Anaerobic oxidation of methane and sulphate reduction rates, hydrocarbons, sulphate and sulphide concentrations of sediment cores from the Larsen B embayment at the eastern site of the Antarctic Peninsula
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 expedition ANTXXIII-8, we revisited this area for geochemical, microbiological and furt...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.745450 2023-05-15T13:42:10+02:00 Anaerobic oxidation of methane and sulphate reduction rates, hydrocarbons, sulphate and sulphide concentrations of sediment cores from the Larsen B embayment at the eastern site of the Antarctic Peninsula Niemann, Helge Fischer, David Graffe, Dorothea Knittel, Katrin Montiel, Américo Heilmayer, Olaf Nöthen, Kerstin Pape, Thomas Kasten, Sabine Bohrmann, Gerhard Boetius, Antje Gutt, Julian MEDIAN LATITUDE: -65.532570 * MEDIAN LONGITUDE: -61.226070 * SOUTH-BOUND LATITUDE: -65.908800 * WEST-BOUND LONGITUDE: -61.471400 * NORTH-BOUND LATITUDE: -65.435000 * EAST-BOUND LONGITUDE: -60.352700 * DATE/TIME START: 2007-01-12T16:23:00 * DATE/TIME END: 2007-01-17T13:42:00 2009-09-22 application/zip, 10 datasets https://doi.pangaea.de/10.1594/PANGAEA.745450 https://doi.org/10.1594/PANGAEA.745450 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.745450 https://doi.org/10.1594/PANGAEA.745450 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Niemann, Helge; Fischer, David; Graffe, Dorothea; Knittel, Katrin; Montiel, Américo; Heilmayer, Olaf; Nöthen, Kerstin; Pape, Thomas; Kasten, Sabine; Bohrmann, Gerhard; Boetius, Antje; Gutt, Julian (2009): Biogeochemistry of a low-activity cold seep in the Larsen B area, western Weddell Sea, Antarctica. Biogeosciences, 6, 2383-2395, https://doi.org/10.5194/bg-6-2383-2009 ANT-XXIII/8 CAML Census of Antarctic Marine Life Center for Marine Environmental Sciences GC Gravity corer MARUM MUC MultiCorer Polarstern PS69 PS69/702-6 PS69/706-4 PS69/709-3 PS69/711-4 PS69/711-5 Weddell Sea Larsen-B Dataset 2009 ftpangaea https://doi.org/10.1594/PANGAEA.745450 https://doi.org/10.5194/bg-6-2383-2009 2023-01-20T07:31:54Z 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 expedition 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 living clam specimens indicates that the flux of sulphide and hence the seepage activity is diminished at present. This impression was further substantiated by our geochemical observations. Concentrations of thermogenic methane were moderately elevated with 2 µM in surface sediments of a clam patch, increasing up to 9 µM at a sediment depth of about 1 m in the bottom sections of the sediment cores. This correlated with a moderate decrease in sulphate from about 28 mM at the surface down to 23.4 mM, an increase in sulphide to up to 1.43 mM and elevated rates of the anaerobic oxidation of methane (AOM) of up to 600 pmol cm**-3 d**-1 at about 1 m below the seafloor. Molecular analyses indicate that methanotrophic archaea related to ANME-3 are the most likely candidates mediating AOM in sediments of the Larsen B seep. Dataset Antarc* Antarctic Antarctic Peninsula Ice Shelf Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Antarctic Peninsula The Antarctic Weddell Weddell Sea ENVELOPE(-61.471400,-60.352700,-65.435000,-65.908800) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-XXIII/8 CAML Census of Antarctic Marine Life Center for Marine Environmental Sciences GC Gravity corer MARUM MUC MultiCorer Polarstern PS69 PS69/702-6 PS69/706-4 PS69/709-3 PS69/711-4 PS69/711-5 Weddell Sea Larsen-B |
spellingShingle |
ANT-XXIII/8 CAML Census of Antarctic Marine Life Center for Marine Environmental Sciences GC Gravity corer MARUM MUC MultiCorer Polarstern PS69 PS69/702-6 PS69/706-4 PS69/709-3 PS69/711-4 PS69/711-5 Weddell Sea Larsen-B Niemann, Helge Fischer, David Graffe, Dorothea Knittel, Katrin Montiel, Américo Heilmayer, Olaf Nöthen, Kerstin Pape, Thomas Kasten, Sabine Bohrmann, Gerhard Boetius, Antje Gutt, Julian Anaerobic oxidation of methane and sulphate reduction rates, hydrocarbons, sulphate and sulphide concentrations of sediment cores from the Larsen B embayment at the eastern site of the Antarctic Peninsula |
topic_facet |
ANT-XXIII/8 CAML Census of Antarctic Marine Life Center for Marine Environmental Sciences GC Gravity corer MARUM MUC MultiCorer Polarstern PS69 PS69/702-6 PS69/706-4 PS69/709-3 PS69/711-4 PS69/711-5 Weddell Sea Larsen-B |
description |
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 expedition 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 living clam specimens indicates that the flux of sulphide and hence the seepage activity is diminished at present. This impression was further substantiated by our geochemical observations. Concentrations of thermogenic methane were moderately elevated with 2 µM in surface sediments of a clam patch, increasing up to 9 µM at a sediment depth of about 1 m in the bottom sections of the sediment cores. This correlated with a moderate decrease in sulphate from about 28 mM at the surface down to 23.4 mM, an increase in sulphide to up to 1.43 mM and elevated rates of the anaerobic oxidation of methane (AOM) of up to 600 pmol cm**-3 d**-1 at about 1 m below the seafloor. Molecular analyses indicate that methanotrophic archaea related to ANME-3 are the most likely candidates mediating AOM in sediments of the Larsen B seep. |
format |
Dataset |
author |
Niemann, Helge Fischer, David Graffe, Dorothea Knittel, Katrin Montiel, Américo Heilmayer, Olaf Nöthen, Kerstin Pape, Thomas Kasten, Sabine Bohrmann, Gerhard Boetius, Antje Gutt, Julian |
author_facet |
Niemann, Helge Fischer, David Graffe, Dorothea Knittel, Katrin Montiel, Américo Heilmayer, Olaf Nöthen, Kerstin Pape, Thomas Kasten, Sabine Bohrmann, Gerhard Boetius, Antje Gutt, Julian |
author_sort |
Niemann, Helge |
title |
Anaerobic oxidation of methane and sulphate reduction rates, hydrocarbons, sulphate and sulphide concentrations of sediment cores from the Larsen B embayment at the eastern site of the Antarctic Peninsula |
title_short |
Anaerobic oxidation of methane and sulphate reduction rates, hydrocarbons, sulphate and sulphide concentrations of sediment cores from the Larsen B embayment at the eastern site of the Antarctic Peninsula |
title_full |
Anaerobic oxidation of methane and sulphate reduction rates, hydrocarbons, sulphate and sulphide concentrations of sediment cores from the Larsen B embayment at the eastern site of the Antarctic Peninsula |
title_fullStr |
Anaerobic oxidation of methane and sulphate reduction rates, hydrocarbons, sulphate and sulphide concentrations of sediment cores from the Larsen B embayment at the eastern site of the Antarctic Peninsula |
title_full_unstemmed |
Anaerobic oxidation of methane and sulphate reduction rates, hydrocarbons, sulphate and sulphide concentrations of sediment cores from the Larsen B embayment at the eastern site of the Antarctic Peninsula |
title_sort |
anaerobic oxidation of methane and sulphate reduction rates, hydrocarbons, sulphate and sulphide concentrations of sediment cores from the larsen b embayment at the eastern site of the antarctic peninsula |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.745450 https://doi.org/10.1594/PANGAEA.745450 |
op_coverage |
MEDIAN LATITUDE: -65.532570 * MEDIAN LONGITUDE: -61.226070 * SOUTH-BOUND LATITUDE: -65.908800 * WEST-BOUND LONGITUDE: -61.471400 * NORTH-BOUND LATITUDE: -65.435000 * EAST-BOUND LONGITUDE: -60.352700 * DATE/TIME START: 2007-01-12T16:23:00 * DATE/TIME END: 2007-01-17T13:42:00 |
long_lat |
ENVELOPE(-61.471400,-60.352700,-65.435000,-65.908800) |
geographic |
Antarctic Antarctic Peninsula The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Shelf Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Shelf Weddell Sea |
op_source |
Supplement to: Niemann, Helge; Fischer, David; Graffe, Dorothea; Knittel, Katrin; Montiel, Américo; Heilmayer, Olaf; Nöthen, Kerstin; Pape, Thomas; Kasten, Sabine; Bohrmann, Gerhard; Boetius, Antje; Gutt, Julian (2009): Biogeochemistry of a low-activity cold seep in the Larsen B area, western Weddell Sea, Antarctica. Biogeosciences, 6, 2383-2395, https://doi.org/10.5194/bg-6-2383-2009 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.745450 https://doi.org/10.1594/PANGAEA.745450 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.745450 https://doi.org/10.5194/bg-6-2383-2009 |
_version_ |
1766163854924972032 |