Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
2010
|
| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.787657 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1867171584803864576 |
|---|---|
| author | Damm, Ellen Helmke, Elisabeth Thoms, Silke Schauer, Ursula Nöthig, Eva-Maria Bakker, Karel Kiene, Ronald P |
| author_facet | Damm, Ellen Helmke, Elisabeth Thoms, Silke Schauer, Ursula Nöthig, Eva-Maria Bakker, Karel Kiene, Ronald P |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | A methane surplus relative to the atmospheric equilibrium is a frequently observed feature of ocean surface water. Despite the common fact that biological processes are responsible for its origin, the formation of methane in aerobic surface water is still poorly understood. We report on methane production in the central Arctic Ocean, which was exclusively detected in Pacific derived water but not nearby in Atlantic derived water. The two water masses are distinguished by their different nitrate to phosphate ratios. We show that methane production occurs if nitrate is depleted but phosphate is available as a P source. Apparently the low N:P ratio enhances the ability of bacteria to compete for phosphate while the phytoplankton metabolite dimethylsulfoniopropionate (DMSP) is utilized as a C source. This was verified by experimentally induced methane production in DMSP spiked Arctic sea water. Accordingly we propose that methylated compounds may serve as precursors for methane and thermodynamic calculations show that methylotrophic methanogenesis can provide energy in aerobic environments. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_787657 |
| institution | PANGAEA |
| language | en |
| publishDate | 2010 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Methane measurements during POLARSTERN cruise ARK-XXII/2 Damm, Ellen Helmke, Elisabeth Thoms, Silke Schauer, Ursula Nöthig, Eva-Maria Bakker, Karel Kiene, Ronald P Arctic Ocean; ARK-XXII/2; Bottle number; CTD/Rosette; CTD/Rosette, ultra clean; CTD-RO; CTD-UC; Date/Time of event; DEPTH, water; Dimethylsulfoniopropionate; Elevation of event; Event label; Gas chromatography; GEOTRACES; Global marine biogeochemical cycles of trace elements and their isotopes; Laptev Sea; Latitude of event; Longitude of event; Mass spectrometer Finnigan Delta Plus XP; Methane; Polarstern; PS70/260-9; PS70/263-1; PS70/264-1; PS70/266-1; PS70/268-1; PS70/271-2; PS70/272-1; PS70/279-7; PS70/280-1; PS70/284-1; PS70/285-2; PS70/291-1; PS70/295-1; PS70/299-1; PS70/301-5; PS70/301-7; PS70/306-1; PS70/308-1; PS70/310-1; PS70/314-1; PS70/321-1; PS70/326-1; PS70/328-11; PS70/328-9; PS70/331-1; PS70/335-1; PS70/338-3; PS70/338-5; PS70/340-1; PS70/342-7; PS70/342-9; PS70/345-1; PS70/346-1; PS70/349-2; PS70/352-3; PS70/352-5; PS70/358-1; PS70/362-1; PS70/403-1; PS70/405-1; PS70/407-2; PS70/407-4; PS70/408-1; PS70/409-1; PS70/410-1; PS70/411-2; PS70 SPACE DAMOCLES; δ13C, methane A methane surplus relative to the atmospheric equilibrium is a frequently observed feature of ocean surface water. Despite the common fact that biological processes are responsible for its origin, the formation of methane in aerobic surface water is still poorly understood. We report on methane production in the central Arctic Ocean, which was exclusively detected in Pacific derived water but not nearby in Atlantic derived water. The two water masses are distinguished by their different nitrate to phosphate ratios. We show that methane production occurs if nitrate is depleted but phosphate is available as a P source. Apparently the low N:P ratio enhances the ability of bacteria to compete for phosphate while the phytoplankton metabolite dimethylsulfoniopropionate (DMSP) is utilized as a C source. This was verified by experimentally induced methane production in DMSP spiked Arctic sea water. Accordingly we propose that methylated compounds may serve as precursors for methane and thermodynamic calculations show that methylotrophic methanogenesis can provide energy in aerobic environments. |
| title | Methane measurements during POLARSTERN cruise ARK-XXII/2 |
| topic | Arctic Ocean; ARK-XXII/2; Bottle number; CTD/Rosette; CTD/Rosette, ultra clean; CTD-RO; CTD-UC; Date/Time of event; DEPTH, water; Dimethylsulfoniopropionate; Elevation of event; Event label; Gas chromatography; GEOTRACES; Global marine biogeochemical cycles of trace elements and their isotopes; Laptev Sea; Latitude of event; Longitude of event; Mass spectrometer Finnigan Delta Plus XP; Methane; Polarstern; PS70/260-9; PS70/263-1; PS70/264-1; PS70/266-1; PS70/268-1; PS70/271-2; PS70/272-1; PS70/279-7; PS70/280-1; PS70/284-1; PS70/285-2; PS70/291-1; PS70/295-1; PS70/299-1; PS70/301-5; PS70/301-7; PS70/306-1; PS70/308-1; PS70/310-1; PS70/314-1; PS70/321-1; PS70/326-1; PS70/328-11; PS70/328-9; PS70/331-1; PS70/335-1; PS70/338-3; PS70/338-5; PS70/340-1; PS70/342-7; PS70/342-9; PS70/345-1; PS70/346-1; PS70/349-2; PS70/352-3; PS70/352-5; PS70/358-1; PS70/362-1; PS70/403-1; PS70/405-1; PS70/407-2; PS70/407-4; PS70/408-1; PS70/409-1; PS70/410-1; PS70/411-2; PS70 SPACE DAMOCLES; δ13C, methane |
| url | https://doi.org/10.1594/PANGAEA.787657 |