Methane production and oxidation potentials along a fen-bog gradient from southern boreal to subarctic peatlands in Finland
Methane (CH4) emissions from northern peatlands are projected to increase due to climate change, primarily because of projected increases in soil temperature. Yet, the rates and temperature responses of the two CH4 emission-related microbial processes (CH4 production by methanogens and oxidation by...
Published in: | Global Change Biology |
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Wiley
2021
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Online Access: | http://hdl.handle.net/10138/333403 |
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/333403 |
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HELDA – University of Helsinki Open Repository |
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topic |
1172 Environmental sciences BOGS FENS global warming methane peat property production and oxidation temperature response vegetation 4112 Forestry 114 Physical sciences |
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1172 Environmental sciences BOGS FENS global warming methane peat property production and oxidation temperature response vegetation 4112 Forestry 114 Physical sciences Zhang, Hui Tuittila, Eeva-Stiina Korrensalo, Aino Laine, Anna M. Uljas, Salli Welti, Nina Kerttula, Johanna Maljanen, Marja Elliott, David Vesala, Timo Lohila, Annalea Methane production and oxidation potentials along a fen-bog gradient from southern boreal to subarctic peatlands in Finland |
topic_facet |
1172 Environmental sciences BOGS FENS global warming methane peat property production and oxidation temperature response vegetation 4112 Forestry 114 Physical sciences |
description |
Methane (CH4) emissions from northern peatlands are projected to increase due to climate change, primarily because of projected increases in soil temperature. Yet, the rates and temperature responses of the two CH4 emission-related microbial processes (CH4 production by methanogens and oxidation by methanotrophs) are poorly known. Further, peatland sites within a fen-bog gradient are known to differ in the variables that regulate these two mechanisms, yet the interaction between peatland type and temperature lacks quantitative understanding. Here, we investigated potential CH4 production and oxidation rates for 14 peatlands in Finland located between c. 60 and 70 degrees N latitude, representing bogs, poor fens, and rich fens. Potentials were measured at three different temperatures (5, 17.5, and 30celcius) using the laboratory incubation method. We linked CH4 production and oxidation patterns to their methanogen and methanotroph abundance, peat properties, and plant functional types. We found that the rich fen-bog gradient-related nutrient availability and methanogen abundance increased the temperature response of CH4 production, with rich fens exhibiting the greatest production potentials. Oxidation potential showed a steeper temperature response than production, which was explained by aerenchymous plant cover, peat water holding capacity, peat nitrogen, and sulfate content. The steeper temperature response of oxidation suggests that, at higher temperatures, CH4 oxidation might balance increased CH4 production. Predicting net CH4 fluxes as an outcome of the two mechanisms is complicated due to their different controls and temperature responses. The lack of correlation between field CH4 fluxes and production/oxidation potentials, and the positive correlation with aerenchymous plants points toward the essential role of CH4 transport for emissions. The scenario of drying peatlands under climate change, which is likely to promote Sphagnum establishment over brown mosses in many places, will potentially reduce the ... |
author2 |
Helsinki Institute of Sustainability Science (HELSUS) Environmental Change Research Unit (ECRU) Environmental Sciences Department of Physics Viikki Plant Science Centre (ViPS) Institute for Atmospheric and Earth System Research (INAR) Micrometeorology and biogeochemical cycles Ecosystem processes (INAR Forest Sciences) |
format |
Article in Journal/Newspaper |
author |
Zhang, Hui Tuittila, Eeva-Stiina Korrensalo, Aino Laine, Anna M. Uljas, Salli Welti, Nina Kerttula, Johanna Maljanen, Marja Elliott, David Vesala, Timo Lohila, Annalea |
author_facet |
Zhang, Hui Tuittila, Eeva-Stiina Korrensalo, Aino Laine, Anna M. Uljas, Salli Welti, Nina Kerttula, Johanna Maljanen, Marja Elliott, David Vesala, Timo Lohila, Annalea |
author_sort |
Zhang, Hui |
title |
Methane production and oxidation potentials along a fen-bog gradient from southern boreal to subarctic peatlands in Finland |
title_short |
Methane production and oxidation potentials along a fen-bog gradient from southern boreal to subarctic peatlands in Finland |
title_full |
Methane production and oxidation potentials along a fen-bog gradient from southern boreal to subarctic peatlands in Finland |
title_fullStr |
Methane production and oxidation potentials along a fen-bog gradient from southern boreal to subarctic peatlands in Finland |
title_full_unstemmed |
Methane production and oxidation potentials along a fen-bog gradient from southern boreal to subarctic peatlands in Finland |
title_sort |
methane production and oxidation potentials along a fen-bog gradient from southern boreal to subarctic peatlands in finland |
publisher |
Wiley |
publishDate |
2021 |
url |
http://hdl.handle.net/10138/333403 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_relation |
10.1111/gcb.15740 We thank Liisa Uljas for help with field work. Financial support from the Academy of Finland (projects 287039 and 258875) and ICOS‐Finland is acknowledged. TV acknowledges the grant from the Tyumen region, Russia, Government in accordance with the Program of the World‐Class West Siberian Interregional Scientific and Educational Center (National Project "Nauka"). AL acknowledges the Academy of Finland through Profi3 funding. AML acknowledges funding from the Kone foundation. We are grateful to the anonymous reviewers for their constructive comments. Zhang , H , Tuittila , E-S , Korrensalo , A , Laine , A M , Uljas , S , Welti , N , Kerttula , J , Maljanen , M , Elliott , D , Vesala , T & Lohila , A 2021 , ' Methane production and oxidation potentials along a fen-bog gradient from southern boreal to subarctic peatlands in Finland ' , Global Change Biology , vol. 27 , no. 18 , pp. 4449-4464 . https://doi.org/10.1111/gcb.15740 85112376447 e0be2434-24f6-48ea-b8ee-1116a1990375 http://hdl.handle.net/10138/333403 000667463500001 |
op_rights |
cc_by openAccess info:eu-repo/semantics/openAccess |
container_title |
Global Change Biology |
container_volume |
27 |
container_issue |
18 |
container_start_page |
4449 |
op_container_end_page |
4464 |
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1787428851399262208 |
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/333403 2024-01-07T09:46:55+01:00 Methane production and oxidation potentials along a fen-bog gradient from southern boreal to subarctic peatlands in Finland Zhang, Hui Tuittila, Eeva-Stiina Korrensalo, Aino Laine, Anna M. Uljas, Salli Welti, Nina Kerttula, Johanna Maljanen, Marja Elliott, David Vesala, Timo Lohila, Annalea Helsinki Institute of Sustainability Science (HELSUS) Environmental Change Research Unit (ECRU) Environmental Sciences Department of Physics Viikki Plant Science Centre (ViPS) Institute for Atmospheric and Earth System Research (INAR) Micrometeorology and biogeochemical cycles Ecosystem processes (INAR Forest Sciences) 2021-08-23T06:07:01Z 16 application/pdf http://hdl.handle.net/10138/333403 eng eng Wiley 10.1111/gcb.15740 We thank Liisa Uljas for help with field work. Financial support from the Academy of Finland (projects 287039 and 258875) and ICOS‐Finland is acknowledged. TV acknowledges the grant from the Tyumen region, Russia, Government in accordance with the Program of the World‐Class West Siberian Interregional Scientific and Educational Center (National Project "Nauka"). AL acknowledges the Academy of Finland through Profi3 funding. AML acknowledges funding from the Kone foundation. We are grateful to the anonymous reviewers for their constructive comments. Zhang , H , Tuittila , E-S , Korrensalo , A , Laine , A M , Uljas , S , Welti , N , Kerttula , J , Maljanen , M , Elliott , D , Vesala , T & Lohila , A 2021 , ' Methane production and oxidation potentials along a fen-bog gradient from southern boreal to subarctic peatlands in Finland ' , Global Change Biology , vol. 27 , no. 18 , pp. 4449-4464 . https://doi.org/10.1111/gcb.15740 85112376447 e0be2434-24f6-48ea-b8ee-1116a1990375 http://hdl.handle.net/10138/333403 000667463500001 cc_by openAccess info:eu-repo/semantics/openAccess 1172 Environmental sciences BOGS FENS global warming methane peat property production and oxidation temperature response vegetation 4112 Forestry 114 Physical sciences Article publishedVersion 2021 ftunivhelsihelda 2023-12-14T00:11:00Z Methane (CH4) emissions from northern peatlands are projected to increase due to climate change, primarily because of projected increases in soil temperature. Yet, the rates and temperature responses of the two CH4 emission-related microbial processes (CH4 production by methanogens and oxidation by methanotrophs) are poorly known. Further, peatland sites within a fen-bog gradient are known to differ in the variables that regulate these two mechanisms, yet the interaction between peatland type and temperature lacks quantitative understanding. Here, we investigated potential CH4 production and oxidation rates for 14 peatlands in Finland located between c. 60 and 70 degrees N latitude, representing bogs, poor fens, and rich fens. Potentials were measured at three different temperatures (5, 17.5, and 30celcius) using the laboratory incubation method. We linked CH4 production and oxidation patterns to their methanogen and methanotroph abundance, peat properties, and plant functional types. We found that the rich fen-bog gradient-related nutrient availability and methanogen abundance increased the temperature response of CH4 production, with rich fens exhibiting the greatest production potentials. Oxidation potential showed a steeper temperature response than production, which was explained by aerenchymous plant cover, peat water holding capacity, peat nitrogen, and sulfate content. The steeper temperature response of oxidation suggests that, at higher temperatures, CH4 oxidation might balance increased CH4 production. Predicting net CH4 fluxes as an outcome of the two mechanisms is complicated due to their different controls and temperature responses. The lack of correlation between field CH4 fluxes and production/oxidation potentials, and the positive correlation with aerenchymous plants points toward the essential role of CH4 transport for emissions. The scenario of drying peatlands under climate change, which is likely to promote Sphagnum establishment over brown mosses in many places, will potentially reduce the ... Article in Journal/Newspaper Subarctic HELDA – University of Helsinki Open Repository Global Change Biology 27 18 4449 4464 |