Archaeal nitrification is a key driver of high nitrous oxide emissions from arctic peatlands
Bare peat surfaces created by frost action and wind erosion in permafrost peatlands have been shown to emit high amounts of nitrous oxide (N2O). With global warming, emissions of this highly potent greenhouse gas are expected to increase in Arctic permafrost peatlands. In natural unmanaged soils wit...
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ftuniveasternfin:oai:erepo.uef.fi:123456789/7730 2024-06-16T07:37:10+00:00 Archaeal nitrification is a key driver of high nitrous oxide emissions from arctic peatlands Siljanen, Henri M P Alves, Ricardo J E Ronkainen, Jussi Lamprecht, Richard E Bhattarai, Hem R Bagnoud, Alexandre Marushchak, Maija E Martikainen, Pertti J Schleper, Christa Biasi, Christina Ympäristö- ja biotieteiden laitos / Toiminta 2019-08-26T09:33:20Z https://erepo.uef.fi/handle/123456789/7730 englanti unknown Elsevier BV Soil biology and biochemistry http://dx.doi.org/10.1016/j.soilbio.2019.107539 10.1016/j.soilbio.2019.107539 107539 0038-0717 137 https://erepo.uef.fi/handle/123456789/7730 CC BY-NC-ND 4.0 openAccess © Elsevier Ltd. https://creativecommons.org/licenses/by-nc-nd/4.0/ ammonia oxidation AOA permafrost climate change Tieteelliset aikakauslehtiartikkelit A1 article artikkeli 2019 ftuniveasternfin https://doi.org/10.1016/j.soilbio.2019.107539 2024-05-23T03:07:27Z Bare peat surfaces created by frost action and wind erosion in permafrost peatlands have been shown to emit high amounts of nitrous oxide (N2O). With global warming, emissions of this highly potent greenhouse gas are expected to increase in Arctic permafrost peatlands. In natural unmanaged soils with low nitrogen deposition, such as Arctic soils, nitrification is the main source of nitrite and nitrate, and thus a key driver of N2O emissions. Here, we investigated nitrification, ammonia oxidizer populations and N2O production in vegetated and bare peat soils from four distant Arctic geographic locations. Through a combination of molecular analyses and group-specific inhibitor assays, we show that ammonia oxidation, the first step in nitrification, is mainly performed by ammonia-oxidizing archaea (AOA). All soils from different locations, including bare peat soils with high N2O emissions, harbored only two AOA phylotypes, including an organism closely related to Ca. Nitrosocosmicus spp. This indicates that high N2O emissions from these ecosystems are primarily fueled by nitrification mediated by very few archaeal species. To our knowledge, arctic peat soils in this study are the first natural environments where high N2O emissions have been linked to AOA. Any changes in archaeal nitrification induced by global warming will therefore impact on N2O emissions from the permafrost peatlands. final draft peerReviewed Article in Journal/Newspaper Arctic Climate change Global warming permafrost UEF eRepository (University of Eastern Finland) Arctic Soil Biology and Biochemistry 137 107539 |
institution |
Open Polar |
collection |
UEF eRepository (University of Eastern Finland) |
op_collection_id |
ftuniveasternfin |
language |
unknown |
topic |
ammonia oxidation AOA permafrost climate change |
spellingShingle |
ammonia oxidation AOA permafrost climate change Siljanen, Henri M P Alves, Ricardo J E Ronkainen, Jussi Lamprecht, Richard E Bhattarai, Hem R Bagnoud, Alexandre Marushchak, Maija E Martikainen, Pertti J Schleper, Christa Biasi, Christina Archaeal nitrification is a key driver of high nitrous oxide emissions from arctic peatlands |
topic_facet |
ammonia oxidation AOA permafrost climate change |
description |
Bare peat surfaces created by frost action and wind erosion in permafrost peatlands have been shown to emit high amounts of nitrous oxide (N2O). With global warming, emissions of this highly potent greenhouse gas are expected to increase in Arctic permafrost peatlands. In natural unmanaged soils with low nitrogen deposition, such as Arctic soils, nitrification is the main source of nitrite and nitrate, and thus a key driver of N2O emissions. Here, we investigated nitrification, ammonia oxidizer populations and N2O production in vegetated and bare peat soils from four distant Arctic geographic locations. Through a combination of molecular analyses and group-specific inhibitor assays, we show that ammonia oxidation, the first step in nitrification, is mainly performed by ammonia-oxidizing archaea (AOA). All soils from different locations, including bare peat soils with high N2O emissions, harbored only two AOA phylotypes, including an organism closely related to Ca. Nitrosocosmicus spp. This indicates that high N2O emissions from these ecosystems are primarily fueled by nitrification mediated by very few archaeal species. To our knowledge, arctic peat soils in this study are the first natural environments where high N2O emissions have been linked to AOA. Any changes in archaeal nitrification induced by global warming will therefore impact on N2O emissions from the permafrost peatlands. final draft peerReviewed |
author2 |
Ympäristö- ja biotieteiden laitos / Toiminta |
format |
Article in Journal/Newspaper |
author |
Siljanen, Henri M P Alves, Ricardo J E Ronkainen, Jussi Lamprecht, Richard E Bhattarai, Hem R Bagnoud, Alexandre Marushchak, Maija E Martikainen, Pertti J Schleper, Christa Biasi, Christina |
author_facet |
Siljanen, Henri M P Alves, Ricardo J E Ronkainen, Jussi Lamprecht, Richard E Bhattarai, Hem R Bagnoud, Alexandre Marushchak, Maija E Martikainen, Pertti J Schleper, Christa Biasi, Christina |
author_sort |
Siljanen, Henri M P |
title |
Archaeal nitrification is a key driver of high nitrous oxide emissions from arctic peatlands |
title_short |
Archaeal nitrification is a key driver of high nitrous oxide emissions from arctic peatlands |
title_full |
Archaeal nitrification is a key driver of high nitrous oxide emissions from arctic peatlands |
title_fullStr |
Archaeal nitrification is a key driver of high nitrous oxide emissions from arctic peatlands |
title_full_unstemmed |
Archaeal nitrification is a key driver of high nitrous oxide emissions from arctic peatlands |
title_sort |
archaeal nitrification is a key driver of high nitrous oxide emissions from arctic peatlands |
publisher |
Elsevier BV |
publishDate |
2019 |
url |
https://erepo.uef.fi/handle/123456789/7730 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Global warming permafrost |
genre_facet |
Arctic Climate change Global warming permafrost |
op_relation |
Soil biology and biochemistry http://dx.doi.org/10.1016/j.soilbio.2019.107539 10.1016/j.soilbio.2019.107539 107539 0038-0717 137 https://erepo.uef.fi/handle/123456789/7730 |
op_rights |
CC BY-NC-ND 4.0 openAccess © Elsevier Ltd. https://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1016/j.soilbio.2019.107539 |
container_title |
Soil Biology and Biochemistry |
container_volume |
137 |
container_start_page |
107539 |
_version_ |
1802003697175101440 |