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Datasets of project "Environmental Control on Carbonate Mound Formation along the European Margin"

Mostrando recursos 1 - 20 de 167

  1. Lipids and nitrogen isotopes of deep-water corals

    Kiriakoulakis, Kostas; Fisher, Elizabeth; Wolff, George A; Freiwald, André; Grehan, Anthony J; Roberts, Murray J
    The lipid and organic nitrogen isotopic (delta15N) compositions of two common deep-water corals (Lophelia pertusa and Madrepora oculata) collected from selected locations of the NE Atlantic are compared to the composition of suspended particulate organic matter, in order to determine their principle food source. Initial results suggest that they may feed primarily on zooplankton. This is based on the increased abundances of mono-unsaturated fatty acids and alcohols and the different ratios of the polyunsaturated fatty acids, 22:6/20:5 of the corals when compared to those of the suspended particulate organic matter. There is enrichment in L. pertusa of mono-unsaturated fatty acids...

  2. Lipids and nitrogen isotopes of deep-water corals

    Kiriakoulakis, Kostas; Fisher, Elizabeth; Wolff, George A; Freiwald, André; Grehan, Anthony J; Roberts, Murray J
    The lipid and organic nitrogen isotopic (delta15N) compositions of two common deep-water corals (Lophelia pertusa and Madrepora oculata) collected from selected locations of the NE Atlantic are compared to the composition of suspended particulate organic matter, in order to determine their principle food source. Initial results suggest that they may feed primarily on zooplankton. This is based on the increased abundances of mono-unsaturated fatty acids and alcohols and the different ratios of the polyunsaturated fatty acids, 22:6/20:5 of the corals when compared to those of the suspended particulate organic matter. There is enrichment in L. pertusa of mono-unsaturated fatty acids...

  3. Biogeochemistry of the Darwin Mounds, NE Atlantic

    Kiriakoulakis, Kostas; Bett, Brian J; White, Martin; Wolff, George A
    The Darwin Mounds are a series of small (<=5 m high, 75-100 m diameter) sandy features located in the northern Rockall Trough. They provide a habitat for communities of Lophelia pertusa and associated fauna. Suspended particulate organic matter (sPOM) reaching the deep-sea floor, which could potentially fuel this deep-water coral (DWC) ecosystem, was collected during summer 2000. This was relatively "fresh" (i.e. dominated by labile lipids such as polyunsaturated fatty acids) and was derived largely from phytoplankton remains and faecal pellets, with contributions from bacteria and microzooplankton. Labile sPOM components were enriched in the benthic boundary layer (~10 m above...

  4. Biogeochemistry of the Darwin Mounds, NE Atlantic

    Kiriakoulakis, Kostas; Bett, Brian J; White, Martin; Wolff, George A
    The Darwin Mounds are a series of small (<=5 m high, 75-100 m diameter) sandy features located in the northern Rockall Trough. They provide a habitat for communities of Lophelia pertusa and associated fauna. Suspended particulate organic matter (sPOM) reaching the deep-sea floor, which could potentially fuel this deep-water coral (DWC) ecosystem, was collected during summer 2000. This was relatively "fresh" (i.e. dominated by labile lipids such as polyunsaturated fatty acids) and was derived largely from phytoplankton remains and faecal pellets, with contributions from bacteria and microzooplankton. Labile sPOM components were enriched in the benthic boundary layer (~10 m above...

  5. Carbonate sedimentology of the Propeller Mound, Northeast Atlantic

    Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf Christian
    High resolution studies from the Propeller Mound, a cold-water coral carbonate mound in the NE Atlantic, show that this mound consists of >50% carbonate justifying the name "carbonate mound". Through the last ~300,000 years approximately one third of the carbonate has been contributed by cold-water corals, namely Lophelia pertusa and Madrepora oculata. This coral bound contribution to the carbonate budget of Propeller Mound is probably accompanied by an unknown portion of sediments buffered from suspension by the corals. However, extended hiatuses in Propeller Mound sequences only allow the calculation of a net carbonate accumulation. Thus, net carbonate accumulation for the...

  6. Carbonate sedimentology of the Propeller Mound, Northeast Atlantic

    Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf Christian
    High resolution studies from the Propeller Mound, a cold-water coral carbonate mound in the NE Atlantic, show that this mound consists of >50% carbonate justifying the name "carbonate mound". Through the last ~300,000 years approximately one third of the carbonate has been contributed by cold-water corals, namely Lophelia pertusa and Madrepora oculata. This coral bound contribution to the carbonate budget of Propeller Mound is probably accompanied by an unknown portion of sediments buffered from suspension by the corals. However, extended hiatuses in Propeller Mound sequences only allow the calculation of a net carbonate accumulation. Thus, net carbonate accumulation for the...

  7. (Table 3) Age determination of sediment core GeoB6730-1

    Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf Christian

  8. (Table 3) Age determination of sediment core GeoB6730-1

    Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf Christian

  9. (Table 3) Age determination of sediment core GeoB6730-1

    Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf Christian

  10. (Table 3) Age determination of sediment core GeoB6729-1

    Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf Christian

  11. (Table 3) Age determination of sediment core GeoB6729-1

    Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf Christian

  12. (Table 3) Age determination of sediment core GeoB6729-1

    Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf Christian

  13. (Table 3) Age determination of sediment core GeoB6728-1

    Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf Christian

  14. (Table 3) Age determination of sediment core GeoB6728-1

    Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf Christian

  15. (Table 3) Age determination of sediment core GeoB6728-1

    Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf Christian

  16. Sedimentology and stable oxygen isotope ratios of foraminifera from cores of the Porcupine Seabight, Northeast Atlantic

    Rüggeberg, Andres; Dorschel, Boris; Dullo, Wolf Christian; Hebbeln, Dierk
    Large carbonate mound structures have been discovered in the northern Porcupine Seabight (Northeast Atlantic) at depths between 600 and 1000 m. These mounds are associated with the growth of deep-sea corals Lophelia pertusa and Madrepra oculata. In this study, three sediment cores have been analysed. They are from locations close to Propeller Mound, a 150 m high ridge-like feature covered with a cold-water coral ecosystem at its upper flanks. The investigations are concentrated on grain-size analyses, carbon measurements and on the visual description of the cores and computer tomographic images, to evaluate sediment content and structure. The cores portray the depositional...

  17. Sedimentology and stable oxygen isotope ratios of foraminifera from cores of the Porcupine Seabight, Northeast Atlantic

    Rüggeberg, Andres; Dorschel, Boris; Dullo, Wolf Christian; Hebbeln, Dierk
    Large carbonate mound structures have been discovered in the northern Porcupine Seabight (Northeast Atlantic) at depths between 600 and 1000 m. These mounds are associated with the growth of deep-sea corals Lophelia pertusa and Madrepra oculata. In this study, three sediment cores have been analysed. They are from locations close to Propeller Mound, a 150 m high ridge-like feature covered with a cold-water coral ecosystem at its upper flanks. The investigations are concentrated on grain-size analyses, carbon measurements and on the visual description of the cores and computer tomographic images, to evaluate sediment content and structure. The cores portray the depositional...

  18. (Table 2) Age determination of sediment core GeoB6725-1

    Rüggeberg, Andres; Dorschel, Boris; Dullo, Wolf Christian; Hebbeln, Dierk

  19. (Table 2) Age determination of sediment core GeoB6725-1

    Rüggeberg, Andres; Dorschel, Boris; Dullo, Wolf Christian; Hebbeln, Dierk

  20. (Table 2) Age determination of sediment core GeoB6719-1

    Rüggeberg, Andres; Dorschel, Boris; Dullo, Wolf Christian; Hebbeln, Dierk

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