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  • 1
    Digitale Medien
    Digitale Medien
    Harnessing microbially generated power on the seafloor (2002)
    [s.l.] : Nature Publishing Group
    Nature biotechnology 20 (2002), S. 821-825 
    Details
    ISSN: 1546-1696
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: [Auszug] In many marine environments, a voltage gradient exists across the water–sediment interface resulting from sedimentary microbial activity. Here we show that a fuel cell consisting of an anode embedded in marine sediment and a cathode in overlying seawater can use this voltage ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/nbt716
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  • 2
    Digitale Medien
    Digitale Medien
    Carbon cycle Feedbacks from the sea floor (1998)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 391 (1998), S. 536-537 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] The Earth's sedimentary rocks hold more than 107 gigatonnes of organic carbon of marine origin. Scientists see this as evidence that oxygen, produced by photosynthesis, was added to the ocean and the atmosphere in varying degrees, and at the expense of carbon dioxide, over geological ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/35262
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  • 3
    Digitale Medien
    Digitale Medien
    Activity and distribution of bacterial populations in Middle Atlantic Bight shelf sands (2003)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology ecology 44 (2003), S. 0 
    Details
    ISSN: 1574-6941
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Spatiotemporal variation and metabolic activity of the microbial community were studied in coarse-grained Middle Atlantic Bight shelf sediments in relation to pools of dissolved and particulate carbon. Algal cells were present 8–〉70 μm) fraction of the sediment held the major share (61–98%) of benthic bacteria. Bacterial and algal cell abundances, exoenzymatic activity, and [DOC] generally showed higher values in May/July 2001 than in August/December 2000. Carbohydrates and proteins were hydrolyzed at potential rates of 1–12 nmol cm−3 h−1 (β-glucosidase) and 3–70 nmol cm−3 h−1 (aminopeptidase), respectively. Fluorescence in situ hybridization analyses of the benthic microbes assigned 45–56% of DAPI-stained cells to Eubacteria and less than 2% to Eukarya. The prokaryotic community was dominated by planctomycetes and members of the Cytophaga/Flavobacterium cluster. Near the sediment surface, iodonitrotetrazolium violet reducing cells, that are considered actively respiring, amounted to 15–29% of total bacteria. Despite a low organic content (particulate organic carbon 〈0.03%) and relatively low bacterial abundances (〈109 cm−3), the Middle Atlantic Bight shelf sediments showed organic matter turnover rates that are comparable to those found in organic-rich finer-grained deposits. Our findings suggest a high biocatalytic filtration activity in these coarse permeable sediments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1574-6941.2003.tb01093.x
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  • 4
    Digitale Medien
    Digitale Medien
    Oxygen microprofiles measured in situ in deep ocean sediments (1986)
    [s.l.] : Nature Publishing Group
    Nature 320 (1986), S. 741-744 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Microelectrodes were first introduced as tools for obtaining small-scale oxygen distributions across the marine sediment-water interface in shallow waters by Revsbech et al5. When used with a separate reference electrode, these probes have a spatial resolution of 10-100 jxm, a 90% response time ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/320741a0
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  • 5
    Digitale Medien
    Digitale Medien
    Isotopic constraints on carbon exchange between deep ocean sediments and sea water (1995)
    [s.l.] : Nature Publishing Group
    Nature 373 (1995), S. 686-689 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Sediments were collected from two regions of the eastern North Pacific Ocean. Station N (35° 00' N, 123° 00' W) is located in 4,100m of water on the continental rise at the base of the Monterey deep sea fan9. Santa Monica basin (33° 45' N, 118° 45' W), a semi-enclosed, nearly anoxic ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/373686a0
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  • 6
    Digitale Medien
    Digitale Medien
    Benthic foraminiferal population fluctuations related to anoxia: Santa Barbara Basin (1991)
    Springer
    Biogeochemistry 15 (1991), S. 127-149 
    Details
    ISSN: 1573-515X
    Schlagwort(e): anoxia ; ATP ; foraminifera ; geochemistry ; organic-rich sediments ; ultrastructure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Geologie und Paläontologie
    Notizen: Abstract The pore-water geochemistry and benthic foraminiferal assemblages of sediments from two slope sites and within the central portion of the Santa Barbara Basin were characterized between February 1988 and July 1989. The highest foraminiferal numerical densities (1197 cm−3 as determined by an ATP assay) occurred at a slope site in June 1988 (550 m) in partially laminated sediments. In continuously laminated sediments from the central basin, foraminifera were found living (as determined by ATP assay) in October 1988 to depths of 4 cm, and specimens prepared for transmission electron microscopy were found with intact organelles to 3 cm, indicating their inhabitation of anoxic pore waters. Ultrastructural data from Nonionella stella is consistent with the hypothesis that this species can survive by anaerobic respiration. However, the benthic foraminifera appear unable to survive prolonged anoxia. The benthic foraminiferal population was completely dead in July 1989 when bottom water O2 was undetectable.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00003221
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  • 7
    facet.materialart.
    Unbekannt
    Seawater properties and biogeochemical parameters of bottom boundary layer samples collected aboard the R/V Oceanus during ten cruises from 2017-2019 from the Oregon shelf and slope. (2020)
    Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu
    Details
    Publikationsdatum: 2022-10-31
    Beschreibung: Dataset: 2017-2018-2019 BBL_CTD/Rosette
    Beschreibung: Seawater properties and biogeochemical parameters of bottom boundary layer samples from Oregon shelf and slope collected during ten cruises over three years. Most samples are from two repeat stations at ~30 m and 80 m water depth. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/793115
    Beschreibung: NSF Division of Ocean Sciences (NSF OCE) OCE-1634319
    Schlagwort(e): Eddy covariance ; Benthic boundary layer ; Oregon shelf ; Benthic fluxes ; Oxygen
    Repository-Name: Woods Hole Open Access Server
    Materialart: Dataset
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  • 8
    facet.materialart.
    Unbekannt
    Processed eddy covariance measurements from three lander deployments during R/V Oceanus cruises OC1802B and OC1901A along the Oregon shelf in 2018 and 2019. (2020)
    Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu
    Details
    Publikationsdatum: 2022-05-26
    Beschreibung: Dataset: Oregon Shelf Eddy Covariance Data
    Beschreibung: Processed eddy covariance measurements from benthic lander deployments on the central Oregon shelf collected during R/V Oceanus cruises OC1802B and OC1901A in 2018 and 2019. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/827116
    Beschreibung: NSF Division of Ocean Sciences (NSF OCE) OCE-1634319
    Repository-Name: Woods Hole Open Access Server
    Materialart: Dataset
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  • 9
    facet.materialart.
    Unbekannt
    Spatial and temporal patterns of organic matter accumulation on the Peru continental margin (1983)
    Plenum Press
    In:  In: Coastal upwelling, its sediment record. Part B: sedimentary records of ancient coastal upwelling. , ed. by Thiede, J. and Suess, E. NATO Conference Series IV: Marine Sciences, 10b . Plenum Press, New York, pp. 311-345.
    Details
    Publikationsdatum: 2017-04-06
    Materialart: Book chapter , NonPeerReviewed
    Format: text
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    OceanRep: Buchkapitel
  • 10
    facet.materialart.
    Unbekannt
    Harvesting Energy from the Marine Sediment−Water Interface (2001)
    American Chemistry Society
    In:  Environmental Science & Technology, 35 (1). pp. 192-195.
    Details
    Publikationsdatum: 2019-12-02
    Beschreibung: Pairs of platinum mesh or graphite fiber-based electrodes, one embedded in marine sediment (anode), the other in proximal seawater (cathode), have been used to harvest low-level power from natural, microbe established, voltage gradients at marine sediment−seawater interfaces in laboratory aquaria. The sustained power harvested thus far has been on the order of 0.01 W/m2 of electrode geometric area but is dependent on electrode design, sediment composition, and temperature. It is proposed that the sediment/anode−seawater/cathode configuration constitutes a microbial fuel cell in which power results from the net oxidation of sediment organic matter by dissolved seawater oxygen. Considering typical sediment organic carbon contents, typical fluxes of additional reduced carbon by sedimentation to sea floors 〈 1000 m deep, and the proven viability of dissolved seawater oxygen as an oxidant for power generation by seawater batteries, it is calculated that optimized power supplies based on the phenomenon demonstrated here could power oceanographic instruments deployed for routine long-term monitoring operations in the coastal ocean.
    Materialart: Article , PeerReviewed
    Format: text
    DOI: 10.1021/es001223s
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    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
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