Methane distribution & methane oxidation around the Lena Delta, Siberia, Russia
The Lena River is one of the biggest Russian rivers draining into the Laptev Sea. Due to predicted increasing temperatures the permafrost areas surrounding the Lena will melt at increasing rates. With this melting high amounts of carbon, either organic or as methane will reach the waters of the Lena...
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ftawi:oai:epic.awi.de:41269 2024-09-15T18:17:33+00:00 Methane distribution & methane oxidation around the Lena Delta, Siberia, Russia Bussmann, Ingeborg Schaal, Patrick Hackbusch, Steffen Wichels, Antje 2016-06 https://epic.awi.de/id/eprint/41269/ https://hdl.handle.net/10013/epic.48208 unknown Bussmann, I. orcid:0000-0002-1197-7461 , Schaal, P. , Hackbusch, S. and Wichels, A. orcid:0000-0002-2060-1845 (2016) Methane distribution & methane oxidation around the Lena Delta, Siberia, Russia , XI. International Conference on Permafrost, Potsdam, 20 June 2016 - 24 June 2016 . hdl:10013/epic.48208 EPIC3XI. International Conference on Permafrost, Potsdam, 2016-06-20-2016-06-24 Conference notRev 2016 ftawi 2024-06-24T04:14:20Z The Lena River is one of the biggest Russian rivers draining into the Laptev Sea. Due to predicted increasing temperatures the permafrost areas surrounding the Lena will melt at increasing rates. With this melting high amounts of carbon, either organic or as methane will reach the waters of the Lena and the adjacent Laptev Sea. As methane is an important green house gas its further fate in the Lena Delta is of uttermost importance. Methane oxidation by methanotrophic bacteria is the only biological way to reduce methane concentrations. However, the polar estuary of the Lena River is a challenging environment, with strong fluctuations in salinity and temperature. We determined the activity and abundance of aerobic methanotrophic bacteria (MOB), as well as their population structure. Activity was determined with 3H-CH4 as radioactive tracer, abundance was determined with quantitative PCR and the population structure was characterized by a fingerprinting method (MISA). Methane concentrations were rather low (41 ± 44 nM), as well as methane oxidation rates (1.1 ± 1.6 nM/d). In polar water (cold and saline) highest activities were found, whereas the highest abundance of MOB was in surface waters. The relation between methane turnover and abiotic factors will be used to characterize the eco-physiology of these polar and estuarine methanotrophs Conference Object laptev Laptev Sea lena delta lena river permafrost Siberia Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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description |
The Lena River is one of the biggest Russian rivers draining into the Laptev Sea. Due to predicted increasing temperatures the permafrost areas surrounding the Lena will melt at increasing rates. With this melting high amounts of carbon, either organic or as methane will reach the waters of the Lena and the adjacent Laptev Sea. As methane is an important green house gas its further fate in the Lena Delta is of uttermost importance. Methane oxidation by methanotrophic bacteria is the only biological way to reduce methane concentrations. However, the polar estuary of the Lena River is a challenging environment, with strong fluctuations in salinity and temperature. We determined the activity and abundance of aerobic methanotrophic bacteria (MOB), as well as their population structure. Activity was determined with 3H-CH4 as radioactive tracer, abundance was determined with quantitative PCR and the population structure was characterized by a fingerprinting method (MISA). Methane concentrations were rather low (41 ± 44 nM), as well as methane oxidation rates (1.1 ± 1.6 nM/d). In polar water (cold and saline) highest activities were found, whereas the highest abundance of MOB was in surface waters. The relation between methane turnover and abiotic factors will be used to characterize the eco-physiology of these polar and estuarine methanotrophs |
format |
Conference Object |
author |
Bussmann, Ingeborg Schaal, Patrick Hackbusch, Steffen Wichels, Antje |
spellingShingle |
Bussmann, Ingeborg Schaal, Patrick Hackbusch, Steffen Wichels, Antje Methane distribution & methane oxidation around the Lena Delta, Siberia, Russia |
author_facet |
Bussmann, Ingeborg Schaal, Patrick Hackbusch, Steffen Wichels, Antje |
author_sort |
Bussmann, Ingeborg |
title |
Methane distribution & methane oxidation around the Lena Delta, Siberia, Russia |
title_short |
Methane distribution & methane oxidation around the Lena Delta, Siberia, Russia |
title_full |
Methane distribution & methane oxidation around the Lena Delta, Siberia, Russia |
title_fullStr |
Methane distribution & methane oxidation around the Lena Delta, Siberia, Russia |
title_full_unstemmed |
Methane distribution & methane oxidation around the Lena Delta, Siberia, Russia |
title_sort |
methane distribution & methane oxidation around the lena delta, siberia, russia |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/41269/ https://hdl.handle.net/10013/epic.48208 |
genre |
laptev Laptev Sea lena delta lena river permafrost Siberia |
genre_facet |
laptev Laptev Sea lena delta lena river permafrost Siberia |
op_source |
EPIC3XI. International Conference on Permafrost, Potsdam, 2016-06-20-2016-06-24 |
op_relation |
Bussmann, I. orcid:0000-0002-1197-7461 , Schaal, P. , Hackbusch, S. and Wichels, A. orcid:0000-0002-2060-1845 (2016) Methane distribution & methane oxidation around the Lena Delta, Siberia, Russia , XI. International Conference on Permafrost, Potsdam, 20 June 2016 - 24 June 2016 . hdl:10013/epic.48208 |
_version_ |
1810455593841852416 |