277 resultados para Hamm, Berndt
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By "D.C.A.K.", i.e. Karl Arnold Kortum.
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Publisher's advertisements: final leaf.
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Includes bibliographical references.
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With this is bound: Schlagintweit, Robert von. Die pacifischen eisenbahnen in Nordamerika; Berndt, Gustav. Der Alpenföhn in seinem einfluss auf natur- und menschenleben; Supan, Alexander. Archiv für wirthschaftsbeographie; Radde, gustav. Aus den Dagestanischen hochalpen.
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"R6-PNW-019-90."
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With this is bound Blumentritt, Ferdinand. Versuch einer ethnographie der Philippinen; Berndt, Gustav. Das Val d'Anniviers und das bassin di Sierre; Behm, E. und Wagner, H. Bericht über die fortschritte der bevölkerung; Bayberger, Franz. Der Inngletscher von Kufstein bis Haag.
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Mode of access: Internet.
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A revision and continuation of L.W.C. von Halem's Bibliographische unterhaltungen, which appeared at Bremen, 1 v. in 2 pt., 1794-95.
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Mode of access: Internet.
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Mode of access: Internet.
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Thesis (doctoral)--Konigl. Bayer. Ludwigs-Maximilians-Universitat Munchen.
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Thesis (doctoral)--Universitat Breslau.
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Thesis (doctoral)--Universitat Greifswald.
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Vol. 7-10: Siebenter [-zehnter] Theil oder [erster]- vierter Supplementband; v. 8-10 have added t.p.: Beschreibungen europaischer Dipteren, von H. Loew.
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Large amounts of the greenhouse gas methane are released from the seabed to the water column where it may be consumed by aerobic methanotrophic bacteria. This microbial filter is consequently the last marine sink for methane before its liberation to the atmosphere. The size and activity of methanotrophic communities, which determine the capacity of the water column methane filter, are thought to be mainly controlled by nutrient and redox dynamics, but little is known about the effects of ocean currents. Here, we report measurements of methanotrophic activity and biomass (CARD-FISH) at methane seeps west of Svalbard, and related them to physical water mass properties (CTD) and modelled current dynamics. We show that cold bottom water containing a large number of aerobic methanotrophs was rapidly displaced by warmer water with a considerably smaller methanotrophic community. This water mass exchange, caused by short-term variations of the West Spitsbergen Current, constitutes a rapid oceanographic switch severely reducing methanotrophic activity in the water column. Strong and fluctuating currents are widespread oceanographic features common at many methane seep systems and are thus likely to globally affect methane oxidation in the ocean water column.