Methanotroph populations and CH 4 oxidation potentials in High Arctic peat are altered by herbivory induced vegetation change
Methane oxidizing bacteria (methanotrophs) within the genus Methylobacter constitute the biological filter for methane (CH 4 ) in many Arctic soils. Multiple Methylobacter strains have been identified in these environments but we seldom know the ecological significance of the different strains. High...
Published in: | FEMS Microbiology Ecology |
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Language: | English |
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Oxford University Press
2020
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Online Access: | https://hdl.handle.net/10037/19936 https://doi.org/10.1093/femsec/fiaa140 |
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ftunivtroemsoe:oai:munin.uit.no:10037/19936 2023-05-15T14:22:08+02:00 Methanotroph populations and CH 4 oxidation potentials in High Arctic peat are altered by herbivory induced vegetation change Rainer, Edda Marie Seppey, Victor William Christophe Tveit, Alexander Tøsdal Svenning, Mette Marianne 2020-07-08 https://hdl.handle.net/10037/19936 https://doi.org/10.1093/femsec/fiaa140 eng eng Oxford University Press Rainer, E.M. (2022). Response and resilience of the microbial methane filter to ecosystem changes in Arctic peatlands. (Doctoral thesis). https://hdl.handle.net/10037/25384 . FEMS Microbiology Ecology info:eu-repo/grantAgreement/RCN/SSF/256933/Norway/The Microbial Methane Filter in the Arctic: Resilience and Response to Climate Change/RIS-ID 10208/ info:eu-repo/grantAgreement/RCN/FRIMEDBIO/251027/Norway/Time & Energy: Fundamental microbial mechanisms that control CH4 dynamics in a warming Arctic// info:eu-repo/grantAgreement/RCN/MILJØFORSK/270252/Norway/BiodivERsA-Climate change impacts on Arctic soil and lake microbiomes// info:eu-repo/grantAgreement/RCN/LATIN-AM/256132/Norway/ERAnet-LAC, METHAnogenic Biodiversity and activity in Arctic and Subantarctic Ecosystems affected by climate change/METHABASE, DCC-92/ Rainer E, Seppey CVW, Tveit AT, Svenning MM. Methanotroph populations and CH 4 oxidation potentials in High Arctic peat are altered by herbivory induced vegetation change. FEMS Microbiology Ecology. 2020;96(10) FRIDAID 1849192 doi:10.1093/femsec/fiaa140 0168-6496 1574-6941 https://hdl.handle.net/10037/19936 openAccess Copyright 2020 The Author(s) VDP::Medical disciplines: 700::Basic medical dental and veterinary science disciplines: 710 VDP::Medisinske Fag: 700::Basale medisinske odontologiske og veterinærmedisinske fag: 710 VDP::Mathematics and natural science: 400::Chemistry: 440 VDP::Matematikk og Naturvitenskap: 400::Kjemi: 440 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2020 ftunivtroemsoe https://doi.org/10.1093/femsec/fiaa140 2022-06-08T22:58:57Z Methane oxidizing bacteria (methanotrophs) within the genus Methylobacter constitute the biological filter for methane (CH 4 ) in many Arctic soils. Multiple Methylobacter strains have been identified in these environments but we seldom know the ecological significance of the different strains. High-Arctic peatlands in Svalbard are heavily influenced by herbivory, leading to reduced vascular plant and root biomass. Here, we have measured potential CH 4 oxidation rates and identified the active methantrophs in grazed peat and peat protected from grazing by fencing (exclosures) for 18 years. Grazed peat sustained a higher water table, higher CH 4 concentrations and lower oxygen (O 2 ) concentrations than exclosed peat. Correspondingly, the highest CH 4 oxidation potentials were closer to the O 2 rich surface in the grazed than in the protected peat. A comparison of 16S rRNA genes showed that the majority of methanotrophs in both sites belong to the genus Methylobacter . Further analyses of pmoA transcripts revealed that several Methylobacter OTUs were active in the peat but that different OTUs dominated the grazed peat than the exclosed peat. We conclude that grazing influences soil conditions, the active CH 4 filter and that different Methylobacter populations are responsible for CH 4 oxidation depending on the environmental conditions. Article in Journal/Newspaper Arctic Arctic Svalbard University of Tromsø: Munin Open Research Archive Arctic Svalbard FEMS Microbiology Ecology 96 10 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Medical disciplines: 700::Basic medical dental and veterinary science disciplines: 710 VDP::Medisinske Fag: 700::Basale medisinske odontologiske og veterinærmedisinske fag: 710 VDP::Mathematics and natural science: 400::Chemistry: 440 VDP::Matematikk og Naturvitenskap: 400::Kjemi: 440 |
spellingShingle |
VDP::Medical disciplines: 700::Basic medical dental and veterinary science disciplines: 710 VDP::Medisinske Fag: 700::Basale medisinske odontologiske og veterinærmedisinske fag: 710 VDP::Mathematics and natural science: 400::Chemistry: 440 VDP::Matematikk og Naturvitenskap: 400::Kjemi: 440 Rainer, Edda Marie Seppey, Victor William Christophe Tveit, Alexander Tøsdal Svenning, Mette Marianne Methanotroph populations and CH 4 oxidation potentials in High Arctic peat are altered by herbivory induced vegetation change |
topic_facet |
VDP::Medical disciplines: 700::Basic medical dental and veterinary science disciplines: 710 VDP::Medisinske Fag: 700::Basale medisinske odontologiske og veterinærmedisinske fag: 710 VDP::Mathematics and natural science: 400::Chemistry: 440 VDP::Matematikk og Naturvitenskap: 400::Kjemi: 440 |
description |
Methane oxidizing bacteria (methanotrophs) within the genus Methylobacter constitute the biological filter for methane (CH 4 ) in many Arctic soils. Multiple Methylobacter strains have been identified in these environments but we seldom know the ecological significance of the different strains. High-Arctic peatlands in Svalbard are heavily influenced by herbivory, leading to reduced vascular plant and root biomass. Here, we have measured potential CH 4 oxidation rates and identified the active methantrophs in grazed peat and peat protected from grazing by fencing (exclosures) for 18 years. Grazed peat sustained a higher water table, higher CH 4 concentrations and lower oxygen (O 2 ) concentrations than exclosed peat. Correspondingly, the highest CH 4 oxidation potentials were closer to the O 2 rich surface in the grazed than in the protected peat. A comparison of 16S rRNA genes showed that the majority of methanotrophs in both sites belong to the genus Methylobacter . Further analyses of pmoA transcripts revealed that several Methylobacter OTUs were active in the peat but that different OTUs dominated the grazed peat than the exclosed peat. We conclude that grazing influences soil conditions, the active CH 4 filter and that different Methylobacter populations are responsible for CH 4 oxidation depending on the environmental conditions. |
format |
Article in Journal/Newspaper |
author |
Rainer, Edda Marie Seppey, Victor William Christophe Tveit, Alexander Tøsdal Svenning, Mette Marianne |
author_facet |
Rainer, Edda Marie Seppey, Victor William Christophe Tveit, Alexander Tøsdal Svenning, Mette Marianne |
author_sort |
Rainer, Edda Marie |
title |
Methanotroph populations and CH 4 oxidation potentials in High Arctic peat are altered by herbivory induced vegetation change |
title_short |
Methanotroph populations and CH 4 oxidation potentials in High Arctic peat are altered by herbivory induced vegetation change |
title_full |
Methanotroph populations and CH 4 oxidation potentials in High Arctic peat are altered by herbivory induced vegetation change |
title_fullStr |
Methanotroph populations and CH 4 oxidation potentials in High Arctic peat are altered by herbivory induced vegetation change |
title_full_unstemmed |
Methanotroph populations and CH 4 oxidation potentials in High Arctic peat are altered by herbivory induced vegetation change |
title_sort |
methanotroph populations and ch 4 oxidation potentials in high arctic peat are altered by herbivory induced vegetation change |
publisher |
Oxford University Press |
publishDate |
2020 |
url |
https://hdl.handle.net/10037/19936 https://doi.org/10.1093/femsec/fiaa140 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Arctic Svalbard |
genre_facet |
Arctic Arctic Svalbard |
op_relation |
Rainer, E.M. (2022). Response and resilience of the microbial methane filter to ecosystem changes in Arctic peatlands. (Doctoral thesis). https://hdl.handle.net/10037/25384 . FEMS Microbiology Ecology info:eu-repo/grantAgreement/RCN/SSF/256933/Norway/The Microbial Methane Filter in the Arctic: Resilience and Response to Climate Change/RIS-ID 10208/ info:eu-repo/grantAgreement/RCN/FRIMEDBIO/251027/Norway/Time & Energy: Fundamental microbial mechanisms that control CH4 dynamics in a warming Arctic// info:eu-repo/grantAgreement/RCN/MILJØFORSK/270252/Norway/BiodivERsA-Climate change impacts on Arctic soil and lake microbiomes// info:eu-repo/grantAgreement/RCN/LATIN-AM/256132/Norway/ERAnet-LAC, METHAnogenic Biodiversity and activity in Arctic and Subantarctic Ecosystems affected by climate change/METHABASE, DCC-92/ Rainer E, Seppey CVW, Tveit AT, Svenning MM. Methanotroph populations and CH 4 oxidation potentials in High Arctic peat are altered by herbivory induced vegetation change. FEMS Microbiology Ecology. 2020;96(10) FRIDAID 1849192 doi:10.1093/femsec/fiaa140 0168-6496 1574-6941 https://hdl.handle.net/10037/19936 |
op_rights |
openAccess Copyright 2020 The Author(s) |
op_doi |
https://doi.org/10.1093/femsec/fiaa140 |
container_title |
FEMS Microbiology Ecology |
container_volume |
96 |
container_issue |
10 |
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1766294797193052160 |