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  • 1
    Electronic Resource
    Electronic Resource
    Stable Isotopes of Nitrogen in Fossil Cladoceran Exoskeletons: Implications for Nitrogen Sources in the Central Baltic Sea During the Past Century (1998)
    Springer
    Naturwissenschaften 85 (1998), S. 597-603 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Notes: 15 N of bulk sediment, organic carbon concentrations, and abundances of exoskeletons of Bosmina longispina maritima in the sediment, the data are used to evaluate significant sources of nitrogen in the food web over the past century. Nitrogen isotopic composition of bulk sediments ranges from 2.5 to 4.5ö, that of exokeletons varies between 0.4 and 6.2ö. The two are positively correlated. A marked increase in the abundance of Bosmina since 1965 (from less than 500 specimen to more than 5000 specimen cm3 of sediment) is correlated with a significant increase in sedimentary organic carbon concentrations (from 4% to more than 10%). The isotopic data do not identify increased land-derived nitrate as the dominant nitrogen source fuelling the increase. Instead, we postulate that nitrogen fixation by diazotrophic bacteria has been one of the larger sources of nitrogen in the Baltic Sea, as it is today.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001140050558
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Blaue Liste Institute (1999)
    Weinheim : Wiley-Blackwell
    Biologie in unserer Zeit 29 (1999), S. 256-256 
    Details
    ISSN: 0045-205X
    Keywords: Life and Medical Sciences
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: No Asbstract.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/biuz.960290411
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Pelagisches System und vertikaler Partikelfluss im Herbst in der Grönländischen See, Jan Mayen Strom : POSEIDON-Reise 173,2 [POS173/2] vom 14. August bis zum 10. September 1990 ; Teilprojekt A1 und A4 des Sonderforschungsbereiches 313 der Universität Kiel = The pelagic system and vertikal particle flux during autumn in the Greenland Sea, Jan Mayen Current (1990)
    Institut für Meereskunde der Universität Kiel
    In:  Berichte aus dem Sonderforschungsbereich 313, Sedimentation im Europäischen Nordmeer, 26 . Institut für Meereskunde der Universität Kiel, Kiel, Germany, 54 pp.
    Details
    Publication Date: 2020-08-06
    Type: Report , NonPeerReviewed
    Format: text
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    OceanRep: Report - Cruise Report
  • 4
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    Forschungsschiff / Research Vessel MARIA S. MERIAN Reise Nr. MSM01 /1 – MSM01/3 Cruise No. MSM01 /1 – MSM01/3 16. Februar – 19. Mai 2006 (2006)
    Leitstelle Dt. Forschungsschiffe
    In:  Forschungsschiff Maria S. Merian : Reise Nr. MSM ... = Research vessel Maria S. Merian, 01 . Leitstelle Dt. Forschungsschiffe, Hamburg, Germany, 45 pp.
    Details
    Publication Date: 2013-04-10
    Type: Report , NonPeerReviewed
    Format: text
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    OceanRep: Report - Cruise Report
  • 5
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    Pelagic processes and vertical flux of particles: an overview of a long-term comparative study in the Norwegian Sea and Greenland Sea (1995)
    Springer
    In:  Geologische Rundschau, 84 . pp. 11-27.
    Details
    Publication Date: 2019-09-23
    Description: Pelagic processes and their relation to vertical flux have been studied in the Norwegian and Greenland Seas since 1986. Results of long-term sediment trap deployments and adjoining process studies are presented, and the underlying methodological and conceptional background is discussed. Recent extension of these investigations at the Barents Sea continental slope are also presented. With similar conditions of input irradiation and nutrient conditions, the Norwegian and Greenland Seas exhibit comparable mean annual rates of new and total production. Major differences can be found between these regions, however, in the hydrographic conditions constraining primary production and in the composition and seasonal development of the plankton. This is reflected in differences in the temporal patterns of vertical particle flux in relation to new production in the euphotic zone, the composition of particles exported and in different processes leading to their modification in the mid-water layers. In the Norwegian Sea heavy grazing pressure during early spring retards the accumulation of phytoplankton stocks and thus a mass sedimentation of diatoms that is often associated with spring blooms. This, in conjunction with the further seasonal development of zooplankton populations, serves to delay the annual peak in sedimentation to summer or autumn. Carbonate sedimentation in the Norwegian Sea, however, is significantly higher than in the Greenland Sea, where physical factors exert a greater control on phytoplankton development and the sedimentation of opal is of greater importance. In addition to these comparative long-term studies a case study has been carried out at the continental slope of the Barents Sea, where an emphasis was laid on the influence of resuspension and across-slope lateral transport with an analysis of suspended and sedimented material.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/BF00192239
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
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    Poseidon-Reise 141-2/142 [POS141/2 u. POS142] vom 17.10.87 bis 18.11.87 : Poseidon-Reise 146/1 [POS146/1] vom 25.4.88 bis 11.5.88 ; Poseidon Reise 146/3 [POS146/3] vom 29.5.88 bis 19.6.88 ; Berichte der Fahrtleiter (1988)
    Institut für Meereskunde der Universität Kiel
    In:  Berichte aus dem Sonderforschungsbereich 313, Sedimentation im Europäischen Nordmeer, 11 . Institut für Meereskunde der Universität Kiel, Kiel, Germany, 66 pp.
    Details
    Publication Date: 2020-08-06
    Type: Report , NonPeerReviewed
    Format: text
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    OceanRep: Report - Cruise Report
  • 7
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    Particle Flux across the Mid-European Continental Margin (1999)
    Elsevier
    In:  Deep Sea Research Part I: Oceanographic Research Papers, 46 . pp. 1999-2024.
    Details
    Publication Date: 2016-10-20
    Description: Results are presented from particle flux studies using sediment trap and current meter moorings along a transect at the European continental margin at 49°N within the EU-funded Ocean Margin Exchange (OMEX) project. Two moorings were placed, at the mid- and outer slope in water depths of 1500 and 3660 m, with traps at 600 and 1050 m and at 580, 1440 and 3220 m, respectively. Residual currents at the mid-slope follow the slope contour, whereas seasonal off-slope flow was registered at the outer slope. At 600 m on the slope fluxes are similar to those in the abyssal North Atlantic. The flux of all components (bulk dry weight, particulate organic and inorganic carbon, lithogenic matter and opal) increased with water depth. Highest fluxes were recorded at 1440 m at the outer slope, where off-slope residual currents mediate particle export. The injection of biogenic and lithogenic particles below the depth of winter mixing results in the export of particles from shallower waters. Calculated lateral fluxes of particulate organic carbon exceed the primary flux by over a factor of 2 at 1440 m on the outer slope. Estimated lateral fluxes of suspended particulate matter in the water column and intermediate nepheloid layers at the outer slope are potentially large compared to sinking fluxes measured by sediment traps. A comparison is made of particle flux at three continental margin sites and two sites in the adjacent open North Atlantic, from which it is seen that bulk and organic matter flux increases exponentially with proximity to the shelf break. The percentage contribution of particulate organic carbon to biogenic fluxes increases from a mean of 5.7% in the abyssal N. Atlantic to 13.9% at the continental margins
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/S0967-0637(99)00041-2
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 8
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    Biomass of microzooplankton measured on water bottle samples during POLARSTERN cruise ANT-X/6 (2002)
    PANGAEA
    Details
    Publication Date: 2023-03-25
    Keywords: ANT-X/6; Ciliates, biomass as carbon; Ciliates, heterotrophic, biomass as carbon; Ciliates, loricate, biomass as carbon; Ciliates indeterminata, biomass as carbon; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Diatoms, biomass as carbon; Dinoflagellates, biomass as carbon; Elevation of event; Epifluorescence microscopy; Event label; Foraminifera, biomass as carbon; Global Environmental Change: The Northern North Atlantic; Latitude of event; Longitude of event; Phytoplankton, biomass as carbon; Phytoplankton, other, biomass as carbon; Polarstern; Protozoa, biomass as carbon; PS22; PS22/870C2; PS22/877C1; PS22/886C1; PS22/886C2; PS22/891C1; PS22/897C1; PS22/903C1; PS22/909C1; PS22/915C1; PS22/918C1; PS22/930C1; PS22/945C1; PS22/949C1; PS22/953C1; PS22/960C1; PS22/969C1; Quantitative phytoplankton method (Utermöhl, 1958); Radiolarians, biomass as carbon; SFB313; South Atlantic Ocean; Strobilidium spp., biomass as carbon; Strombidium spp., biomass as carbon
    Type: Dataset
    Format: text/tab-separated-values, 1274 data points
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    DATA PANGAEA
  • 9
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    Geochemistry of sediment core ARA-6/98-BBTB (1999)
    PANGAEA
    Details
    Publication Date: 2023-03-07
    Keywords: ARA-6/98; ARA-6/98-BBTB; Aranda (1989); Arsenic; Arsenic, standard deviation; Baltic Sea System Study; BASYS; Bornholm Basin, Baltic Sea; Bromine; Bromine, standard deviation; Calcium; Calcium, standard deviation; Chromium; Chromium, standard deviation; Cobalt; Cobalt, standard deviation; Copper; Copper, standard deviation; DEPTH, sediment/rock; Energy dispersive X-ray analysis, EDAX; Gallium; Gallium, standard deviation; GEMAX; GNC_X; Iron; Iron, standard deviation; Manganese; Manganese, standard deviation; Molybdenum; Molybdenum, standard deviation; Nickel; Nickel, standard deviation; Niobium; Niobium, standard deviation; Potassium; Potassium, standard deviation; Rubidium; Rubidium, standard deviation; Rubidium/Strontium ratio; Selenium; Selenium, standard deviation; Strontium; Strontium, standard deviation; Titanium; Titanium, standard deviation; Vanadium; Vanadium, standard deviation; Yttrium; Yttrium, standard deviation; Zinc; Zinc, standard deviation; Zirconium; Zirconium, standard deviation; Zirconium/Niobium ratio; Zirconium/Strontium ratio
    Type: Dataset
    Format: text/tab-separated-values, 1525 data points
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    DATA PANGAEA
  • 10
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    Particle flux measured on deep sea sediment trap VP-2_trap (Appendix A2.7) (2006)
    PANGAEA
    In:  Supplement to: Bathmann, Ulrich; Peinert, Rolf; Noji, Thomas T; von Bodungen, Bodo (1990): Pelagic origin and fate of sedimenting particles in the Norwegian Sea. Progress in Oceanography, 24(1-4), 117-125, https://doi.org/10.1016/0079-6611(90)90024-V
    Details
    Publication Date: 2023-03-16
    Description: A 17 month record of vertical particle flux of dry weight, carbonate and organic carbon were 25.8, 9.4 and 2.4g/m**2/y, respectively. Parallel to trap deployments, pelagic system structure was recorded with high vertical and temporal resolution. Within a distinct seasonal cycle of vertical particle flux, zooplankton faecal pellets of various sizes, shapes and contents were collected by the traps in different proportions and quantities throughout the year (range: 0-4,500 10**3/m**2/d). The remains of different groups of organisms showed distinct seasonal variations in abundance. In early summer there was a small maximum in the diatom flux and this was followed by pulses of tinntinids, radiolarians, foraminiferans and pteropods between July and November. Food web interactions in the water column were important in controlling the quality and quantity of sinking materials. For example, changes in the population structure of dominant herbivores, the break-down of regenerating summer populations of microflagellates and protozooplankton and the collapse of a pteropod dominated community, each resulted in marked sedimentation pulses. These data from the Norwegian Sea indicate those mechanisms which either accelerate or counteract loss of material via sedimentation. These involve variations in the structure of the pelagic system and they operatè on long (e.g. annual plankton succession) and short (e.g. the end of new production, sporadic grazing of swarm feeders) time scales. Connecting investigation of the water column with a high resolution in time in parallel with drifting sediment trap deployments and shipboard experiments with the dominant zooplankters is a promising approach for giving a better understanding of both the origin and the fate of material sinking to the sea floor.
    Keywords: AWI_BioOce; Biological Oceanography @ AWI; DATE/TIME; Date/time end; Duration, number of days; Flux of total mass; Lithogenic, flux; Norwegian Sea; Sample code/label; Trap, sediment; TRAPS; VP-2_trap
    Type: Dataset
    Format: text/tab-separated-values, 55 data points
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    DATA PANGAEA
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