95 Works

Die Vermessung des Meeresbodens

Anne-Cathrin Wölfl
Betrachtet man eine Weltkarte, scheint jeder Winkel der Erde lückenlos kartiert. Selbst der Meeresboden wirkt auf Karten so, als ob bekannt sei, wie seine Oberfläche in der Tiefe der Ozeane aussieht. Dabei ist nur ein Bruchteil davon bisher erforscht.

CO2-Speicherung unterhalb des Meeresbodens?

Oliver Jorzik & Klaus Wallmann
Ist es möglich, Treibhausgase in der Nordsee zu speichern? Mit welchen Chancen und Risiken auf Ökosysteme wären derartige Speicherungen verbunden? Und helfen sie im Kampf gegen den Klimawandel?

Invasive Arten als Chance? Interview

Martin Wahl
ESKP-Themenspezial: Biodiversität

Towards common file formats and data standards for seafloor geodesy

Pierre Sakic, Valerie Ballu, Heidrun Kopp, Dietrich Lange & Jean-Yves Royer

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...

Data from: Anthropogenic hybridization between endangered migratory and commercially harvested stationary whitefish taxa (Coregonus spp.)

Jan Dierking, Luke Phelps, Kim Præbel, Gesine Ramm, Enno Prigge, Jost Borcherding, Matthias Brunke & Christophe Eizaguirre
Natural hybridization plays a key role in the process of speciation. However, anthropogenic (human induced) hybridization of historically isolated taxa raises conservation issues. Due to weak barriers to gene flow and the presence of endangered taxa, the whitefish species complex is an excellent study system to investigate the consequences of hybridization in conservation. We focused on three naturally reproductively isolated whitefish taxa in Germany: the endangered, anadromous North Sea houting (NSH) and Baltic houting (BH),...

Data from: Effects of experimental warming on biodiversity depend on ecosystem type and local species composition

Daniel S. Gruner, Matthew E. S. Bracken, Stella A. Berger, Britas Klemens Eriksson, Lars Gamfeldt, Birte Matthiessen, Stefanie Moorthi, Ulrich Sommer & Helmut Hillebrand
Climatic warming is a primary driver of change in ecosystems worldwide. Here, we synthesize responses of species richness and evenness from 187 experimental warming studies in a quantitative meta-analysis. We asked 1) whether effects of warming on diversity were detectable and consistent across terrestrial, freshwater and marine ecosystems, 2) if effects on diversity correlated with intensity, duration, and experimental unit size of temperature change manipulations, and 3) whether these experimental effects on diversity interacted with...

Data from: The contribution of post-copulatory mechanisms to incipient ecological speciation in sticklebacks

Joshka Kaufmann, Christophe Eizaguirre, Manfred Milinski & Tobias L. Lenz
Ecology can play a major role in species diversification. As individuals are adapting to contrasting habitats, reproductive barriers may evolve at multiple levels. While pre-mating barriers have been extensively studied, the evolution of post-mating reproductive isolation during early stages of ecological speciation remains poorly understood. In diverging three-spined stickleback ecotypes from two lakes and two rivers, we observed differences in sperm traits between lake and river males. Interestingly, these differences did not translate into ecotype-specific...

Biometric conversion factors as a unifying platform for comparative assessment of invasive freshwater bivalves

Neil Coughlan, Eoghan Cunningham, Ross Cuthbert, Patrick Joyce, Pedro Anastacio, Filipe Banha, Nicolás Bonel, Stephanie Bradbeer, Elizabeta Briski, Vincent Butitta, Zuzana Čadková, Jaimie Dick, Karel Douda, Lawrence Eagling, Noé Ferreira-Rodríguez, Leandro Hünicken, Mattias Johansson, Louise Kregting, Anna Labecka, Deliang Li, Florencia Liquin, Jonathan Marescaux, Todd Morris, Patrycja Nowakowska, Małgorzata Ożgo … & Francisco Sylvester
1. Invasive bivalves continue to spread and negatively impact freshwater ecosystems worldwide. As different metrics for body size and biomass are frequently used within the literature to standardise bivalve related ecological impacts (e.g. respiration and filtration rates), the lack of broadly applicable conversion equations currently hinders reliable comparison across bivalve populations. To facilitate improved comparative assessment amongst studies originating from disparate geographic locations, we report body size and biomass conversion equations for six invasive freshwater...

Cellular costs underpin micronutrient limitation in phytoplankton

J. Scott P. McCain, Alessandro Tagliabue, Edward Susko, Eric P. Achterberg, Andrew E. Allen & Erin M. Bertrand
Micronutrients control phytoplankton growth in the ocean, influencing carbon export and fisheries. It is currently unclear how micronutrient scarcity affects cellular processes, and how interdependence across micronutrients arises. We show that proximate causes of micronutrient growth limitation and interdependence are governed by cumulative cellular costs of acquiring and using micronutrients. Using a mechanistic proteomic allocation model of a polar diatom focused on iron and manganese, we demonstrate how cellular processes fundamentally underpin micronutrient limitation, and...

Retreat of Humboldt Gletscher, North Greenland, driven by undercutting from a warmer ocean

Eric Rignot, Lu An, Nolwenn Chauché, Mathieu Morlighem, Seongsu Jeong, Michael Wood, Jeremie Mouginot, Joshua Willis, Ingo Klaucke, Wilhelm Weinrebe & Andreas Muenchow
Humboldt Gletscher is a 100-km wide, slow-moving glacier in north Greenland which holds a 19-cm global sea level equivalent. Humboldt has been the fourth largest contributor to sea level rise since 1972 but the cause of its mass loss has not been elucidated. Multi-beam echo sounding data collected in 2019 indicate a seabed 200 m deeper than previously known. Conductivity temperature depth (CTD) data reveal the presence of warm water of Atlantic origin at 0°C...

Data from: The influence of balanced and imbalanced resource supply on biodiversity-functioning relationship across ecosystems

Aleksandra M. Lewandowska, Antje Biermann, Elizabeth T. Borer, Miguel A. Cebrian-Piqueras, Steven A. J. Declerck, Luc De Meester, Ellen Van Donk, Lars Gamfeldt, Daniel S. Gruner, Nicole Hagenah, W. Stanley Harpole, Kevin P. Kirkman, Christopher A. Klausmeier, Michael Kleyer, Johannes M. H. Knops, Pieter Lemmens, Eric M. Lind, Elena Litchman, Jasmin Mantilla-Contreras, Koen Martens, Sandra Meier, Vanessa Minden, Joslin L. Moore, Harry Olde Venterink, Eric W. Seabloom … & Helmut Hillebrand
Numerous studies show that increasing species richness leads to higher ecosystem productivity. This effect is often attributed to more efficient portioning of multiple resources in communities with higher numbers of competing species, indicating the role of resource supply and stoichiometry for biodiversity–ecosystem functioning relationships. Here, we merged theory on ecological stoichiometry with a framework of biodiversity–ecosystem functioning to understand how resource use transfers into primary production. We applied a structural equation model to define patterns...

Data from: Population genomics of local adaptation versus speciation in coral reef fishes (Hypoplectrus spp, Serranidae)

Sophie Picq, Owen McMillan, Oscar Puebla & W. Owen McMillan
Are the population genomic patterns underlying local adaptation and the early stages of speciation similar? Addressing this question requires a system in which i. local adaptation and the early stages of speciation can be clearly identified and distinguished, ii. the amount of genetic divergence driven by the two processes is similar, and iii. comparisons can be repeated both taxonomically (for local adaptation) and geographically (for speciation). Here, we report just such a situation in the...

Data from: Genetic identification of source and likely vector of a widespread marine invader

Stacy A. Krueger-Hadfield, Nicole M. Kollars, Allan E. Strand, James E. Byers, Sarah J. Shainker, Ryuta Terada, Thomas W. Greig, Marieke Hammann, David C. Murray, Florian Weinberger & Erik E. Sotka
The identification of native sources and vectors of introduced species informs its ecological and evolutionary history and may guide policies that seek to prevent future introductions. Population genetics represents a powerful set of tools to identify origins and vectors, but can mislead when the native range is poorly sampled or few molecular markers are used. Here, we traced the introduction of the Asian seaweed Gracilaria vermiculophylla (Rhodophyta) into estuaries in coastal western North America, the...

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)...

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...

Aus der Vogelperspektive. Drohnen in der Vulkanforschung

Karen Strehlow
Forschungsdrohnen ermöglichen einen völlig neuen Blick auf aktive Vulkane. Mit ihnen sind schnell hochauflösende Bilder direkt aus dem Krater und auch Daten aus anderen bisher unerreichbaren Zonen eines Vulkans zu beschaffen. Zugleich minimiert der Einsatz von Drohnen die Gefahren für Wissenschaftlerinnen und Wissenschaftler.

Seltenes Naturphänomen: Lavaseen

Jana Kandarr
Lavaseen sind eine absolute Seltenheit auf der Erde. An nur sieben Orten der Welt treten diese eindrucksvollen Naturphänomene aktuell in Erscheinung. * Lavaseen bilden sich stets über aktiven Vulkanschloten. * Ein Lavasee ist ständig in Bewegung. In der Regel kann in ihm ein horizontales Fließen wahrgenommen werden. * In stabilen, aktiven Lavaseen müssen in unterirdischen Systemen Mechanismen existieren, die zu einer permanenten Gasanreicherung führen.

Die unbekannte Welt von Unterwasser-Vulkanen

Karen Strehlow & Philipp Brandl
Die meisten Vulkanausbrüche finden dort statt, wo wir sie nur schwer beobachten können: unter Wasser. Ein kleiner Einblick in die noch junge Forschungsdisziplin der Erkundung submariner Vulkane.

Strategien zur Renaturierung von Abbaugebieten

Felix Janssen, Thomas Soltwedel & Matthias Haeckel
Mehr als 100.000 verschiedene Arten in den Ozeanen sind mittlerweile bekannt, die biologische Vielfalt ist jedoch noch weit größer und viele Arten noch nicht entdeckt. Gerade in der Tiefsee stößt man bei jeder Probenentnahme auf weitere unbekannte Arten. Belastbare Aussagen zu einer potentiellen Wiederbesiedelung abgebauter und gestörter Flächen können nur auf der Basis intensiver wissenschaftlicher Untersuchungen getroffen werden.

Regeln für den Abbau. Die Verfassung der Meere und die Internationale Meeresbodenbehörde IMB. Interview

Sven Petersen
Ein tragfähiges internationales Regelwerk, noch bevor der Run auf einen Rohstoff beginnt? Dies wäre ein Novum in der Menschheit. Die ‚United Nations Convention on the Law of the Sea‘ hat sich genau das zum Ziel gesetzt. Sie beschreibt die Hohe See mit ihren Ressourcen als gemeinsames Erbe der Menschheit. Über die Nutzung der Rohstoffe am Meeresboden wacht die Internationale Meeres­boden­behörde der Vereinten Nationen (IMB). Sie ist für alle mineralischen Ressourcen am Meeresboden zuständig. Wie funktioniert...

Wirtschaftlich interessante Gebiete, wo suchen?

Sven Petersen
Manganknollen im östlichen Pazifik, kobaltreiche Eisen-Mangan-Krusten an Vulkanhängen, Massivsulfide an Spreizungszonen – in der Tiefsee gibt es unterschiedliche Gebiete, die sich für den Rohstoffabbau eignen. Manche gehören zu den ältesten Ozeangebieten der Welt. Andere hingegen sind geologisch sehr jung.

Crust and upper mantle structure of the Ligurian Sea revealed by ambient noise tomography and receiver function analysis

Felix Noah Wolf , Dietrich Lange , Heidrun Kopp , Anke Dannowski , Ingo Grevemeyer , Wayne Crawford , Martin Thorwart , Anne Paul &
GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany (1); Kiel University (2); Institut de physique du globe de Paris, Paris, France (3); ISTerre - Institut des Sciences de la Terre, Grenoble, France (4); AlpArray Working Group: http://www.alparray.ethz.ch (5);

The Liguro-Provencal-basin was formed as a back-arc basin of the retreating Calabrian-Apennines subduction zone during the Oligocene and Miocene. The resulting rotation of the Corsica-Sardinia block is associated with rifting, shaping the Ligurian Sea. It...

Registration Year

  • 2022
    14
  • 2021
    19
  • 2020
    32
  • 2019
    5
  • 2018
    4
  • 2017
    4
  • 2016
    7
  • 2015
    2
  • 2014
    3
  • 2012
    1

Resource Types

  • Dataset
    51
  • Text
    42
  • Data Paper
    1
  • Output Management Plan
    1

Affiliations

  • GEOMAR Helmholtz Centre for Ocean Research Kiel
    93
  • Helmholtz Association of German Research Centres
    18
  • Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
    10
  • Alfred Wegener Institute for Polar and Marine Research
    8
  • Kiel University
    6
  • Smithsonian Tropical Research Institute
    4
  • Helmholtz Centre for Environmental Research
    3
  • Queen's University Belfast
    3
  • University of Münster
    3
  • University of Gothenburg
    3