Response and resilience of the microbial methane filter to ecosystem changes in Arctic peatlands
Climate change is a major concern in the Arctic region, as large amounts of organic carbon (C) are stored in permafrost soils and sediments. Increasing average temperatures have the potential to release that C and making it available to biologic activity. Carbon-rich, anoxic soils such as peatlands...
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UiT The Arctic University of Norway
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ftunivtroemsoe:oai:munin.uit.no:10037/25384 2023-05-15T14:27:14+02:00 Response and resilience of the microbial methane filter to ecosystem changes in Arctic peatlands Rainer, Edda Marie 2022-06-30 https://hdl.handle.net/10037/25384 eng eng UiT The Arctic University of Norway UiT Norges arktiske universitet Paper I: Rainer, E.M., Seppey, C.V.W., Tveit, A.T. & Svenning, M.M. (2020). Methanotroph populations and CH4 oxidation potentials in high-Arctic peat are altered by herbivory induced vegetation change. FEMS Microbiology Ecology, 96 (10), fiaa140. Also available in Munin at https://hdl.handle.net/10037/19936 . Paper II: Rainer, E.M., Seppey, C.V.W., Hammer, C., Svenning, M.M. & Tveit, A.T. (2021). The Influence of Above-Ground Herbivory on the Response of Arctic Soil Methanotrophs to Increasing CH 4 Concentrations and Temperatures. Microorganisms, 9 (10), 2080. Also available in Munin at https://hdl.handle.net/10037/23458 . Paper III: Tveit, A.T., Söllinger, A., Rainer, E.M., Didriksen, A., Hestnes, A.G., Motleleng, L., Hellinger, H.J., Rattei, T. & Svenning, M.M. Glycogen storage and ribosome regulation controls methanotroph temperature acclimation. (Manuscript). Now published as: Thermal acclimation of methanotrophs from the genus Methylobacter . ISME Journal , 2023, available at https://doi.org/10.1038/s41396-023-01363-7 . 978-82-8266-229-1 https://hdl.handle.net/10037/25384 Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2022 The Author(s) https://creativecommons.org/licenses/by/4.0 CC-BY VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470::Generell mikrobiologi: 472 VDP::Mathematics and natural science: 400::Basic biosciences: 470::General microbiology: 472 DOKTOR-002 Doctoral thesis Doktorgradsavhandling 2022 ftunivtroemsoe 2023-02-16T00:04:07Z Climate change is a major concern in the Arctic region, as large amounts of organic carbon (C) are stored in permafrost soils and sediments. Increasing average temperatures have the potential to release that C and making it available to biologic activity. Carbon-rich, anoxic soils such as peatlands are inhabited by methanogenic archaea that can metabolize by-products of microbial C decomposition and consequently release methane (CH 4 ). Methane oxidizing bacteria (MOB) comprise a major biological filter for CH 4 in terrestrial and aquatic ecosystems and thereby regulate CH 4 emissions to the atmosphere. The genus Methylobacter has been detected in many CH 4 rich ecosystems and several circumpolar locations. Climate change in the Arctic includes changes in both temperature and precipitation as well as ecosystem changes related to plant cover and herbivory. All of these changes have the potential to influence soil structure and soil biological processes. Thus, they are important factors controlling the soil C cycle and eventually the activity of MOB. The aim of this thesis was to investigate the ability of the Arctic biological CH 4 filter to adapt to changes in vegetation, CH 4 concentrations and temperature. Further, to gain insights in the resilience and resistance of the MOB community to environmental changes. We have shown that herbivory by geese changes the soil structure and thus the vertical distribution of CH 4 and oxygen (O 2 ) concentrations in a high Arctic peatland. These differences are accompanied by changes in the potential rates of CH 4 oxidation. The highest activity was detected in shallower parts of the peatland in grazed sites compared to sites protected from grazing. Different MOB communities are responsible for the CH 4 oxidation, depending on the above ground grazing and these communities are composed of closely related Methylobacter OTUs. Exposing peat soils from both grazed and protected sites to increased CH 4 concentrations and temperature revealed that MOB respond strongly to changing ... Doctoral or Postdoctoral Thesis Arctic Arctic Climate change permafrost University of Tromsø: Munin Open Research Archive Arctic |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470::Generell mikrobiologi: 472 VDP::Mathematics and natural science: 400::Basic biosciences: 470::General microbiology: 472 DOKTOR-002 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470::Generell mikrobiologi: 472 VDP::Mathematics and natural science: 400::Basic biosciences: 470::General microbiology: 472 DOKTOR-002 Rainer, Edda Marie Response and resilience of the microbial methane filter to ecosystem changes in Arctic peatlands |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470::Generell mikrobiologi: 472 VDP::Mathematics and natural science: 400::Basic biosciences: 470::General microbiology: 472 DOKTOR-002 |
description |
Climate change is a major concern in the Arctic region, as large amounts of organic carbon (C) are stored in permafrost soils and sediments. Increasing average temperatures have the potential to release that C and making it available to biologic activity. Carbon-rich, anoxic soils such as peatlands are inhabited by methanogenic archaea that can metabolize by-products of microbial C decomposition and consequently release methane (CH 4 ). Methane oxidizing bacteria (MOB) comprise a major biological filter for CH 4 in terrestrial and aquatic ecosystems and thereby regulate CH 4 emissions to the atmosphere. The genus Methylobacter has been detected in many CH 4 rich ecosystems and several circumpolar locations. Climate change in the Arctic includes changes in both temperature and precipitation as well as ecosystem changes related to plant cover and herbivory. All of these changes have the potential to influence soil structure and soil biological processes. Thus, they are important factors controlling the soil C cycle and eventually the activity of MOB. The aim of this thesis was to investigate the ability of the Arctic biological CH 4 filter to adapt to changes in vegetation, CH 4 concentrations and temperature. Further, to gain insights in the resilience and resistance of the MOB community to environmental changes. We have shown that herbivory by geese changes the soil structure and thus the vertical distribution of CH 4 and oxygen (O 2 ) concentrations in a high Arctic peatland. These differences are accompanied by changes in the potential rates of CH 4 oxidation. The highest activity was detected in shallower parts of the peatland in grazed sites compared to sites protected from grazing. Different MOB communities are responsible for the CH 4 oxidation, depending on the above ground grazing and these communities are composed of closely related Methylobacter OTUs. Exposing peat soils from both grazed and protected sites to increased CH 4 concentrations and temperature revealed that MOB respond strongly to changing ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Rainer, Edda Marie |
author_facet |
Rainer, Edda Marie |
author_sort |
Rainer, Edda Marie |
title |
Response and resilience of the microbial methane filter to ecosystem changes in Arctic peatlands |
title_short |
Response and resilience of the microbial methane filter to ecosystem changes in Arctic peatlands |
title_full |
Response and resilience of the microbial methane filter to ecosystem changes in Arctic peatlands |
title_fullStr |
Response and resilience of the microbial methane filter to ecosystem changes in Arctic peatlands |
title_full_unstemmed |
Response and resilience of the microbial methane filter to ecosystem changes in Arctic peatlands |
title_sort |
response and resilience of the microbial methane filter to ecosystem changes in arctic peatlands |
publisher |
UiT The Arctic University of Norway |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/25384 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Climate change permafrost |
genre_facet |
Arctic Arctic Climate change permafrost |
op_relation |
Paper I: Rainer, E.M., Seppey, C.V.W., Tveit, A.T. & Svenning, M.M. (2020). Methanotroph populations and CH4 oxidation potentials in high-Arctic peat are altered by herbivory induced vegetation change. FEMS Microbiology Ecology, 96 (10), fiaa140. Also available in Munin at https://hdl.handle.net/10037/19936 . Paper II: Rainer, E.M., Seppey, C.V.W., Hammer, C., Svenning, M.M. & Tveit, A.T. (2021). The Influence of Above-Ground Herbivory on the Response of Arctic Soil Methanotrophs to Increasing CH 4 Concentrations and Temperatures. Microorganisms, 9 (10), 2080. Also available in Munin at https://hdl.handle.net/10037/23458 . Paper III: Tveit, A.T., Söllinger, A., Rainer, E.M., Didriksen, A., Hestnes, A.G., Motleleng, L., Hellinger, H.J., Rattei, T. & Svenning, M.M. Glycogen storage and ribosome regulation controls methanotroph temperature acclimation. (Manuscript). Now published as: Thermal acclimation of methanotrophs from the genus Methylobacter . ISME Journal , 2023, available at https://doi.org/10.1038/s41396-023-01363-7 . 978-82-8266-229-1 https://hdl.handle.net/10037/25384 |
op_rights |
Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2022 The Author(s) https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
_version_ |
1766300859817263104 |