14 Works

Identification of the diagenetic sedimentary environment and hydrothermal fluid fluxes in Southern Ocean sediments (IODP Exp 382) using B, Si and Sr isotopes in interstitial waters

Valentin Mollé , Sonja Geilert , Bridget Kenlee , Klaus Wallmann , Osamu Seki , Ji-Hwan Hwan , Michael E Weber , Maureen Raymo , Victoria L. Peck , Trevor Williams , Florian Scholz & Expedition 382 Scientists
During IODP Expedition 382, two sites were drilled at 53.2°S at the northern edge of the Scotia Sea and three sites at 57.4°–59.4°S in the southern Scotia Sea within the Atlantic sector of the Southern Ocean. Sediments at both locations alternate between dominant terrigenous components during glacials and dominant biogenic components, carbonate at the northerly sites and opal in the southern Scotia Sea, during interglacials. Here we constrain the geochemical environment in interstitial waters using...

Checklist to Support the Helmholtz Centers in Implementing Policies on Sustainable Research Software

Reinhard Messerschmidt, Heinz Pampel, Felix Bach, Wolfgang zu Castell, Michael Denker, Ants Finke, Bernadette Fritzsch, Martin Hammitzsch, Uwe Konrad, Yvonne Leifels, Christoph Möhl, Marco Nolden, Markus Scheinert, Tobias Schlauch, Thomas Schnicke & Dirk Steglich
As the digitalization of research and teaching progresses, the number of software solutions developed at scientific institutions and used for the purpose of knowledge production is increasing. The accessibility and reuse of scientific results called for under the heading “open science” can be ensured in many fields only if, in addition to research data, program code is also made openly accessible. The present guide is addressed to decision-makers at the Helmholtz Centers who deal with...

Subduction initiation and arc evolution from a rear-arc perspective – A synthesis of results from IODP Exp. 351

Philipp A. Brandl
Subduction is a key process for the plate tectonic cycle and is responsible for the bimodal composition of the Earth’ crust. Whereas active subduction zones can be directly observed at many places, their initiation and the early evolution of the associated volcanic arc can only be studied from the geological record. One key location to study the geological processes related to subduction initiation and subsequent arc emergence and maturation is the Izu-Bonin-Mariana (IBM) subduction zone...

Decoupled dust deposition and ocean productivity in the Antarctic Zone of the Southern Ocean over the past 1.5 million years

Michael E. Weber , Ian Bailey , Sidney R. Hemming , Yasmina M. Martos , Brendan T. Reilly , Thomas A. Ronge , Stefanie Brachfeld , Trevor Williams , Maureen Raymo , Simon T. Belt , Hendrik Vogel , Victoria Peck , Linda Armbrecht , Alix Cage , Fabricio G. Cardillo , Zhiheng Du , Gerson Fauth , Christopher J. Fogwill , Marga Garcia , Marlo Garnsworthy , Anna Glüder , Michelle Guitard , Marcus Gutjahr , Iván Hernández-Almeida , Frida S. Hoem … & Xufeng Zheng
Southern Ocean paleoceanography provides key insights into how iron fertilization and oceanic productivity developed through Pleistocene ice-ages and their role in influencing the carbon cycle. We report the first high-resolution record of dust deposition and ocean productivity for the Antarctic Zone, close to the main dust source, Patagonia. Our deep-ocean records cover the last 1.5 Ma, thus doubling that from Antarctic ice-cores. We find a ≥10-fold increase in dust deposition during glacials and a ≤5-fold...

Niche partitioning between planktivorous fish in the pelagic Baltic Sea assessed by DNA metabarcoding, qPCR and microscopy: Data and Analyses

Andreas Novotny, Kinlan Jan, Jan Dierking & Monika Winder
Marine communities undergo rapid changes because of human-induced ecosystem pressures. The Baltic Sea pelagic food web has experienced several regime shifts during the past century, resulting in a system where competition between planktivorous mesopredators is assumed to be high. While the two clupeids sprat and herring reveal signs of competition, the stickleback population has increased drastically during the past decades. Here, we investigate diet overlap between the three dominating planktivorous fish in the Baltic Sea,...

Pigmentation biosynthesis influences the microbiome associated with sea urchins

Gary Wessel, Masato Kiyomoto, Adam Reitzel & Tyler Carrier
Organisms living on the seafloor are subject to encrustations by a wide variety of animal, plants, and microbes. Sea urchins, however, thwart this covering. Despite having a sophisticated immune system, there is no clear mechanism that allows sea urchins to remain clean. Here, by using CRISPR/Cas9, we test the hypothesis that pigmentation biosynthesis in sea urchin spines influences their interactions with microbes in vivo. We have three primary findings. First, the microbiome of sea urchin...

Genomic Standards Consortium (GSC) Island Sampling Day: Moorea Reef to Ridges Genomic Transect

Erin Robinson
Here we describe a project that supports the mission of the Genomic Standards Consortium (GSC) and contributes to the “Ocean Biomolecular Observations Network” (OBON) and the “Ocean Best Practice System” (OBPS - Omics Task Team), flagship programs of the UN Ocean Decade of Ocean Science for Sustainable Development. The project serves as a test case for two related infrastructure projects that aim to improve standards, policies, and best practices in sample collection: Sampling Nature (SN)...

The Helmholtz Research Field Earth & Environment DataHub and its NFDI4Earth connection

Peter Braesicke , Roland Bertelmann , Jan Bumberger & Sören Lorenz
Digitalisation and FAIR data are overarching elements in the Helmholtz Research Field Earth and Environment (RF E&E) Program-Oriented Funding Phase IV (PoF IV). Already in the transition years from PoF III to PoF IV (2019/2020) different measures were implemented to facilitate this aim. One of them is the so-called DataHub, with the aim that all Earth System (ES) data that is generated by the RF E&E will be available as FAIR data via a common...

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...

Host influenced geochemical signature in the parasitic foraminifer Hyrrokkin sarcophaga

Nicolai Schleinkofer , David Evans , Max Wisshak(3) , Janina Vanessa Büscher , Jens Fiebig , André Freiwald , Sven Härter , Horst Marschall , Silke Voigt & Jacek Raddatz
Here, we present element to Ca ratios (Mg/Ca, Sr/Ca, Na/Ca and Mn/Ca) and stable isotope data (δ18O, δ13C) of the parasitic foraminifer Hyrrokkin sarcophaga, collected from two different host organisms, Desmophyllum pertusum - a cold-water coral commonly found in cold-water coral reefs and Acesta excavata - a bivalve associated with cold-water coral reefs. Our results reveal that the geochemical signature in H. sarcophaga is influenced by the host organism. Sr/Ca ratios are 1.1 mmol mol-1...

Volcanic structures and magmatic evolution of the Vesteris Seamount, Greenland Basin

Katharina Anna Unger Moreno, Janis Thal , Wolfgang Bach , Christoph Beier & Karsten Matthias Haase
The solitary intraplate volcano Vesteris Seamount is located in the Central Greenland Basin and rises around 3000 m above the seafloor with a total eruptive volume of ~500 km3. Newly acquired high-resolution bathymetry allows through backscatter data and raster terrain analysis to distinguish several volcanic structures. The Vesteris Seamount is a northeast to southwest elongated stellar-shaped seamount with an elongated, narrow summit radially surrounded by irregular volcanic ridges, separated by volcanic debris fans. Whole rock...

DNA-metabarcoding reveals the importance of gelatinous zooplankton in the diet of Pandalus borealis, a keystone species in the Arctic

Paulina Urban, Kim Præbel, Shripathi Bhat, Jan Dierking & Owen S. Wangensteen
Information about the dietary composition of species is crucial to understand their position and role in the food web. Stomach content analysis (SCA) and stable isotope analysis (SIA) are commonly used to study marine trophic relationships. SCA can provide high taxonomic resolution but requires taxonomic expertise and frequently underestimates digestible taxa. SIA provides a time-integrated view of the dietary sources but often lacks in taxonomic resolution. The use of molecular approaches such as DNA-metabarcoding may...

On the spread of microbes that manipulate reproduction in marine invertebrates

Matthew Kustra & Tyler Carrier
Bacterial symbionts are functionally integral to animal reproduction and development, some of which have evolved additional mechanisms to override these host programs. One habitat that is increasingly recognized to contain phylogenetically related lineages of reproductive manipulators is the ocean. The reproduction of marine invertebrates often occurs by free-spawning instead of by the physical contact of copulation in terrestrial systems. We developed an integrated model to understand whether and when microbes that manipulate host reproduction by...

Shear strength data of box core sediments during SONNE cruise SO242/1

Jens Greinert, Johannes Post & Andrea Koschinsky

Registration Year

  • 2022
    14

Resource Types

  • Text
    8
  • Dataset
    5
  • Output Management Plan
    1

Affiliations

  • GEOMAR Helmholtz Centre for Ocean Research Kiel
    13
  • Alfred Wegener Institute for Polar and Marine Research
    3
  • Helmholtz Centre for Environmental Research
    2
  • Columbia University
    2
  • Texas A&M University
    2
  • British Antarctic Survey
    2
  • Hokkaido University
    2
  • University of Bremen
    2
  • Keele University
    1
  • University of Adelaide
    1