Methane oxidation associated with submerged brown mosses reduces methane emissions from Siberian polygonal tundra
1. Methane (CH 4 ) oxidation (methanotrophy) associated with submerged brown moss species occurs in polygonal tundra environments of the Siberian Arctic. Methanotrophic bacteria living in close association with mosses are thus not restricted to Sphagnum species and low-pH peatlands. 2. Moss-associat...
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Online Access: | https://doi.org/10.1111/j.1365-2745.2011.01823.x |
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fteawag:oai:dora:eawag_6616 2024-09-15T18:30:01+00:00 Methane oxidation associated with submerged brown mosses reduces methane emissions from Siberian polygonal tundra Liebner, Susanne Zeyer, Josef Wagner, Dirk Schubert, Carsten Pfeiffer, Eva-Maria Knoblauch, Christian 2011 https://doi.org/10.1111/j.1365-2745.2011.01823.x eng eng Wiley Journal of Ecology--J. Ecol.--journals:1580--0022-0477--1365-2745 eawag:6616 journal id: journals:1580 issn: 0022-0477 e-issn: 1365-2745 ut: 000292419800004 local: 14838 scopus: 2-s2.0-79957648116 doi:10.1111/j.1365-2745.2011.01823.x aquatic mosses Arctic biomarker ecophysiology methanotrophy peatland permafrost plant–microbe interaction polygonal tundra stable isotope probing Text Journal Article 2011 fteawag https://doi.org/10.1111/j.1365-2745.2011.01823.x 2024-08-05T03:04:28Z 1. Methane (CH 4 ) oxidation (methanotrophy) associated with submerged brown moss species occurs in polygonal tundra environments of the Siberian Arctic. Methanotrophic bacteria living in close association with mosses are thus not restricted to Sphagnum species and low-pH peatlands. 2. Moss-associated methane oxidation (MAMO) can be an effective buffer for CH 4 emissions from permafrost-affected tundra, a region that is of high importance for the global greenhouse gas budget. Combining biogeochemical and molecular approaches revealed that MAMO in polygonal ponds exceeds methanotrophic activity in terrestrial sites by up to two orders of magnitude. 3. Moss-associated methane oxidation is not only promoted by submerged conditions but also by light exposure. Polygonal ponds covered by the brown moss Scorpidium scorpioides became a net sink for atmospheric CH 4 (−1.7 mg CH 4 m −2 day −1 ) when exposed to sunlight but a CH 4 source (21.6 mg CH 4 m −2 day −1 ) in the absence of light. 4. Based on stable isotope probing with 13 CH 4 , carbon deriving from CH 4 was incorporated into the bacterial fatty acids 16:1ω7 and 18:1ω9/ω7 common in methanotrophs and into plant phytol, sitosterol and stigmastanol, all of which are highly abundant in moss biomass. 5. Synthesis . A mutualistic symbiosis between methanotrophic bacteria and brown mosses reduces CH 4 emissions from Arctic polygonal tundra by at least 5%. Both partners benefit from this association: the moss from the additional CO 2 supplied through methane oxidation and the methane-oxidizing bacteria from the oxygen produced through photosynthesis. Considering that submerged mosses are widely abundant in the polar region, MAMO may have a major impact on carbon turnover rates in Arctic freshwater environments. Article in Journal/Newspaper permafrost Tundra DORA Eawag Journal of Ecology 99 4 914 922 |
institution |
Open Polar |
collection |
DORA Eawag |
op_collection_id |
fteawag |
language |
English |
topic |
aquatic mosses Arctic biomarker ecophysiology methanotrophy peatland permafrost plant–microbe interaction polygonal tundra stable isotope probing |
spellingShingle |
aquatic mosses Arctic biomarker ecophysiology methanotrophy peatland permafrost plant–microbe interaction polygonal tundra stable isotope probing Liebner, Susanne Zeyer, Josef Wagner, Dirk Schubert, Carsten Pfeiffer, Eva-Maria Knoblauch, Christian Methane oxidation associated with submerged brown mosses reduces methane emissions from Siberian polygonal tundra |
topic_facet |
aquatic mosses Arctic biomarker ecophysiology methanotrophy peatland permafrost plant–microbe interaction polygonal tundra stable isotope probing |
description |
1. Methane (CH 4 ) oxidation (methanotrophy) associated with submerged brown moss species occurs in polygonal tundra environments of the Siberian Arctic. Methanotrophic bacteria living in close association with mosses are thus not restricted to Sphagnum species and low-pH peatlands. 2. Moss-associated methane oxidation (MAMO) can be an effective buffer for CH 4 emissions from permafrost-affected tundra, a region that is of high importance for the global greenhouse gas budget. Combining biogeochemical and molecular approaches revealed that MAMO in polygonal ponds exceeds methanotrophic activity in terrestrial sites by up to two orders of magnitude. 3. Moss-associated methane oxidation is not only promoted by submerged conditions but also by light exposure. Polygonal ponds covered by the brown moss Scorpidium scorpioides became a net sink for atmospheric CH 4 (−1.7 mg CH 4 m −2 day −1 ) when exposed to sunlight but a CH 4 source (21.6 mg CH 4 m −2 day −1 ) in the absence of light. 4. Based on stable isotope probing with 13 CH 4 , carbon deriving from CH 4 was incorporated into the bacterial fatty acids 16:1ω7 and 18:1ω9/ω7 common in methanotrophs and into plant phytol, sitosterol and stigmastanol, all of which are highly abundant in moss biomass. 5. Synthesis . A mutualistic symbiosis between methanotrophic bacteria and brown mosses reduces CH 4 emissions from Arctic polygonal tundra by at least 5%. Both partners benefit from this association: the moss from the additional CO 2 supplied through methane oxidation and the methane-oxidizing bacteria from the oxygen produced through photosynthesis. Considering that submerged mosses are widely abundant in the polar region, MAMO may have a major impact on carbon turnover rates in Arctic freshwater environments. |
format |
Article in Journal/Newspaper |
author |
Liebner, Susanne Zeyer, Josef Wagner, Dirk Schubert, Carsten Pfeiffer, Eva-Maria Knoblauch, Christian |
author_facet |
Liebner, Susanne Zeyer, Josef Wagner, Dirk Schubert, Carsten Pfeiffer, Eva-Maria Knoblauch, Christian |
author_sort |
Liebner, Susanne |
title |
Methane oxidation associated with submerged brown mosses reduces methane emissions from Siberian polygonal tundra |
title_short |
Methane oxidation associated with submerged brown mosses reduces methane emissions from Siberian polygonal tundra |
title_full |
Methane oxidation associated with submerged brown mosses reduces methane emissions from Siberian polygonal tundra |
title_fullStr |
Methane oxidation associated with submerged brown mosses reduces methane emissions from Siberian polygonal tundra |
title_full_unstemmed |
Methane oxidation associated with submerged brown mosses reduces methane emissions from Siberian polygonal tundra |
title_sort |
methane oxidation associated with submerged brown mosses reduces methane emissions from siberian polygonal tundra |
publisher |
Wiley |
publishDate |
2011 |
url |
https://doi.org/10.1111/j.1365-2745.2011.01823.x |
genre |
permafrost Tundra |
genre_facet |
permafrost Tundra |
op_relation |
Journal of Ecology--J. Ecol.--journals:1580--0022-0477--1365-2745 eawag:6616 journal id: journals:1580 issn: 0022-0477 e-issn: 1365-2745 ut: 000292419800004 local: 14838 scopus: 2-s2.0-79957648116 doi:10.1111/j.1365-2745.2011.01823.x |
op_doi |
https://doi.org/10.1111/j.1365-2745.2011.01823.x |
container_title |
Journal of Ecology |
container_volume |
99 |
container_issue |
4 |
container_start_page |
914 |
op_container_end_page |
922 |
_version_ |
1810471503823634432 |