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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
2015
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.844013 |
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| _version_ | 1867170467943546880 |
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| author | Steinle, Lea Graves, Carolyn Treude, Tina Ferre, Benedicte Biastoch, Arne Bussmann, Ingeborg Berndt, Christian Krastel, Sebastian James, Rachael H Behrens, Erik Böning, Claus W Greinert, Jens Sapart, Célia-Julia Scheinert, Markus Sommer, Stefan Lehmann, Moritz F Niemann, Helge |
| author_facet | Steinle, Lea Graves, Carolyn Treude, Tina Ferre, Benedicte Biastoch, Arne Bussmann, Ingeborg Berndt, Christian Krastel, Sebastian James, Rachael H Behrens, Erik Böning, Claus W Greinert, Jens Sapart, Célia-Julia Scheinert, Markus Sommer, Stefan Lehmann, Moritz F Niemann, Helge |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_844013 |
| institution | PANGAEA |
| language | en |
| publishDate | 2015 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Temperature, salinity, methane concentration, oxidation rates and methanotrophic cell number at Svalbard seeps in summer 2011 and 2012 (cruises POS419 and MSM21/4) Steinle, Lea Graves, Carolyn Treude, Tina Ferre, Benedicte Biastoch, Arne Bussmann, Ingeborg Berndt, Christian Krastel, Sebastian James, Rachael H Behrens, Erik Böning, Claus W Greinert, Jens Sapart, Célia-Julia Scheinert, Markus Sommer, Stefan Lehmann, Moritz F Niemann, Helge 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. |
| title | Temperature, salinity, methane concentration, oxidation rates and methanotrophic cell number at Svalbard seeps in summer 2011 and 2012 (cruises POS419 and MSM21/4) |
| topic | |
| url | https://doi.org/10.1594/PANGAEA.844013 |