Novel microbial communities of the Haakon Mosby mud volcano and their role as a methane sink
Mud volcanism is an important natural source of the greenhouse gas methane to the hydrosphere and atmosphere1,2. Recent investigations show that the number of active submarine mud volcanoes might be much higher than anticipated (for example, see refs 3–5), and that gas emitted from deep-sea seeps mi...
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ftpubman:oai:pure.mpg.de:item_2485580 2024-09-15T17:57:57+00:00 Novel microbial communities of the Haakon Mosby mud volcano and their role as a methane sink Niemann, H. Lösekann, T. de Beer, D. Elvert, M. Nadalig, T. Knittel, K. Amann, R. Sauter, E. Schluter, M. Klages, M. Foucher, J. Boetius, A. 2006-10-19 application/pdf http://hdl.handle.net/21.11116/0000-0001-CF0A-C http://hdl.handle.net/21.11116/0000-0007-8841-6 eng eng http://hdl.handle.net/21.11116/0000-0001-CF0A-C http://hdl.handle.net/21.11116/0000-0007-8841-6 Nature info:eu-repo/semantics/article 2006 ftpubman 2024-07-31T09:31:27Z Mud volcanism is an important natural source of the greenhouse gas methane to the hydrosphere and atmosphere1,2. Recent investigations show that the number of active submarine mud volcanoes might be much higher than anticipated (for example, see refs 3–5), and that gas emitted from deep-sea seeps might reach the upper mixed ocean6,7,8. Unfortunately, global methane emission from active submarine mud volcanoes cannot be quantified because their number and gas release are unknown9. It is also unclear how efficiently methane-oxidizing microorganisms remove methane. Here we investigate the methane-emitting Haakon Mosby Mud Volcano (HMMV, Barents Sea, 72° N, 14° 44′ E; 1,250 m water depth) to provide quantitative estimates of the in situ composition, distribution and activity of methanotrophs in relation to gas emission. The HMMV hosts three key communities: aerobic methanotrophic bacteria (Methylococcales), anaerobic methanotrophic archaea (ANME-2) thriving below siboglinid tubeworms, and a previously undescribed clade of archaea (ANME-3) associated with bacterial mats. We found that the upward flow of sulphate- and oxygen-free mud volcano fluids restricts the availability of these electron acceptors for methane oxidation, and hence the habitat range of methanotrophs. This mechanism limits the capacity of the microbial methane filter at active marine mud volcanoes to <40% of the total flux. Article in Journal/Newspaper Barents Sea Max Planck Society: MPG.PuRe |
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Open Polar |
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Max Planck Society: MPG.PuRe |
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ftpubman |
language |
English |
description |
Mud volcanism is an important natural source of the greenhouse gas methane to the hydrosphere and atmosphere1,2. Recent investigations show that the number of active submarine mud volcanoes might be much higher than anticipated (for example, see refs 3–5), and that gas emitted from deep-sea seeps might reach the upper mixed ocean6,7,8. Unfortunately, global methane emission from active submarine mud volcanoes cannot be quantified because their number and gas release are unknown9. It is also unclear how efficiently methane-oxidizing microorganisms remove methane. Here we investigate the methane-emitting Haakon Mosby Mud Volcano (HMMV, Barents Sea, 72° N, 14° 44′ E; 1,250 m water depth) to provide quantitative estimates of the in situ composition, distribution and activity of methanotrophs in relation to gas emission. The HMMV hosts three key communities: aerobic methanotrophic bacteria (Methylococcales), anaerobic methanotrophic archaea (ANME-2) thriving below siboglinid tubeworms, and a previously undescribed clade of archaea (ANME-3) associated with bacterial mats. We found that the upward flow of sulphate- and oxygen-free mud volcano fluids restricts the availability of these electron acceptors for methane oxidation, and hence the habitat range of methanotrophs. This mechanism limits the capacity of the microbial methane filter at active marine mud volcanoes to <40% of the total flux. |
format |
Article in Journal/Newspaper |
author |
Niemann, H. Lösekann, T. de Beer, D. Elvert, M. Nadalig, T. Knittel, K. Amann, R. Sauter, E. Schluter, M. Klages, M. Foucher, J. Boetius, A. |
spellingShingle |
Niemann, H. Lösekann, T. de Beer, D. Elvert, M. Nadalig, T. Knittel, K. Amann, R. Sauter, E. Schluter, M. Klages, M. Foucher, J. Boetius, A. Novel microbial communities of the Haakon Mosby mud volcano and their role as a methane sink |
author_facet |
Niemann, H. Lösekann, T. de Beer, D. Elvert, M. Nadalig, T. Knittel, K. Amann, R. Sauter, E. Schluter, M. Klages, M. Foucher, J. Boetius, A. |
author_sort |
Niemann, H. |
title |
Novel microbial communities of the Haakon Mosby mud volcano and their role as a methane sink |
title_short |
Novel microbial communities of the Haakon Mosby mud volcano and their role as a methane sink |
title_full |
Novel microbial communities of the Haakon Mosby mud volcano and their role as a methane sink |
title_fullStr |
Novel microbial communities of the Haakon Mosby mud volcano and their role as a methane sink |
title_full_unstemmed |
Novel microbial communities of the Haakon Mosby mud volcano and their role as a methane sink |
title_sort |
novel microbial communities of the haakon mosby mud volcano and their role as a methane sink |
publishDate |
2006 |
url |
http://hdl.handle.net/21.11116/0000-0001-CF0A-C http://hdl.handle.net/21.11116/0000-0007-8841-6 |
genre |
Barents Sea |
genre_facet |
Barents Sea |
op_source |
Nature |
op_relation |
http://hdl.handle.net/21.11116/0000-0001-CF0A-C http://hdl.handle.net/21.11116/0000-0007-8841-6 |
_version_ |
1810434174518034432 |