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  • PANGAEA  (51)
  • Springer  (3)
  • 2020-2024  (54)
  • 2020-2022
Document type
Keywords
Publisher
Years
Year
  • 1
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    Risk Assessment for Deep-Seabed Mining (2022)
    Springer
    Details
    Publication Date: 2023-10-06
    Description: Uncertainties concerning deep-seabed mining relate to the expected impacts on the abyssal benthic and pelagic environment and its ecosystems but also include geopolitical, economic, societal and cultural uncertainty. The uncertain impacts from mining lead to anxiety and a low societal acceptance for the activity and are not the same for everybody at the same time. Hence, uncertainty is an important element of the risk involved in deep-seabed mining. This chapter describes the different risks involved, develops a methodology for risk assessment for the exploitation of marine mineral resources that takes into consideration the state of knowledge and evolving research on deep-sea ecosystems, and informs on possible environmental threshold values in relation to deep-seabed mining operations.
    Type: Book chapter , NonPeerReviewed
    Format: text
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    OceanRep: Book chapter
  • 2
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    Digging deep: lessons learned from meiofaunal responses to a disturbance experiment in the Clarion-Clipperton Zone (2023)
    Springer
    Details
    Publication Date: 2024-02-07
    Description: The deep-sea mining industry is currently at a point where large-sale, commercial polymetallic nodule exploitation is becoming a more realistic scenario. At the same time, certain aspects such as the spatiotemporal scale of impacts, sediment plume dispersion and the disturbance-related biological responses remain highly uncertain. In this paper, findings from a small-scale seabed disturbance experiment in the German contract area (Clarion-Clipperton Zone, CCZ) are described, with a focus on the soft-sediment ecosystem component. Despite the limited spatial scale of the induced disturbance on the seafloor, this experiment allowed us to evaluate how short-term (〈 1 month) soft-sediment changes can be assessed based on sediment characteristics (grain size, nutrients and pigments) and metazoan meiofaunal communities (morphological and metabarcoding analyses). Furthermore, we show how benthic measurements can be combined with numerical modelling of sediment transport to enhance our understanding of meiofaunal responses to increased sedimentation levels. The lessons learned within this study highlight the major issues of current deep-sea mining-related ecological research such as deficient baseline knowledge, unrepresentative impact intensity of mining simulations and challenges associated with sampling trade-offs (e.g., replication).
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    Rapid shipboard measurement of net-collected marine microplastic polymer types using near-infrared hyperspectral imaging (2023)
    Springer
    Details
    Publication Date: 2024-03-14
    Description: Isolation and detection of microplastics (MP) in marine samples is extremely cost- and labor-intensive, limiting the speed and amount of data that can be collected. In the current work, we describe rapid measurement of net-collected MPs (net mesh size 300 µm) using a benchtop near-infrared hyperspectral imaging system during a research expedition to the subtropical North Atlantic gyre. Suspected plastic particles were identified microscopically and mounted on a black adhesive background. Particles were imaged with a Specim FX17 near-infrared linescan camera and a motorized stage. A particle mapping procedure was built on existing edge-finding algorithms and a polymer identification method developed using spectra from virgin polymer reference materials. This preliminary work focused on polyethylene, polypropylene, and polystyrene as they are less dense than seawater and therefore likely to be found floating in the open ocean. A total of 27 net tows sampled 2534 suspected MP particles that were imaged and analyzed at sea. Approximately 77.1% of particles were identified as polyethylene, followed by polypropylene (9.2%). A small fraction of polystyrene was detected only at one station. Approximately 13.6% of particles were either other plastic polymers or were natural materials visually misidentified as plastics. Particle size distributions for PE and PP particles with a length greater than 1 mm followed an approximate power law relationship with abundance. This method allowed at-sea, near real-time identification of MP polymer types and particle dimensions, and shows great promise for rapid field measurements of microplastics in net-collected samples.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Stable oxygen and hydrogen isotopic composition of pore water (δ18O-H2O; δ2H-H2O) prepared from MeBo core GeoB22603-1 recovered from the Danube Deep-Sea Fan (2020)
    PANGAEA
    Details
    Publication Date: 2023-04-27
    Keywords: Black Sea; Center for Marine Environmental Sciences; Danube deep sea fan; DEPTH, sediment/rock; Device type; gas hydrate; GeoB22603-1; light hydrocarbons; M142; M142_03-1; MARUM; MeBo200; Meteor (1986); Methane; Method/Device of event; Optional event label; pore water; RV Meteor; Sample type; Submarine Gas Hydrate Resources; SUGAR; SUGAR project; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 68 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Stable oxygen and hydrogen isotopic composition of pore water (δ18O-H2O; δ2H-H2O) prepared from MeBo core GeoB22620-1 recovered from the Danube Deep-Sea Fan (2020)
    PANGAEA
    Details
    Publication Date: 2023-04-27
    Keywords: Black Sea; Center for Marine Environmental Sciences; Danube deep sea fan; DEPTH, sediment/rock; Device type; gas hydrate; GeoB22620-1; light hydrocarbons; M142; M142_21-1; MARUM; MeBo200; Meteor (1986); Methane; Method/Device of event; Optional event label; pore water; RV Meteor; Sample type; Submarine Gas Hydrate Resources; SUGAR; SUGAR project; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 12 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Stable oxygen and hydrogen isotopic composition of pore water (δ18O-H2O; δ2H-H2O) prepared from MeBo core GeoB22605-1 recovered from the Danube Deep-Sea Fan (2020)
    PANGAEA
    Details
    Publication Date: 2023-04-27
    Keywords: Black Sea; Center for Marine Environmental Sciences; Danube deep sea fan; DEPTH, sediment/rock; Device type; gas hydrate; GeoB22605-1; light hydrocarbons; M142; M142_06-1; MARUM; MeBo200; Meteor (1986); Methane; Method/Device of event; Optional event label; pore water; RV Meteor; Sample type; Submarine Gas Hydrate Resources; SUGAR; SUGAR project; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 52 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Heat flow data during Maria S. Merian cruise MSM34/2 (2020)
    PANGAEA
    Details
    Publication Date: 2023-04-27
    Description: Data for estimating heat flow in the western Black Sea are provided, based on measurements made during Expedition MSM34 (R/V Maria S. Merian). Data are located in the Bulgarian and Romanian Sector of the Black Sea in water depths ranging from 420 to 1500 m. Data were always collected with the GEOMAR-owned 6 m long heat-probe tool, consisting of 22 Thermistors (at 26 cm spacing) along a sensor-string, a reference pressure gauge and calibration thermometer (T100 sensor). Raw data are required to be calibrated relative to the T100 sensor. Calibration data for both expeditions are provided in form of temperature offsets for each thermistor. Data provided include per station all original (raw) data for each deployment (temperature as function of time, pressure/Depth) for each thermistor, as well as initial results after separating each individual measurement sequence into penetration files (pen-files) where the temperature calibration has been applied. Results report an average thermal Gradient, heat-flux and thermal conductivity over the total penetraiton Depth of 6m. Detailed information (temperature and thermal conductivity as function of depth at each location) is given in graphical form as well as ascii data per individual penetration.
    Keywords: Black Sea; Comment; Conductivity, thermal; Depth, bathymetric; Event label; File content; File format; File name; File size; heat flow; Heat flow; Heat-Flow probe; HF; LATITUDE; LONGITUDE; Maria S. Merian; MSM34/2; MSM34/2_003-1; MSM34/2_028-1; MSM34/2_029-1; MSM34/2_030-1; MSM34/2_031-1; MSM34/2_032-1; MSM34/2_033-1; MSM34/2_034-1; MSM34/2_035-1; MSM34/2_036-1; MSM34/2_037-1; MSM34/2_038-1; MSM34/2_044-1; MSM34/2_045-1; MSM34/2_046-1; MSM34/2_047-1; MSM34/2_048-1; MSM34/2_049-1; MSM34/2_050-1; MSM34/2_067-1; MSM34/2_068-1; MSM34/2_069-1; MSM34/2_070-1; MSM34/2_071-1; MSM34/2_072-1; MSM34/2_072-2; MSM34/2_073-1; MSM34/2_076-1; MSM34/2_077-1; MSM34/2_078-1; MSM34/2_079-1; MSM34/2_080-1; MSM34/2_081-1; MSM34/2_082-1; MSM34/2_083-1; MSM34/2_084-1; MSM34/2_085-1; MSM34/2_086-1; MSM34/2_087-1; MSM34/2_088-1; Sample code/label; Station label; Temperature gradient; Uniform resource locator/link to file
    Type: Dataset
    Format: text/tab-separated-values, 442 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Chemical composition of pyrosome carcasses collected during SONNE cruise SO242/2 (2022)
    PANGAEA
    Details
    Publication Date: 2023-07-04
    Description: During RV SONNE cruise SO242/2 (September 2015) to the DISCOL site in the Peru Basin (SE Pacific), pyrosome carcasses were collected at the seafloor. Aboard, these carcasses were stored frozen and in the lab on land, they were freeze-dried and ground to fine powder. Their carbon and nitrogen content, δ13C and δ15N were measured on an elemental analyzer coupled with a isotope ratio mass spectrometer (EA-c-IRMS).
    Keywords: C/N content; Carbon; Carbon/Nitrogen ratio; COLBOX; Collector Box; CTD/Rosette; CTD-RO; Date/Time of event; DISCOL; Elementar Analyzer coupled to an Isotope Ratio Mass Spectrometer (EA-IRMS); Elevation of event; Event label; JPI-OCEANS; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Latitude of event; Longitude of event; Nitrogen; Peru Basin; pyrosome; Sample code/label; SO242/2; SO242/2_176_COLBOX-salp; SO242/2_179_COLBOX-salp; SO242/2_204-1; Sonne_2; South Pacific Ocean; South Pacific Ocean, Peru Basin; δ13C; δ15N
    Type: Dataset
    Format: text/tab-separated-values, 18 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Total fatty acids from pyrosome carcasses collected during SONNE cruise SO242/2 (2022)
    PANGAEA
    Details
    Publication Date: 2023-07-04
    Description: During RV SONNE cruise SO242/2 (September 2015) to the DISCOL site in the Peru Basin (SE Pacific), pyrosome carcasses were collected at the seafloor. Aboard, these carcasses were stored frozen and in the lab on land, they were freeze-dried and ground to fine powder. Total fatty acid in pyrosome tissue were extracted following the Bligh and Dyer method and their isotopic compositions and concentrations were measured on a gas chromatograph coupled with an isotopic ratio mass spectrometer (EA-c-IRMS).
    Keywords: COLBOX; Collector Box; CTD/Rosette; CTD-RO; Date/Time of event; DISCOL; Elevation of event; Event label; Fatty acids, total; Fatty acids, δ13C; JPI-OCEANS; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Latitude of event; Longitude of event; Peru Basin; pyrosome; Sample code/label; SO242/2; SO242/2_176_COLBOX-salp; SO242/2_179_COLBOX-salp; SO242/2_204-1; Sonne_2; South Pacific Ocean; South Pacific Ocean, Peru Basin; total fatty acid
    Type: Dataset
    Format: text/tab-separated-values, 375 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Phospholipid fatty acids of sediment push cores during SONNE cruise SO242/2 (2022)
    PANGAEA
    Details
    Publication Date: 2023-07-04
    Description: During RV SONNE cruise SO242/2 (September 2015) to the DISCOL site in the Peru Basin (SE Pacific) push cores of sediment were taken in the abyssal plains with ROV Kiel 6000 (GEOMAR). The sediment cores were sliced in 0-2 and 2-5 cm intervals and stored frozen until further processing ashore. In the lab on land, sediment samples were freeze-dried, ground to fine powder, phospholipid-derived fatty acids (PLFAs) in the sediment were extracted following the Bligh and Dyer method and they were measured on a gas chromatograph coupled with an isotopic ratio mass spectrometer (EA-c-IRMS).
    Keywords: Date/Time of event; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DISCOL; Elevation of event; Event label; JPI-OCEANS; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Laboratory code/label; Latitude of event; Longitude of event; Peru Basin; Phospholipid fatty acids; Phospholipid fatty acids, δ13C; PLFA; PUC; Push corer; Sample code/label; SO242/2; SO242/2_166_PUC-74-24-10; SO242/2_183_PUC-81-69-33; SO242/2_202_PUC-46-61-79; Sonne_2; South Pacific Ocean; Station label
    Type: Dataset
    Format: text/tab-separated-values, 774 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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