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| Main Authors: | , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
2016
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.861845 |
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| _version_ | 1867170991601352704 |
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| author | Osudar, Roman Liebner, Susanne Alawi, Mashal Yang, Sizhong Bussmann, Ingeborg Wagner, Dirk |
| author_facet | Osudar, Roman Liebner, Susanne Alawi, Mashal Yang, Sizhong Bussmann, Ingeborg Wagner, Dirk |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Large amounts of organic carbon are stored in Arctic permafrost environments, and microbial activity can potentially mineralize this carbon into methane, a potent greenhouse gas. In this study, we assessed the methane budget, the bacterial methane oxidation (MOX) and the underlying environmental controls of arctic lake systems, which represent substantial sources of methane. Five lake systems located on Samoylov Island (Lena Delta, Siberia) and the connected river sites were analyzed using radiotracers to estimate the MOX rates, and molecular biology methods to characterize the abundance and the community composition of methane-oxidizing bacteria (MOB). In contrast to the river, the lake systems had high variation in the methane concentrations, the abundance and composition of the MOB communities, and consequently, the MOX rates. The highest methane concentrations and the highest MOX rates were detected in the lake outlets and in a lake complex in a floodplain area. Though, in all aquatic systems we detected both, Type I and II MOB, in lake systems we observed a higher diversity including MOB, typical of the soil environments. The inoculation of soil MOB into the aquatic systems, resulting from permafrost thawing, might be an additional factor controlling the MOB community composition and potentially methanotrophic capacity. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_861845 |
| institution | PANGAEA |
| language | en |
| publishDate | 2016 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Methane concentrations, MOX rates and MOB abundance in arctic aquatic ecosystems of the Lena Delta, Northeast Siberia Osudar, Roman Liebner, Susanne Alawi, Mashal Yang, Sizhong Bussmann, Ingeborg Wagner, Dirk Arctic Tundra; Area; Bacteria, methane oxidizing; Bacteria, methane oxidizing, standard deviation; Bacteria/Archaea; Comment; DATE/TIME; Depth, bathymetric; DEPTH, water; Lake; Lake/Pond; LATITUDE; LONGITUDE; Methane; Methane, oxidation rate; Methane, oxidation rate, standard deviation; Methane, standard deviation; MULT; Multiple investigations; oxidation/reduction; Oxygen; Record length; river delta; Salinity; Samoylov_Island; Samoylov Island, Lena Delta, Siberia; Suspended particulate matter; Temperature, water Large amounts of organic carbon are stored in Arctic permafrost environments, and microbial activity can potentially mineralize this carbon into methane, a potent greenhouse gas. In this study, we assessed the methane budget, the bacterial methane oxidation (MOX) and the underlying environmental controls of arctic lake systems, which represent substantial sources of methane. Five lake systems located on Samoylov Island (Lena Delta, Siberia) and the connected river sites were analyzed using radiotracers to estimate the MOX rates, and molecular biology methods to characterize the abundance and the community composition of methane-oxidizing bacteria (MOB). In contrast to the river, the lake systems had high variation in the methane concentrations, the abundance and composition of the MOB communities, and consequently, the MOX rates. The highest methane concentrations and the highest MOX rates were detected in the lake outlets and in a lake complex in a floodplain area. Though, in all aquatic systems we detected both, Type I and II MOB, in lake systems we observed a higher diversity including MOB, typical of the soil environments. The inoculation of soil MOB into the aquatic systems, resulting from permafrost thawing, might be an additional factor controlling the MOB community composition and potentially methanotrophic capacity. |
| title | (Table 1) Methane concentrations, MOX rates and MOB abundance in arctic aquatic ecosystems of the Lena Delta, Northeast Siberia |
| topic | Arctic Tundra; Area; Bacteria, methane oxidizing; Bacteria, methane oxidizing, standard deviation; Bacteria/Archaea; Comment; DATE/TIME; Depth, bathymetric; DEPTH, water; Lake; Lake/Pond; LATITUDE; LONGITUDE; Methane; Methane, oxidation rate; Methane, oxidation rate, standard deviation; Methane, standard deviation; MULT; Multiple investigations; oxidation/reduction; Oxygen; Record length; river delta; Salinity; Samoylov_Island; Samoylov Island, Lena Delta, Siberia; Suspended particulate matter; Temperature, water |
| url | https://doi.org/10.1594/PANGAEA.861845 |