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  • Data  (4)
  • OceanRep  (4)
  • 2015-2019  (8)
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  • 1
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    Leben am Meeresboden (2017)
    Springer
    In:  In: Faszination Meeresforschung : ein ökologisches Lesebuch. , ed. by Hempel, G., Bischof, K. and Hagen, W. Springer, Heidelberg, Germany, pp. 179-210. 2. Aufl. ISBN 978-3-662-49713-5
    Details
    Publication Date: 2020-04-03
    Type: Book chapter , NonPeerReviewed
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Book chapter
  • 2
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    New High-Tech Flexible Networks for the Monitoring of Deep-Sea Ecosystems (2019)
    American Chemistry Society
    In:  Environmental Science & Technology, 53 (12). pp. 6616-6631.
    Details
    Publication Date: 2022-01-31
    Description: Increasing interest in the acquisition of biotic and abiotic resources from within the deep sea (e.g., fisheries, oil–gas extraction, and mining) urgently imposes the development of novel monitoring technologies, beyond the traditional vessel-assisted, time-consuming, high-cost sampling surveys. The implementation of permanent networks of seabed and water-column-cabled (fixed) and docked mobile platforms is presently enforced, to cooperatively measure biological features and environmental (physicochemical) parameters. Video and acoustic (i.e., optoacoustic) imaging are becoming central approaches for studying benthic fauna (e.g., quantifying species presence, behavior, and trophic interactions) in a remote, continuous, and prolonged fashion. Imaging is also being complemented by in situ environmental-DNA sequencing technologies, allowing the traceability of a wide range of organisms (including prokaryotes) beyond the reach of optoacoustic tools. Here, we describe the different fixed and mobile platforms of those benthic and pelagic monitoring networks, proposing at the same time an innovative roadmap for the automated computing of hierarchical ecological information on deep-sea ecosystems (i.e., from single species’ abundance and life traits to community composition, and overall biodiversity).
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1021/acs.est.9b00409
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    Physical and hydrodynamic properties of deep sea mining-generated, abyssal sediment plumes in the Clarion Clipperton Fracture Zone (eastern-central Pacific) (2019)
    BioOne
    In:  Elementa: Science of the Anthropocene, 7 (1). p. 5.
    Details
    Publication Date: 2022-01-31
    Description: The anthropogenic impact of polymetallic nodule harvesting in the Clarion-Clipperton Fracture Zone is expected to strongly affect the benthic ecosystem. To predict the long-term, industrial-scale impact of nodule mining on the deep-sea environment and to improve the reliability of the sediment plume model, information about the specific characteristics of deep-sea particles is needed. Discharge simulations of mining-related fine-grained (median diameter ≈ 20 μm) sediment plumes at concentrations of 35–500 mg L–1 (dry weight) showed a propensity for rapid flocculation within 10 to 135 min, resulting in the formation of large aggregates up to 1100 μm in diameter. The results indicated that the discharge of elevated plume concentrations (500 mg L–1) under an increased shear rate (G ≥ 2.4 s–1) would result in improved efficiency of sediment flocculation. Furthermore, particle transport model results suggested that even under typical deep-sea flow conditions (G ≈ 0.1 s–1), rapid deposition of particles could be expected, which would restrict heavy sediment blanketing (several centimeters) to a smaller fall-out area near the source, unless subsequent flow events resuspended the sediments. Planning for in situ tests of these model projections is underway
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1525/elementa.343
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Heavy-Metal-Resistant Microorganisms in Deep-Sea Sediments Disturbed by Mining Activity: An Application Toward the Development of Experimental in vitro Systems (2019)
    Frontiers
    In:  Frontiers in Marine Science, 6 (462).
    Details
    Publication Date: 2022-01-31
    Description: Future mining of polymetallic nodules in the Clarion Clipperton Zone (Northeastern Pacific) is expected to affect all benthic ecosystems. The diversity, distribution, and environmental functions of microorganisms inhabiting abyssal sediments are barely understood. To understand consequences of deep-sea mining, experimental in vitro systems needs to be established to test hypotheses on the environmental impact of mining. For this, 40 bacterial strains, belonging to proteobacteria, actinobacteria and firmicutes were isolated from deep-sea sediments and nodules sampled at depths of ≥ 4000 m. Phenotypic characterization revealed a strong inter-species and moderate intra-species variability. Determination of metal minimum inhibitory concentrations indicated the presence of acute manganese-resistant bacteria such as Rhodococcus erythropolis (228.9 mM), Loktanella cinnabarina (57.2 mM), and Dietzia maris (14.3 mM) that might be suitable systems for testing the effects of release of microbes from nodules and their interactions with sediment particles in plumes generated during mining. Comparative genomic analysis indicated the presence of manganese efflux systems relevant for future transcriptomics or proteomics approaches with environmental samples and might serve in paving the way to develop model systems including representative organisms which are currently not cultivable. Monitoring deep-sea mining activity at abyssal depth is a challenge that has to be tackled. We proposed the use of API strips as a fast on-board methodology for bacterial monitoring as an indicator for sediment plume dispersions within the water column.
    Type: Article , PeerReviewed
    Format: text
    Format: other
    DOI: 10.3389/fmars.2019.00462
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
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    Hydrostatic pressure affects aggregate transformation and organic carbon transport: in and beyond the twilight zone: Experiment December 2010 (2015)
    PANGAEA
    Details
    Publication Date: 2023-03-14
    Description: This work aimed to explore evaluated the effects of the increased of hydrostatic pressure on a defined bacterial community on aggregates formed from an axenic culture of marine diatoms by simulating sedimentation to the deep sea by increase of hydrostatic pressure up to 30 bar (equivalent to 3000 m water depth) against control at ambient surface pressure. Our hypothesis was that microbial colonization and community composition and thus microbial OM turnover is greatly affected by changes in hydrostatic pressure during sinking to the deep ocean.
    Keywords: Alanine; Amino acid, total hydrolysable; Amino acids; Arginine; Aspartic acid; Aspartic acid/beta-Alanine ratio; beta-Alanine; BIOACID; Biological Impacts of Ocean Acidification; Carbon, inorganic, particulate; Carbon, organic, particulate; Carbon, total; Carbon/Nitrogen ratio; Dauwe index; Experimental treatment; gamma-Aminobutyric acid; Glutamic acid; Glutamic acid/gamma-Aminobutyric acid ratio; Glycine; Histidine; Isoleucine; Leucine; Lysine; Methionine; Nitrogen, total; Ornithine; Particle concentration; pH; Phenylalanine; Ratio; Serine; Sinking velocity; Size; Threonine; Time in hours; Tyrosine; Valine
    Type: Dataset
    Format: text/tab-separated-values, 552 data points
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    DATA PANGAEA
  • 6
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    Effects of Ocean Acidification on the Ballast of Surface Aggregates Sinking through the Twilight Zone (2015)
    PANGAEA
    In:  Supplement to: Mendes, Pedro André; Thomsen, Laurenz (2012): Effects of Ocean Acidification on the Ballast of Surface Aggregates Sinking through the Twilight Zone. PLoS ONE, 7(12), e50865, https://doi.org/10.1371/journal.pone.0050865
    Details
    Publication Date: 2023-02-24
    Description: The dissolution of CaCO3 is one of the ways ocean acidification can, potentially, greatly affect the ballast of aggregates. A diminution of the ballast could reduce the settling speed of aggregates, resulting in a change in the carbon flux to the deep sea. This would mean lower amounts of more refractory organic matter reaching the ocean floor. This work aimed to determine the effect of ocean acidification on the ballast of sinking surface aggregates. Our hypothesis was that the decrease of pH will increase the dissolution of particulate inorganic carbon ballasting the aggregates, consequently reducing their settling velocity and increasing their residence time in the upper twilight zone. Using a new methodology for simulation of aggregate settling, our results suggest that future pCO2 conditions can significantly change the ballast composition of sinking aggregates. The change in aggregate composition had an effect on the size distribution of the aggregates, with a shift to smaller aggregates. A change also occurred in the settling velocity of the particles, which would lead to a higher residence time in the water column, where they could be continuously degraded. In the environment, such an effect would result in a reduction of the carbon flux to the deep-sea. This reduction would impact those benthic communities, which rely on the vertical flow of carbon as primary source of energy.
    Keywords: BIOACID; Biological Impacts of Ocean Acidification
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 7
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    Effects of Ocean Acidification on the Ballast of Surface Aggregates Sinking through the Twilight Zone: organic and inorganic carbon content (2015)
    PANGAEA
    Details
    Publication Date: 2023-02-24
    Keywords: BIOACID; Biological Impacts of Ocean Acidification; Carbon, inorganic, particulate; Carbon, organic, particulate; Carbon dioxide, partial pressure; Experimental treatment; Sample code/label; Standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 56 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Effects of Ocean Acidification on the Ballast of Surface Aggregates Sinking through the Twilight Zone: settling velocity and particle size (2015)
    PANGAEA
    Details
    Publication Date: 2023-07-11
    Keywords: BIOACID; Biological Impacts of Ocean Acidification; Carbon dioxide, partial pressure; Sample code/label; Sinking velocity; Sinking velocity, standard deviation; Size; Size fraction; Standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 364 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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