.
- (2021). On how the power supply shapes microbial survival. Mathematical Biosciences.
- (2021). Microbial colonization and community stability in a marine post-smolt RAS inoculated with a commercial starter culture. Aquaculture Reports. 1-13.
- (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.
- (2021). Adaptive evolution of viruses infecting marine microalgae (haptophytes), from acute infections to stable coexistence. Biological Reviews. 179-194.
- (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.
- (2020). Tailoring hydrothermal vent biodiversity towards improved biodiscovery using a novel in-situ enrichment strategy. Frontiers in Microbiology.
- (2020). Indigenous ammonia-oxidizing archaea in oxic subseafloor oceanic crust. mSystems.
- (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). 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). Microbial analysis of Zetaproteobacteria and co-colonizers of iron mats in the Troll Wall Vent Field, Arctic Mid-Ocean Ridge. PLOS ONE.
- (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.
Faglig foredrag
- (2021). Vital and all over the place – A neglected group of frenemy viruses.
- (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.
Vitenskapelig foredrag
- (2023). PERSISTENT VIRUS PRODUCTION BY PHYTOPLANKTON.
- (2022). Iron oxidizing bacteria producing sheath structures in mats on high temperature chimneys at Fåvne hydrothermal vent field.
- (2022). Genomes of two giant viruses and their capacity in the infection cycles.
- (2019). Friends or foes, strategies for stable co-existance in algel viruses infecting haptophytes.
- (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.
Hovedfagsoppgave
- (2001). Karakterisering av en bakteriestamme fra ordenen Thermotogales, isolert fra et oljereservoar i Nordsjøen.
Doktorgradsavhandling
- (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
- (2022). Sheath-forming Zetaproteobacteria abundant in black smoker chimney mats at the newly discovered Fåvne hydrothermal vent field.
- (2022). Sheath-forming Zetaproteobacteria abundant in black smoker chimney mats at the newly discovered Fåvne hydrothermal vent field.
- (2022). Interpretation of microbial food webs from metagenomic data in deep-sea hydrothermal vents across the Arctic Mid-Ocean Ridge.
- (2022). Genomes of two giant viruses and their capacity in the infection cycles.
- (2022). Friend or enemy: The story of a frenemy relationship between a virus and its host.
- (2021). Iron Oxidizers and Sheath-forming Zetaproteobacteria in Biofilms of the Newly Discovered Fåvne Hydrothermal Vent Field.
- (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.
Vitenskapelig oversiktsartikkel/review
- (2021). Going to extremes - A metagenomic journey into the dark matter of life. FEMS Microbiology Letters. 16 sider.
- (2013). Microbial life associated with low-temperature alteration of ultramafic rocks in the Leka ophiolite complex. Geobiology. 318-339.
Fagartikkel
- (2023). Er lav partikkelbelastning i RAS fordelaktig? Norsk Fiskeoppdrett.
- (2018). Biofilterprosesser i endring over tid. Nf xpert : en spesialutgave av Norsk fiskeoppdrett. 46-48.
