Methane oxidation in contrasting soil types:responses to experimental warming with implication for landscape-integrated CH 4 budget
Arctic ecosystems are characterized by a wide range of soil moisture conditions and thermal regimes and contribute differently to the net methane (CH 4 ) budget. Yet, it is unclear how climate change will affect the capacity of those systems to act as a net source or sink of CH 4 . Here, we present...
Published in: | Global Change Biology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2017
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Online Access: | https://curis.ku.dk/portal/da/publications/methane-oxidation-in-contrasting-soil-types(450dec64-7f8e-478a-b803-8a0ac2726305).html https://doi.org/10.1111/gcb.13400 https://curis.ku.dk/ws/files/172272485/Methane_oxidation_in_contrasting_soil_types_responses_to_experimental_warming_with_implication_for_landscape_integrated_CH4_budget.pdf |
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ftcopenhagenunip:oai:pure.atira.dk:publications/450dec64-7f8e-478a-b803-8a0ac2726305 2023-07-23T04:17:28+02:00 Methane oxidation in contrasting soil types:responses to experimental warming with implication for landscape-integrated CH 4 budget D'Imperio, Ludovica Nielsen, Cecilie Skov Westergaard-Nielsen, Andreas Michelsen, Anders Elberling, Bo 2017 application/pdf https://curis.ku.dk/portal/da/publications/methane-oxidation-in-contrasting-soil-types(450dec64-7f8e-478a-b803-8a0ac2726305).html https://doi.org/10.1111/gcb.13400 https://curis.ku.dk/ws/files/172272485/Methane_oxidation_in_contrasting_soil_types_responses_to_experimental_warming_with_implication_for_landscape_integrated_CH4_budget.pdf eng eng info:eu-repo/semantics/openAccess D'Imperio , L , Nielsen , C S , Westergaard-Nielsen , A , Michelsen , A & Elberling , B 2017 , ' Methane oxidation in contrasting soil types : responses to experimental warming with implication for landscape-integrated CH 4 budget ' , Global Change Biology , vol. 23 , no. 2 , pp. 966-976 . https://doi.org/10.1111/gcb.13400 Arctic bare soil dry heath Greenland methane budget methane uptake soil moisture warming article 2017 ftcopenhagenunip https://doi.org/10.1111/gcb.13400 2023-07-05T23:01:19Z Arctic ecosystems are characterized by a wide range of soil moisture conditions and thermal regimes and contribute differently to the net methane (CH 4 ) budget. Yet, it is unclear how climate change will affect the capacity of those systems to act as a net source or sink of CH 4 . Here, we present results of in situ CH 4 flux measurements made during the growing season 2014 on Disko Island (west Greenland) and quantify the contribution of contrasting soil and landscape types to the net CH 4 budget and responses to summer warming. We compared gas flux measurements from a bare soil and a dry heath, at ambient conditions and increased air temperature, using open-top chambers (OTCs). Throughout the growing season, bare soil consumed 0.22 ± 0.03 g CH 4 -C m −2 (8.1 ± 1.2 g CO 2 -eq m −2 ) at ambient conditions, while the dry heath consumed 0.10 ± 0.02 g CH 4 -C m −2 (3.9 ± 0.6 g CO 2 -eq m −2 ). These uptake rates were subsequently scaled to the entire study area of 0.15 km 2 , a landscape also consisting of wetlands with a seasonally integrated methane release of 0.10 ± 0.01 g CH 4 -C m −2 (3.7 ± 1.2 g CO 2 -eq m −2 ). The result was a net landscape sink of 12.71 kg CH 4 -C (0.48 tonne CO 2 -eq) during the growing season. A nonsignificant trend was noticed in seasonal CH 4 uptake rates with experimental warming, corresponding to a 2% reduction at the bare soil, and 33% increase at the dry heath. This was due to the indirect effect of OTCs on soil moisture, which exerted the main control on CH 4 fluxes. Overall, the net landscape sink of CH 4 tended to increase by 20% with OTCs. Bare and dry tundra ecosystems should be considered in the net CH 4 budget of the Arctic due to their potential role in counterbalancing CH 4 emissions from wetlands – not the least when taking the future climatic scenarios of the Arctic into account. Article in Journal/Newspaper Arctic Climate change Greenland Tundra University of Copenhagen: Research Arctic Greenland Global Change Biology 23 2 966 976 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
Arctic bare soil dry heath Greenland methane budget methane uptake soil moisture warming |
spellingShingle |
Arctic bare soil dry heath Greenland methane budget methane uptake soil moisture warming D'Imperio, Ludovica Nielsen, Cecilie Skov Westergaard-Nielsen, Andreas Michelsen, Anders Elberling, Bo Methane oxidation in contrasting soil types:responses to experimental warming with implication for landscape-integrated CH 4 budget |
topic_facet |
Arctic bare soil dry heath Greenland methane budget methane uptake soil moisture warming |
description |
Arctic ecosystems are characterized by a wide range of soil moisture conditions and thermal regimes and contribute differently to the net methane (CH 4 ) budget. Yet, it is unclear how climate change will affect the capacity of those systems to act as a net source or sink of CH 4 . Here, we present results of in situ CH 4 flux measurements made during the growing season 2014 on Disko Island (west Greenland) and quantify the contribution of contrasting soil and landscape types to the net CH 4 budget and responses to summer warming. We compared gas flux measurements from a bare soil and a dry heath, at ambient conditions and increased air temperature, using open-top chambers (OTCs). Throughout the growing season, bare soil consumed 0.22 ± 0.03 g CH 4 -C m −2 (8.1 ± 1.2 g CO 2 -eq m −2 ) at ambient conditions, while the dry heath consumed 0.10 ± 0.02 g CH 4 -C m −2 (3.9 ± 0.6 g CO 2 -eq m −2 ). These uptake rates were subsequently scaled to the entire study area of 0.15 km 2 , a landscape also consisting of wetlands with a seasonally integrated methane release of 0.10 ± 0.01 g CH 4 -C m −2 (3.7 ± 1.2 g CO 2 -eq m −2 ). The result was a net landscape sink of 12.71 kg CH 4 -C (0.48 tonne CO 2 -eq) during the growing season. A nonsignificant trend was noticed in seasonal CH 4 uptake rates with experimental warming, corresponding to a 2% reduction at the bare soil, and 33% increase at the dry heath. This was due to the indirect effect of OTCs on soil moisture, which exerted the main control on CH 4 fluxes. Overall, the net landscape sink of CH 4 tended to increase by 20% with OTCs. Bare and dry tundra ecosystems should be considered in the net CH 4 budget of the Arctic due to their potential role in counterbalancing CH 4 emissions from wetlands – not the least when taking the future climatic scenarios of the Arctic into account. |
format |
Article in Journal/Newspaper |
author |
D'Imperio, Ludovica Nielsen, Cecilie Skov Westergaard-Nielsen, Andreas Michelsen, Anders Elberling, Bo |
author_facet |
D'Imperio, Ludovica Nielsen, Cecilie Skov Westergaard-Nielsen, Andreas Michelsen, Anders Elberling, Bo |
author_sort |
D'Imperio, Ludovica |
title |
Methane oxidation in contrasting soil types:responses to experimental warming with implication for landscape-integrated CH 4 budget |
title_short |
Methane oxidation in contrasting soil types:responses to experimental warming with implication for landscape-integrated CH 4 budget |
title_full |
Methane oxidation in contrasting soil types:responses to experimental warming with implication for landscape-integrated CH 4 budget |
title_fullStr |
Methane oxidation in contrasting soil types:responses to experimental warming with implication for landscape-integrated CH 4 budget |
title_full_unstemmed |
Methane oxidation in contrasting soil types:responses to experimental warming with implication for landscape-integrated CH 4 budget |
title_sort |
methane oxidation in contrasting soil types:responses to experimental warming with implication for landscape-integrated ch 4 budget |
publishDate |
2017 |
url |
https://curis.ku.dk/portal/da/publications/methane-oxidation-in-contrasting-soil-types(450dec64-7f8e-478a-b803-8a0ac2726305).html https://doi.org/10.1111/gcb.13400 https://curis.ku.dk/ws/files/172272485/Methane_oxidation_in_contrasting_soil_types_responses_to_experimental_warming_with_implication_for_landscape_integrated_CH4_budget.pdf |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Climate change Greenland Tundra |
genre_facet |
Arctic Climate change Greenland Tundra |
op_source |
D'Imperio , L , Nielsen , C S , Westergaard-Nielsen , A , Michelsen , A & Elberling , B 2017 , ' Methane oxidation in contrasting soil types : responses to experimental warming with implication for landscape-integrated CH 4 budget ' , Global Change Biology , vol. 23 , no. 2 , pp. 966-976 . https://doi.org/10.1111/gcb.13400 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/gcb.13400 |
container_title |
Global Change Biology |
container_volume |
23 |
container_issue |
2 |
container_start_page |
966 |
op_container_end_page |
976 |
_version_ |
1772179225981222912 |