3 Works

Biologic agents mediating matter-flow inside the porous igneous oceanic crust, Vesteris Seamount, Greenland Sea

Hinrich Schmid-Beurmann, Magnus Ivarsson, Wolfgang Bach, Wolf-Achim Kahl & Jörn Peckmann
Microorganisms within the lithosphere are biologic agents settling in niches inside the terrestrial and oceanic crust, populating the extreme environments of the deep biosphere. The fossil record of the permeable igneous oceanic crust, constructed out of primitive extrusive rock, opens a window into Earth’s early evolution and serves as an analogue for life in extraterrestrial worlds. In 2019, samples of highly porous basanites of Vesteris Seamount in the Greenland Sea were retrieved during a cruise...

The impact of variable Fe concentrations on Fe-binding ligands, dissolved organics and microbial communities in hydrothermal plumes – an experimental study

Christian Tobias Hansen, Charlotte Kleint , Stefanie Böhnke , Lukas Klose , Nicole Adam , Katharina Sass, Mirjam Perner , Thorsten Dittmar & Andrea Koschinsky
Iron (Fe) plays an important role in aquatic environments as an essential, often biolimiting micronutrient but at very high concentrations can potentially be toxic. Consequently, microbes have evolved capabilities to influence Fe bioavailability through production of organic molecules, so called ligands, which can enhance iron bioavailability or be used for detoxification mechanisms. Hydrothermal vents represent a major source of Fe to the oceans and host specialized microbes that are likely capable of influencing Fe speciation...

What factors control the development of moats and their associated contourite drifts?

Henriette Wilckens , Elda Miramontes , Tilmann Schwenk , Thomas Lüdmann , Christian Betzler , Javier Hernandez-Molina , Volkhard Spieß & Antonio Cattaneo
The interaction of sedimentary systems with oceanographic processes in deep-water environments is still not well understood, despite its importance for improving paleoreconstructions and for understanding source-to-sink sediment transport. The aim of this study is to improve our understanding of sediment deposits formed by the action of bottom currents (contourites), and specifically elongated depressions that are called ‘moats’. Moats are common incisions oriented alongslope formed by the main core of the current and are usually associated...

Registration Year

  • 2022
    3

Resource Types

  • Text
    3

Affiliations

  • Universität Hamburg, Hamburg, Germany
    2
  • Universität Bremen, Bremen, Germany
    2
  • //ror.org/00f7hpc57:affiliation affiliationIdentifier="https://ror.org/04ers2y35" affiliationIdentifierScheme="ROR" schemeURI="https://ror.org">Universität Bremen, Bremen, Germany
    1
  • //ror.org/04g2vpn86:Royal Holloway University of London, Egham, Surrey, UK
    1
  • Universität Hamburg
    1
  • GEOMAR Helmholtz Centre for Ocean Research Kiel
    1
  • Jacobs University
    1
  • Carl von Ossietzky University of Oldenburg
    1
  • IFREMER, Plouzané,France
    1
  • University of Bremen
    1