www.biogeosciences.net/6/2383/2009/ © Author(s) 2009. This work is distributed under the Creative Commons Attribution 3.0 License.

Abstract. First videographic indication of an Antarctic cold seep ecosystem was recently obtained from the collapsed Larsen B ice shelf, western Weddell Sea (Domack et al., 2005). Within the framework of the R/V Polarstern expe-dition ANTXXIII-8, we revisited this area for geochemical, microbiologic...

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Bibliographic Details
Main Authors: H. Niemann, D. Fischer, D. Graffe, K. Knittel, A. Montiel, O. Heilmayer, T. Pape, S. Kasten, G. Bohrmann, A. Boetius, J. Gutt
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Published: 2009
Subjects:
Antarctic
Weddell Sea
Weddell
Antarc*
Ice Shelf
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1027.2759
http://www.biogeosciences.net/6/2383/2009/bg-6-2383-2009.pdf
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Summary:Abstract. First videographic indication of an Antarctic cold seep ecosystem was recently obtained from the collapsed Larsen B ice shelf, western Weddell Sea (Domack et al., 2005). Within the framework of the R/V Polarstern expe-dition ANTXXIII-8, we revisited this area for geochemical, microbiological and further videographical examinations. During two dives with ROV Cherokee (MARUM, Bremen), several bivalve shell agglomerations of the seep-associated, chemosynthetic clam Calyptogena sp. were found in the trough of the Crane and Evans glacier. The absence of liv-ing clam specimens indicates that the flux of sulphide and hence the seepage activity is diminished at present. This im-pression was further substantiated by our geochemical obser-vations. Concentrations of thermogenic methane were mod-erately elevated with 2µM in surface sediments of a clam

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