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  • 1
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    Component parts of the World Heat Flow Data Collection
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: Area/locality; Conductivity, average; Heat flow; LATITUDE; LONGITUDE; Method comment; Number; Number of conductivity measurements; Number of temperature data; Sample, optional label/labor no; Temperature gradient
    Type: Dataset
    Format: text/tab-separated-values, 368 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
    Electronic Resource
    Electronic Resource
    Distribution and diversity of thermophilic sulfate-reducing bacteria within a Cu-Pb-Zn mine (Toyoha, Japan) (2002)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology ecology 41 (2002), S. 0 
    Details
    ISSN: 1574-6941
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The distribution and diversity of thermophilic sulfate-reducing bacteria at the Cu-Pb-Zn Toyoha underground mine, Japan, were investigated using denaturing gradient gel electrophoresis analysis based on the 16S rRNA gene, and sequence analysis of the dissimilatory sulfite reductase gene. Hydrothermal waters from different boreholes penetrating the Cu-Pb-Zn sulfide veins were collected and concentrated with a sterile filter (pore size: 0.2 μm) at sites A (64°C), B (71°C), and C (48°C). Microbial mats developed at sites A (53°C), B (66°C), and D (73°C) were harvested. The denaturing gel electrophoresis analysis showed 17 bacterial and three archaeal bands including two of spore-forming, Gram-positive sulfate-reducing bacteria, Desulfotomaculum-like 16S rDNA sequences from site B. The phylogenetic analysis of 16 clone families of dissimilatory sulfite reductase genes indicated that they are Desulfotomaculum-, Thermodesulforhabdus-like sequences, and unresolved sequences. We obtained evidence of the diversity and distribution of microbes related to thermophilic sulfate-reducing bacteria within effluent-hydrothermal groundwater and microbial mats in the thermophilic subsurface environment of the Toyoha Mine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6941.2002.tb00981.x
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Microbial diversity in hydrothermal surface to subsurface environments of Suiyo Seamount, Izu-Bonin Arc, using a catheter-type in situ growth chamber (2004)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology ecology 47 (2004), S. 0 
    Details
    ISSN: 1574-6941
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: After excavation using a portable submarine driller near deep-sea hydrothermal vents in the Suiyo Seamount, Izu-Bonin Arc, microbial diversity was examined in samples collected from inside the boreholes using an in situ growth chamber called a vent catheter. This instrument, which we devised for this study, consists of a heat-tolerant pipe tipped with a titanium mesh entrapment capsule that is packed with sterilized inorganic porous grains, which serve as an adhesion substrate. After this instrument was deployed inside each of the boreholes, as well as a natural vent, for 3–10 days in the vicinity of hot vent fluids (maxima: 156–305°C), DNA was extracted from the adhesion grains, 16S rDNA was amplified, and randomly selected clones were sequenced. In phylogenetic analysis of more than 120 clones, several novel phylotypes were detected within the ε-Proteobacteria, photosynthetic bacteria (PSB)-related α-Proteobacteria, and Euryarchaeota clusters. Members of ε-Proteobacteria were frequently encountered. Half of these were classified between two known groups, Corre's B and D. The other half of the clones were assigned to new groups, SSSV-BE1 and SSSV-BE2 (Suiyo Seamount sub-vent origin, Bacteria domain, ε-Proteobacteria, groups 1 and 2). From this hydrothermal vent field, we detected a novel lineage within the PSB cluster, SSNV-BA1 (Suiyo Seamount natural vent origin, Bacteria domain, α-Proteobacteria, group 1), which is closely related to Rhodopila globiformis isolated from a hot spring. A number of archaeal clones were also detected from the borehole samples. These clones formed a novel monophyletic clade, SSSV-AE1 (Suiyo Seamount sub-vent origin, Archaea domain, Euryarchaeota, group 1), approximately between methanogenic hyperthermophilic members of Methanococcales and environmental clone members of DHVE Group II. Thus, this hydrothermal vent environment appears to be a noteworthy microbial and genetic resource. It is also noteworthy that some of the findings presented here were made possible by the application of the in situ growth chamber into the hot fluids deep inside the boreholes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0168-6496(04)00004-2
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    Paper (German National Licenses)
    Fulltext
  • 4
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    Metabolically active microbial communities in marine sediment under high-CO2 and low-pH extremes (2013)
    Nature Publishing Group
    In:  The ISME Journal, 7 . pp. 555-567.
    Details
    Publication Date: 2019-09-23
    Description: Sediment-hosting hydrothermal systems in the Okinawa Trough maintain a large amount of liquid, supercritical and hydrate phases of CO2 in the seabed. The emission of CO2 may critically impact the geochemical, geophysical and ecological characteristics of the deep-sea sedimentary environment. So far it remains unclear whether microbial communities that have been detected in such high-CO2 and low-pH habitats are metabolically active, and if so, what the biogeochemical and ecological consequences for the environment are. In this study, RNA-based molecular approaches and radioactive tracer-based respiration rate assays were combined to study the density, diversity and metabolic activity of microbial communities in CO2-seep sediment at the Yonaguni Knoll IV hydrothermal field of the southern Okinawa Trough. In general, the number of microbes decreased sharply with increasing sediment depth and CO2 concentration. Phylogenetic analyses of community structure using reverse-transcribed 16S ribosomal RNA showed that the active microbial community became less diverse with increasing sediment depth and CO2 concentration, indicating that microbial activity and community structure are sensitive to CO2 venting. Analyses of RNA-based pyrosequences and catalyzed reporter deposition-fluorescence in situ hybridization data revealed that members of the SEEP-SRB2 group within the Deltaproteobacteria and anaerobic methanotrophic archaea (ANME-2a and -2c) were confined to the top seafloor, and active archaea were not detected in deeper sediments (13–30 cm in depth) characterized by high CO2. Measurement of the potential sulfate reduction rate at pH conditions of 3–9 with and without methane in the headspace indicated that acidophilic sulfate reduction possibly occurs in the presence of methane, even at very low pH of 3. These results suggest that some members of the anaerobic methanotrophs and sulfate reducers can adapt to the CO2-seep sedimentary environment; however, CO2 and pH in the deep-sea sediment were found to severely impact the activity and structure of the microbial community.
    Type: Article , PeerReviewed
    Format: text
    Format: other
    Format: text
    Format: text
    Format: text
    Format: text
    DOI: 10.1038/ismej.2012.124
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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