Eoghan P. Reeves

University of Bergen

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Wolfgang Bach

University of Bremen

Jeffrey S. Seewald

Woods Hole Oceanographic Institution

Ida Helene Steen

University of Bergen

Sean P. Sylva

Woods Hole Oceanographic Institution

J. Seewald

Woods Hole Oceanographic Institution

TØ

Thomas Øfstegaard Viflot

University of Bergen

Runar Stokke

University of Bergen

Chanakan Boonnawa

University of Bergen

Jill M. McDermott

Lehigh University

John W. Jamieson

Memorial University of Newfoundland

Cooperative Institutions

University of Bergen

Woods Hole Oceanographic Institution

University of Bremen

Massachusetts Institute of Technology

UiT The Arctic University of Norway

Max Planck Institute for Marine Microbiology

Universidade de Vigo

ETH Zurich

Universidade da Coruña

Universidade de Santiago de Compostela

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Rare earth element abundances in hydrothermal fluids from the Manus Basin, Papua New Guinea: Indicators of sub-seafloor hydrothermal processes in back-arc basins

Geochimica et Cosmochimica Acta (2010)

Paul R. Craddock Wolfgang Bach Jeffrey S. Seewald Olivier Rouxel Eoghan P. Reeves

Seafloor Spreading

Rare-earth element

Anhydrite

Back-arc basin

Fluorite

10.1016/j.gca.2010.07.003

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Citations (153)

Supplementary Material: Novel hydrogen- and iron-oxidizing sheath-producing Zetaproteobacteria thrive at the Fåvne deep-sea hydrothermal vent field

Zenodo (CERN European Organization for Nuclear Research) (2023)

Petra Hribovšek Emily Olesin Denny Håkon Dahle Achim Mall Thomas Øfstegaard Viflot

This repository contains four Supplementary Material files related to the manuscript "Novel hydrogen- and iron-oxidizing sheath-producing Zetaproteobacteria thrive at the Fåvne deep-sea hydrothermal vent field". 1) SupplementaryMaterial1.pdf Supplementary Material 1. Supplementary Data and Figures. 2) SupplementaryMaterial2.xlsx Supplementary Material 2. Supplementary Tables. Supplementary Table S1A. Sequencing statistics for MinION Nanopore sequencing.
Supplementary Table S1B. Sequencing statistics for Illumina NovaSeq sequencing.
Supplementary Table S2. Assembly statistics for comparison, based on MetaQUAST.
Supplementary Table S3. MAGs present in the black smoker iron microbial mat.
Supplementary Table S4. Zetaproteobacteria MAGs used in this study.
Supplementary Table S5. List of single-copy marker genes used for concatenated phylogeny.
Supplementary Table S6. Selected genes for metabolism annotation.
Supplementary Table S7. Heavy metal resistance genes identified using BacMet database.
Supplementary Table S8A. Hydrogenase Hya included in the hya phylogenetic tree.
Supplementary Table S8B. Cyc2 included in the cyc2 phylogenetic tree.
Supplementary Table S9. Viral populations in Fåvne black smoker iron microbial mat.
Supplementary Table S10. Results of proteomics analysis.
Supplementary Table S11. Coverage of Zetaproteobacteria MAGs in Fåvne samples.
Supplementary Table S12. Predicted gene expression based on codon usage. 3) SupplementaryMaterial3.mp4 Supplementary Material 3. Sampling video of black smoker iron microbial mats at Fåvne hydrothermal vent (North Tower vent site). 4) SupplementaryMaterial4_TableS1.pdf Supplementary Material 4. Sampling locations.

Oxidizing agent

10.5281/zenodo.8058699

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Geochemistry of hot-springs at the SuSu Knolls hydrothermal field, Eastern Manus Basin: Advanced argillic alteration and vent fluid acidity

Geochimica et Cosmochimica Acta (2019)

Jeffrey S. Seewald Eoghan P. Reeves Wolfgang Bach Peter J. Saccocia Paul R. Craddock

Argillic alteration

Magmatic water

Anhydrite

Felsic

10.1016/j.gca.2019.03.034

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Citations (33)

The abiotic disproportionation of sulfur dioxide (SO2) produces sulfate with an oxygen isotope signature close to the isotope composition of seawater sulfate

EGU General Assembly Conference Abstracts (2013)

Inigo A. Müller Benjamin Brunner Thomas Max Christian Breuer Eoghan P. Reeves

Isotopic signature

Sulfur Cycle

Source

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Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean

Muhammed Fatih Sert Helge Niemann Eoghan P. Reeves Mats A. Granskog K. P. Hand

Abstract. Hydrothermal vents modify and displace subsurface dissolved organic matter (DOM) into the ocean. Once in the ocean, this DOM is transported together with elements, particles, dissolved gases, and biomass along with the neutrally buoyant plume layer. Considering the number and extent of actively venting hydrothermal sites in the oceans, their contribution to the oceanic DOM pool may be substantial. Here, we investigate the dynamics of DOM in relation to hydrothermal venting and related processes at the as-yet unexplored Aurora hydrothermal vent field within the ultraslow spreading Gakkel Ridge in the Arctic Ocean at 82.9° N. We examined the vertical distribution of DOM composition from sea ice to deep waters at six hydrocast stations distal to the active vent and its neutrally buoyant plume layer. In comparison to background seawater, we found that the DOM in waters directly affected by the hydrothermal plume was composed of lower numbers of molecular formulas and 5–10 % less abundant compositions associated with the molecular categories related to lipid and protein-like compounds. Samples that were not directly affected by the plume, on the other hand, were chemically more diverse and had a higher percentage of chemical formulas associated with the carbohydrate-like category. We suggest, therefore, that hydrothermal processes at Aurora may influence the DOM distribution in the bathypelagic ocean by spreading more thermally and/or chemically induced compositions, while DOM compositions in epipelagic and mesopelagic layers are mainly governed by the microbial carbon pump dynamics, and sea ice surface water interactions.

Mesopelagic zone

10.5194/bg-2021-350

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Citations (3)

Production and Destruction of Novel Organic Species during simulated Hydrothermal Alteration of Seafloor Sediment

Goldschmidt Abstracts (2023)

Thomas Øfstegaard Viflot Samuel Pereira Chanakan Boonnawa Thilde Voje Steffen L. Jørgensen

Seafloor Spreading

10.7185/gold2023.19915

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Hydrothermal activity fuels microbial sulfate reduction in deep and distal marine settings along the Arctic Mid Ocean Ridges

Frontiers in Marine Science (2024)

Desiree L. Roerdink Francesca Vulcano Jan-Kristoffer Landro Karen E. Moltubakk Hannah R. Babel

Microbial sulfate reduction is generally limited in the deep sea compared to shallower marine environments, but cold seeps and hydrothermal systems are considered an exception. Here, we report sulfate reduction rates and geochemical data from marine sediments and hydrothermal vent fields along the Arctic Mid Ocean Ridges (AMOR), to assess the significance of basalt-hosted hydrothermal activity on sulfate reduction in a distal deep marine setting. We find that cored marine sediments do not display evidence for sulfate reduction, apart from low rates in sediments from the Knipovich Ridge. This likely reflects the overall limited availability of reactive organic matter and low sedimentation rates along the AMOR, except for areas in the vicinity of Svalbard and Bear Island. In contrast, hydrothermal samples from the Seven Sisters, Jan Mayen and Loki’s Castle vent fields all demonstrate active microbial sulfate reduction. Rates increase from a few 10s to 100s of pmol SO 4 2- cm -3 d -1 in active high-temperature hydrothermal chimneys, to 10s of nmol SO 4 2- cm -3 d -1 in low-temperature barite chimneys and up to 110 nmol cm -3 d -1 in diffuse venting hydrothermal sediments in the Barite field at Loki’s Castle. Pore fluid and sediment geochemical data suggest that these high rates are sustained by organic compounds from microbial mats and vent fauna as well as methane supplied by high-temperature hydrothermal fluids. However, significant variation was observed between replicate hydrothermal samples and observation of high rates in seemingly inactive barite chimneys suggests that other electron donors may be important as well. Sediment sulfur isotope signatures concur with measured rates in the Barite field and indicate that microbial sulfate reduction has occurred in the hydrothermal sediments since the recent geological past. Our findings indicate that basalt-hosted vent fields provide sufficient electron donors to support microbial sulfate reduction in high- and low-temperature hydrothermal areas in settings that otherwise show very low sulfate reduction rates.

Seafloor Spreading

Cold seep

Sedimentation

10.3389/fmars.2023.1320655

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Citations (1)

Supplementary Material: Putative novel hydrogen- and iron-oxidizing sheath-producing Zetaproteobacteria thrive at the Fåvne deep-sea hydrothermal vent field

Zenodo (CERN European Organization for Nuclear Research) (2023)

Petra Hribovšek Emily Olesin Denny Håkon Dahle Achim Mall Thomas Øfstegaard Viflot

This repository contains four Supplementary Material files related to the manuscript "Putative novel hydrogen- and iron-oxidizing sheath-producing Zetaproteobacteria thrive at the Fåvne deep-sea hydrothermal vent field". 1) SupplementaryMaterial1_TableS1.pdf Supplementary Material 1. Sampling locations. 2) SupplementaryMaterial2.pdf Supplementary Material 2. Supplementary Data and Figures. 3) SupplementaryMaterial3.xlsx Supplementary Material 3. Supplementary Tables. Supplementary Table S1. Viral populations in Fåvne black smoker iron microbial mat.
Supplementary Table S2. MAGs present in the black smoker iron microbial mat.
Supplementary Table S3. Coverage of Zetaproteobacteria MAGs in Fåvne samples.
Supplementary Table S4. Zetaproteobacteria MAGs used in this study.
Supplementary Table S5. Predicted gene expression based on codon usage.
Supplementary Table S6. Hydrogenase Hya included in the hya phylogenetic tree.
Supplementary Table S7. Cyc2 included in the cyc2 phylogenetic tree.
Supplementary Table S8. Results of proteomics analysis.
Supplementary Table S9. Heavy metal resistance genes identified using BacMet database.
Supplementary Table S10. Sequencing statistics for MinION Nanopore sequencing.
Supplementary Table S11. Sequencing statistics for Illumina NovaSeq sequencing.
Supplementary Table S12. Assembly statistics for comparison, based on MetaQUAST.
Supplementary Table S13. List of single-copy marker genes used for concatenated phylogeny.
Supplementary Table S14. Selected genes for metabolism annotation. 4) SupplementaryMaterial4.mp4 Supplementary Material 4. Sampling video of black smoker iron microbial mats at Fåvne hydrothermal vent (North Tower vent site).

Oxidizing agent

10.5281/zenodo.8058698

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Hot Vents Beneath an Icy Ocean: The Aurora Vent Field, Gakkel Ridge, Revealed

Oceanography (2022)

Eva Ramirez‐Llodra Claudio Argentino Maria Baker Antje Boëtius Carolina Costa

Evidence of hydrothermal venting on the ultra-slow spreading Gakkel Ridge in the Central Arctic Ocean has been available since 2001, with first visual evidence of black smokers on the Aurora Vent Field obtained in 2014. But it was not until 2021 that the first ever remotely operated vehicle (ROV) dives to hydrothermal vents under permanent ice cover in the Arctic were conducted, enabling the collection of vent fluids, rocks, microbes, and fauna. In this paper, we present the methods employed for deep-sea ROV operations under drifting ice. We also provide the first description of the Aurora Vent Field, which includes three actively venting black smokers and diffuse flow on the Aurora mound at ~3,888 m depth on the southern part of the Gakkel Ridge (82.5°N). The biological communities are dominated by a new species of cocculinid limpet, two small gastropods, and a melitid amphipod. The ongoing analyses of Aurora Vent Field samples will contribute to positioning the Gakkel Ridge hydrothermal vents in the global biogeographic puzzle of hydrothermal vents.

10.5670/oceanog.2023.103

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Citations (11)

FISH analysis on samples of the Menez Gwen hydrothermal field

Dimitri V. Meier Wolfgang Bach Peter R. Girguis Harald R. Gruber‐Vodicka Eoghan P. Reeves

10.1594/pangaea.883181

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