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  • 1
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    Evidence for Low‐Temperature Diffuse Venting at North Pond, Western Flank of the Mid‐Atlantic Ridge (2019)
    Wiley
    Details
    Publication Date: 2019
    Description: Abstract During expedition MSM37 on the German RV Maria S. Merian, bottom water temperature and sediment temperature profiles were measured in the vicinity of North Pond (western flank of Mid‐Atlantic Ridge) during exploratory dives with Remotely Operated Vehicle Jason II. In addition, push cores were taken at locations with high sediment temperature gradients. We could identify two locations where sediment temperature gradients exceed 1 K/m and bottom water temperatures showed an anomaly of up to 0.04 °C above background. We interpret these observations as clear indication of low‐temperature diffuse venting of fluids that have traveled through the uppermost crust. We can safely assume that the observed phenomena are widespread at ridge flank settings where sediment cover is thin or absent, and hence, we can explain the efficient heat mining on ridge flanks. Due to the difficulties of locating diffuse low‐temperature discharge sites and due to the fact that discharge can occur through thin sediment cover as well as through sediment‐free basement outcrops, it will be very difficult to quantify fluxes of energy and mass from low‐temperature diffuse venting in ridge flank settings; however, thermal anomalies may be used to locate sites of discharge for geochemical, microbial, and hydrologic characterization.
    Electronic ISSN: 1525-2027
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 2
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    Abundance and diversity of microbial life in ocean crust (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-05-30
    Description: Oceanic lithosphere exposed at the sea floor undergoes seawater-rock alteration reactions involving the oxidation and hydration of glassy basalt. Basalt alteration reactions are theoretically capable of supplying sufficient energy for chemolithoautotrophic growth. Such reactions have been shown to generate microbial biomass in the laboratory, but field-based support for the existence of microbes that are supported by basalt alteration is lacking. Here, using quantitative polymerase chain reaction, in situ hybridization and microscopy, we demonstrate that prokaryotic cell abundances on seafloor-exposed basalts are 3-4 orders of magnitude greater than in overlying deep sea water. Phylogenetic analyses of basaltic lavas from the East Pacific Rise (9 degrees N) and around Hawaii reveal that the basalt-hosted biosphere harbours high bacterial community richness and that community membership is shared between these sites. We hypothesize that alteration reactions fuel chemolithoautotrophic microorganisms, which constitute a trophic base of the basalt habitat, with important implications for deep-sea carbon cycling and chemical exchange between basalt and sea water.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Santelli, Cara M -- Orcutt, Beth N -- Banning, Erin -- Bach, Wolfgang -- Moyer, Craig L -- Sogin, Mitchell L -- Staudigel, Hubert -- Edwards, Katrina J -- England -- Nature. 2008 May 29;453(7195):653-6. doi: 10.1038/nature06899.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MIT/WHOI Joint Program in Oceanography and Ocean Engineering, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18509444" target="_blank"〉PubMed〈/a〉
    Keywords: *Biodiversity ; Chemoautotrophic Growth ; Genes, Bacterial/genetics ; Geologic Sediments/*microbiology ; Hawaii ; History, Ancient ; *Marine Biology ; Molecular Sequence Data ; Pacific Ocean ; Phylogeny ; Polymerase Chain Reaction ; RNA, Ribosomal, 16S/genetics ; Seawater/microbiology ; *Silicates/metabolism ; Water Microbiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 3
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    Hydrogen is an energy source for hydrothermal vent symbioses (2011)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2011-08-13
    Description: The discovery of deep-sea hydrothermal vents in 1977 revolutionized our understanding of the energy sources that fuel primary productivity on Earth. Hydrothermal vent ecosystems are dominated by animals that live in symbiosis with chemosynthetic bacteria. So far, only two energy sources have been shown to power chemosynthetic symbioses: reduced sulphur compounds and methane. Using metagenome sequencing, single-gene fluorescence in situ hybridization, immunohistochemistry, shipboard incubations and in situ mass spectrometry, we show here that the symbionts of the hydrothermal vent mussel Bathymodiolus from the Mid-Atlantic Ridge use hydrogen to power primary production. In addition, we show that the symbionts of Bathymodiolus mussels from Pacific vents have hupL, the key gene for hydrogen oxidation. Furthermore, the symbionts of other vent animals such as the tubeworm Riftia pachyptila and the shrimp Rimicaris exoculata also have hupL. We propose that the ability to use hydrogen as an energy source is widespread in hydrothermal vent symbioses, particularly at sites where hydrogen is abundant.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Petersen, Jillian M -- Zielinski, Frank U -- Pape, Thomas -- Seifert, Richard -- Moraru, Cristina -- Amann, Rudolf -- Hourdez, Stephane -- Girguis, Peter R -- Wankel, Scott D -- Barbe, Valerie -- Pelletier, Eric -- Fink, Dennis -- Borowski, Christian -- Bach, Wolfgang -- Dubilier, Nicole -- England -- Nature. 2011 Aug 10;476(7359):176-80. doi: 10.1038/nature10325.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, 28359 Bremen, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21833083" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Atlantic Ocean ; Bivalvia/drug effects/metabolism/*microbiology ; Dose-Response Relationship, Drug ; *Ecosystem ; *Energy Metabolism ; Geologic Sediments/chemistry ; Gills/drug effects/metabolism/microbiology ; Hot Springs/*chemistry/microbiology ; Hydrogen/analysis/*metabolism/pharmacology ; Hydrogenase/genetics/metabolism ; Molecular Sequence Data ; Oxidation-Reduction ; Partial Pressure ; Seawater/chemistry/microbiology ; Sulfides/metabolism ; Sulfur/metabolism ; Symbiosis/drug effects/genetics/*physiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 4
    Electronic Resource
    Electronic Resource
    The carbon dioxide problem. An interdisciplinary survey (1980)
    Springer
    Cellular and molecular life sciences 36 (1980), S. 767-767 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01978574
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  • 5
    Electronic Resource
    Electronic Resource
    The climate convention burden sharing, targets, and reduction commitments (1995)
    Springer
    Naturwissenschaften 82 (1995), S. 83-86 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01140146
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  • 6
    Electronic Resource
    Electronic Resource
    The Climate Convention Burden Sharing, Targets, and Reduction Commitments (1995)
    Springer
    Naturwissenschaften 82 (1995), S. 83-86 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01140146
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  • 7
    Electronic Resource
    Electronic Resource
    Negotiating CO2 Emission Quotas for Climate Protection (1997)
    Springer
    Naturwissenschaften 84 (1997), S. 268-274 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001140050395
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  • 8
    Electronic Resource
    Electronic Resource
    Surface spectroscopy and photochemistry of adsorbed molecules
    Amsterdam : Elsevier
    Journal of Photochemistry 5 (1976), S. 186-187 
    Details
    ISSN: 0047-2670
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0047-2670(76)80062-7
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  • 9
    Electronic Resource
    Electronic Resource
    GCM-derived climatic change scenarios due to a CO2-doubling applied for the Mediterranean area (1985)
    Springer
    Meteorology and atmospheric physics 35 (1985), S. 323-339 
    Details
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Zur Abschätzung einer möglichen Klimaänderung als Folge einer Verdopplung der CO2-Konzentration in der Atmosphäre dienen die Ergebnisse von Studien mit drei-dimensionalen Modellen der atmosphärischen Zirkulation. Diese Ergebnisse können nicht als Klimavorhersagen betrachtet werden, da die gegenwärtigen Modelle noch erhebliche Mängel aufweisen. Sie bilden jedoch die Grundlage zur Entwicklung von Klimaszenarien. Klimamodelle sind gegenwärtig die einzigen Hilfsmittel, um die Reaktion des Klimasystems auf eine externe Störung in physikalisch konsistenter Weise und in hoher zeitlicher und räumlicher Auflösung zu simulieren. Für den Mittelmeerraum werden die Ergebnisse dreier verschiedener Klimamodelle (British Meteorological Office (BMO); Goddard Institute for Space Studies (GISS); National Center for Atmospheric Research (NCAR)) anhand der regionalen und saisonalen Verteilungen von Temperatur, Niederschlag und Bodenfeuchte vorgestellt. Die durch einen CO2-Anstieg verursachte Änderung der Temperaturverteilung ist bei den drei Modellergebnissen ähnlich. Die räumlichen Mittelwerte liegen zwischen 2,5 und 4,0 K. Der Vergleich der Verteilung hydrologischer Größen ergibt dagegen kein einheitliches Bild. Die den simulierten Klimaänderungen zugrunde liegenden physikalischen Mechanismen werden benannt und die statistische Signifikanz der Klimaänderung wird getestet. Diese Arbeit dient zur Entwicklung einer Methodologie für den Einsatz von Klimamodellszenarien bei der Impaktanalyse.
    Notes: Summary For the estimation of a potential climatic change induced by a doubling of atmospheric CO2 we use the results of three-dimensional general circulation models (GCM). Although the results from present climate modeling cannot be considered as predictions of future climatic conditions due to the inherent models' deficiencies, they can still serve a useful purpose in climate change scenarios. The reason for this is that climate models are the only tools available to study the response of the climate system to a perturbation in a physically consistent manner and that such types of models can provide a consistent data set of high temporal and spatial resolution. For the Mediterranean area, the results obtained from three different GCMs, namely, the British Meteorological Office model (BMO), the Goddard Institute for Space Studies model (GISS), and the National Center for Atmospheric Research model (NCAR) are shown. The regional and seasonal distributions of temperature, precipitation, and soil moisture are used to study the potential changes. The results indicate that the CO2-induced changes for temperature generated by the three models are of similar magnitude. The values of the area mean change range between 2.5 and 4.0 K. The precipitation response results in a diverse pattern. The physical mechanism likely to be responsible for the simulated climatic changes are identified and their statistical significance is tested. This type of work will help us develop the methodology and assist us in gaining insight into the use of climate model scenarios for impact analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02334488
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  • 10
    Electronic Resource
    Electronic Resource
    Forest dieback: Extent of damages and control strategies (1985)
    Springer
    Cellular and molecular life sciences 41 (1985), S. 1095-1104 
    Details
    ISSN: 1420-9071
    Keywords: Forest dieback ; Waldsterben ; damage inventory ; efficient energy use ; abatement techniques ; pollution source substitution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary This paper starts from the generally accepted premise that forest dieback is a complex phenomenon caused by multiple stresses that are exerted by a host of contributing factors. It is argued that the rapidly proceeding forest dieback, as documented in the damage inventories, is in itself enough reason to warrant action. Therefore, at this late stage, this paper emphasizes the pressing need to introduce active control measures which will reduce pollution emission through more efficient use of fossil fuels, through abatement techniques at the source, and through substitution with less polluting sources.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01951686
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