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Datasets of project "Hotspot Ecosystem Research and Mans Impact On European Seas"

Mostrando recursos 1 - 20 de 1.188

  1. Biogeochemical investigation of cold seep sediments in the Eastern Mediterranean Sea

    Pop Ristova, Petra; Wenzhöfer, Frank; Ramette, Alban; Felden, Janine; Boetius, Antje
    Cold seep ecosystems are highly productive, fragmented ecosystems of the deep-sea floor. They form worldwide where methane reaches the surface seafloor, and are characterized by rich chemosynthetic communities fueled by the microbial utilization of hydrocarbons. Here we investigated with in situ (benthic chamber, microprofiler) and ex situ (pore water constituents, turnover rates of sulfate and methane, prokaryote abundance) techniques reduced sites from three different seep ecosystems in the Eastern Mediterranean deep-sea. At all three cold seep systems, the Amon Mud Volcano, Amsterdam Mud Volcano and the Nile Deep Sea Fan Pockmark area, we observed and sampled patches of highly reduced,...

  2. Biogeochemical investigation of cold seep sediments in the Eastern Mediterranean Sea

    Pop Ristova, Petra; Wenzhöfer, Frank; Ramette, Alban; Felden, Janine; Boetius, Antje
    Cold seep ecosystems are highly productive, fragmented ecosystems of the deep-sea floor. They form worldwide where methane reaches the surface seafloor, and are characterized by rich chemosynthetic communities fueled by the microbial utilization of hydrocarbons. Here we investigated with in situ (benthic chamber, microprofiler) and ex situ (pore water constituents, turnover rates of sulfate and methane, prokaryote abundance) techniques reduced sites from three different seep ecosystems in the Eastern Mediterranean deep-sea. At all three cold seep systems, the Amon Mud Volcano, Amsterdam Mud Volcano and the Nile Deep Sea Fan Pockmark area, we observed and sampled patches of highly reduced,...

  3. Biogeochemical investigation of cold seep sediments in the Eastern Mediterranean Sea

    Pop Ristova, Petra; Wenzhöfer, Frank; Ramette, Alban; Felden, Janine; Boetius, Antje
    Cold seep ecosystems are highly productive, fragmented ecosystems of the deep-sea floor. They form worldwide where methane reaches the surface seafloor, and are characterized by rich chemosynthetic communities fueled by the microbial utilization of hydrocarbons. Here we investigated with in situ (benthic chamber, microprofiler) and ex situ (pore water constituents, turnover rates of sulfate and methane, prokaryote abundance) techniques reduced sites from three different seep ecosystems in the Eastern Mediterranean deep-sea. At all three cold seep systems, the Amon Mud Volcano, Amsterdam Mud Volcano and the Nile Deep Sea Fan Pockmark area, we observed and sampled patches of highly reduced,...

  4. Meiofauna and nematodes in cold seep surface sediments collected during Maria S. Merian cruise MSM13 to the Eastern Mediterranean area

    de Groote, Annelies; Vanreusel, Ann
    In this study the importance of spatial scales on nematode species distribution and patterns of biodiversity and turnover in cold seeps was investigated. Therefore it was identified how nematode assemblages differ in densities and composition at different spatial scales within and between three geographically separated cold seeps, the Central pockmark area, the Amon and the Amsterdam, all located in the Eastern Mediterranean area. The replicated sampling of several reduced habitats at each seep allowed to elucidate the most important scale of turnover. The spatial scales included here range within habitat (centimeters, micro-scale), within a cold seep (10s to 100's of...

  5. Meiofauna and nematodes in cold seep surface sediments collected during Maria S. Merian cruise MSM13 to the Eastern Mediterranean area

    de Groote, Annelies; Vanreusel, Ann
    In this study the importance of spatial scales on nematode species distribution and patterns of biodiversity and turnover in cold seeps was investigated. Therefore it was identified how nematode assemblages differ in densities and composition at different spatial scales within and between three geographically separated cold seeps, the Central pockmark area, the Amon and the Amsterdam, all located in the Eastern Mediterranean area. The replicated sampling of several reduced habitats at each seep allowed to elucidate the most important scale of turnover. The spatial scales included here range within habitat (centimeters, micro-scale), within a cold seep (10s to 100's of...

  6. Meiofauna and nematodes in cold seep surface sediments collected during Maria S. Merian cruise MSM13/4

    de Groote, Annelies; Vanreusel, Ann

  7. Meiofauna and nematodes in cold seep surface sediments collected during Maria S. Merian cruise MSM13/4

    de Groote, Annelies; Vanreusel, Ann

  8. Meiofauna and nematodes in cold seep surface sediments collected during Maria S. Merian cruise MSM13/3

    de Groote, Annelies; Vanreusel, Ann

  9. Meiofauna and nematodes in cold seep surface sediments collected during Maria S. Merian cruise MSM13/3

    de Groote, Annelies; Vanreusel, Ann

  10. Methane fluxes and carbonate deposits at eastern Mediterranean cold seeps

    Römer, Miriam; Sahling, Heiko; Pape, Thomas; dos Santos Ferreira, Christian; Wenzhöfer, Frank; Boetius, Antje; Bohrmann, Gerhard
    High acoustic seafloor-backscatter signals characterize hundreds of patches of methane-derived authigenic carbonates and chemosynthetic communities associated with hydrocarbon seepage on the Nile Deep Sea Fan (NDSF) in the Eastern Mediterranean Sea. During a high-resolution ship-based multibeam survey covering a ~ 225 km**2 large seafloor area in the Central Province of the NDSF we identified 163 high-backscatter patches at water depths between 1500 and 1800 m, and investigated the source, composition, turnover, flux and fate of emitted hydrocarbons. Systematic Parasound single beam echosounder surveys of the water column showed hydroacoustic anomalies (flares), indicative of gas bubble streams, above 8% of the...

  11. Methane fluxes and carbonate deposits at eastern Mediterranean cold seeps

    Römer, Miriam; Sahling, Heiko; Pape, Thomas; dos Santos Ferreira, Christian; Wenzhöfer, Frank; Boetius, Antje; Bohrmann, Gerhard
    High acoustic seafloor-backscatter signals characterize hundreds of patches of methane-derived authigenic carbonates and chemosynthetic communities associated with hydrocarbon seepage on the Nile Deep Sea Fan (NDSF) in the Eastern Mediterranean Sea. During a high-resolution ship-based multibeam survey covering a ~ 225 km**2 large seafloor area in the Central Province of the NDSF we identified 163 high-backscatter patches at water depths between 1500 and 1800 m, and investigated the source, composition, turnover, flux and fate of emitted hydrocarbons. Systematic Parasound single beam echosounder surveys of the water column showed hydroacoustic anomalies (flares), indicative of gas bubble streams, above 8% of the...

  12. Methane fluxes and carbonate deposits at eastern Mediterranean cold seeps

    Römer, Miriam; Sahling, Heiko; Pape, Thomas; dos Santos Ferreira, Christian; Wenzhöfer, Frank; Boetius, Antje; Bohrmann, Gerhard
    High acoustic seafloor-backscatter signals characterize hundreds of patches of methane-derived authigenic carbonates and chemosynthetic communities associated with hydrocarbon seepage on the Nile Deep Sea Fan (NDSF) in the Eastern Mediterranean Sea. During a high-resolution ship-based multibeam survey covering a ~ 225 km**2 large seafloor area in the Central Province of the NDSF we identified 163 high-backscatter patches at water depths between 1500 and 1800 m, and investigated the source, composition, turnover, flux and fate of emitted hydrocarbons. Systematic Parasound single beam echosounder surveys of the water column showed hydroacoustic anomalies (flares), indicative of gas bubble streams, above 8% of the...

  13. (Appendix) Visually determined major and minor diameters of gas bubbles emanating from five sites at the high-backscatter patch C-1

    Römer, Miriam; Sahling, Heiko; Pape, Thomas; dos Santos Ferreira, Christian; Wenzhöfer, Frank; Boetius, Antje; Bohrmann, Gerhard

  14. (Appendix) Visually determined major and minor diameters of gas bubbles emanating from five sites at the high-backscatter patch C-1

    Römer, Miriam; Sahling, Heiko; Pape, Thomas; dos Santos Ferreira, Christian; Wenzhöfer, Frank; Boetius, Antje; Bohrmann, Gerhard

  15. (Appendix) Visually determined major and minor diameters of gas bubbles emanating from five sites at the high-backscatter patch C-1

    Römer, Miriam; Sahling, Heiko; Pape, Thomas; dos Santos Ferreira, Christian; Wenzhöfer, Frank; Boetius, Antje; Bohrmann, Gerhard

  16. (Table 3) Gas flux estimation for gas bubble streams at C-1

    Römer, Miriam; Sahling, Heiko; Pape, Thomas; dos Santos Ferreira, Christian; Wenzhöfer, Frank; Boetius, Antje; Bohrmann, Gerhard

  17. (Table 3) Gas flux estimation for gas bubble streams at C-1

    Römer, Miriam; Sahling, Heiko; Pape, Thomas; dos Santos Ferreira, Christian; Wenzhöfer, Frank; Boetius, Antje; Bohrmann, Gerhard

  18. (Table 3) Gas flux estimation for gas bubble streams at C-1

    Römer, Miriam; Sahling, Heiko; Pape, Thomas; dos Santos Ferreira, Christian; Wenzhöfer, Frank; Boetius, Antje; Bohrmann, Gerhard

  19. (Table 1) Diffusive methane effluxes and AOM turnover rates at C-9

    Boetius, Antje; Wenzhöfer, Frank

  20. (Table 1) Diffusive methane effluxes and AOM turnover rates at C-9

    Boetius, Antje; Wenzhöfer, Frank

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