Controls of spatial and temporal variability in CH4 flux in a high arctic fen over three years
The aim of this study was to establish the main drivers of the spatial variability in growing season CH4 flux within an arctic wetland ecosystem. During 3 years (2011-2013) we measured CH4 flux and potential drivers, e.g., CO2 fluxes (net ecosystem exchange (NEE), gross primary productivity (GPP) an...
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ftulundlup:oai:lup.lub.lu.se:4d5f5561-6fc0-48bf-a89f-fc68b88843eb 2023-05-15T14:51:52+02:00 Controls of spatial and temporal variability in CH4 flux in a high arctic fen over three years Ström, Lena Falk, Julie Maria Skov, Kirstine Jackowicz-Korczynski, Marcin Mastepanov, Mikhail Christensen, Torben Lund, Magnus Schmidt, Niels Martin 2015 https://lup.lub.lu.se/record/7767723 https://doi.org/10.1007/s10533-015-0109-0 eng eng Springer https://lup.lub.lu.se/record/7767723 http://dx.doi.org/10.1007/s10533-015-0109-0 wos:000358598200003 scopus:84938290486 Biogeochemistry; 125(1), pp 21-35 (2015) ISSN: 1573-515X Physical Geography Arctic wetlands CH4 flux Eriophorum Spatial variability Substrate availability contributiontojournal/article info:eu-repo/semantics/article text 2015 ftulundlup https://doi.org/10.1007/s10533-015-0109-0 2023-02-01T23:29:35Z The aim of this study was to establish the main drivers of the spatial variability in growing season CH4 flux within an arctic wetland ecosystem. During 3 years (2011-2013) we measured CH4 flux and potential drivers, e.g., CO2 fluxes (net ecosystem exchange (NEE), gross primary productivity (GPP) and ecosystem respiration), temperature, water table depth, pore-water concentration of organic acids (e.g., acetate) and the vascular plant composition and density. The study included 16-20 main plots (C-main) and in 2013 also experimental plots (10 excluded muskoxen grazing, 9 snow fence and 10 automated chamber plots) distributed over 0.3 km(2). The results show a 1.8-times difference in CH4 flux magnitude inter-annually and 9- to 35-times spatially (depending on year and treatment). During all 3 years GPP was a strong driver of the variability in C-main plots. Accordingly, the plant productivity related variables NEE, GPP and acetate were singled out as the strongest drivers of the variability in 2013, when all variables were measured on a majority of the plots. These variables were equally strong drivers of the spatial variability in CH4 flux regardless of whether experimental plots were included in the analysis or not. The density of Eriophorum scheuchzeri was the strongest driver of the spatial variability in NEE, GPP and acetate. In conclusion, changes in vegetation composition or productivity of wet arctic ecosystems will have large impacts on their carbon balance and CH4 flux, irrespective of whether these changes are driven directly by climate change or by biotic interactions, such as grazing. Article in Journal/Newspaper Arctic Climate change Eriophorum Eriophorum scheuchzeri Lund University Publications (LUP) Arctic Biogeochemistry 125 1 21 35 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Physical Geography Arctic wetlands CH4 flux Eriophorum Spatial variability Substrate availability |
spellingShingle |
Physical Geography Arctic wetlands CH4 flux Eriophorum Spatial variability Substrate availability Ström, Lena Falk, Julie Maria Skov, Kirstine Jackowicz-Korczynski, Marcin Mastepanov, Mikhail Christensen, Torben Lund, Magnus Schmidt, Niels Martin Controls of spatial and temporal variability in CH4 flux in a high arctic fen over three years |
topic_facet |
Physical Geography Arctic wetlands CH4 flux Eriophorum Spatial variability Substrate availability |
description |
The aim of this study was to establish the main drivers of the spatial variability in growing season CH4 flux within an arctic wetland ecosystem. During 3 years (2011-2013) we measured CH4 flux and potential drivers, e.g., CO2 fluxes (net ecosystem exchange (NEE), gross primary productivity (GPP) and ecosystem respiration), temperature, water table depth, pore-water concentration of organic acids (e.g., acetate) and the vascular plant composition and density. The study included 16-20 main plots (C-main) and in 2013 also experimental plots (10 excluded muskoxen grazing, 9 snow fence and 10 automated chamber plots) distributed over 0.3 km(2). The results show a 1.8-times difference in CH4 flux magnitude inter-annually and 9- to 35-times spatially (depending on year and treatment). During all 3 years GPP was a strong driver of the variability in C-main plots. Accordingly, the plant productivity related variables NEE, GPP and acetate were singled out as the strongest drivers of the variability in 2013, when all variables were measured on a majority of the plots. These variables were equally strong drivers of the spatial variability in CH4 flux regardless of whether experimental plots were included in the analysis or not. The density of Eriophorum scheuchzeri was the strongest driver of the spatial variability in NEE, GPP and acetate. In conclusion, changes in vegetation composition or productivity of wet arctic ecosystems will have large impacts on their carbon balance and CH4 flux, irrespective of whether these changes are driven directly by climate change or by biotic interactions, such as grazing. |
format |
Article in Journal/Newspaper |
author |
Ström, Lena Falk, Julie Maria Skov, Kirstine Jackowicz-Korczynski, Marcin Mastepanov, Mikhail Christensen, Torben Lund, Magnus Schmidt, Niels Martin |
author_facet |
Ström, Lena Falk, Julie Maria Skov, Kirstine Jackowicz-Korczynski, Marcin Mastepanov, Mikhail Christensen, Torben Lund, Magnus Schmidt, Niels Martin |
author_sort |
Ström, Lena |
title |
Controls of spatial and temporal variability in CH4 flux in a high arctic fen over three years |
title_short |
Controls of spatial and temporal variability in CH4 flux in a high arctic fen over three years |
title_full |
Controls of spatial and temporal variability in CH4 flux in a high arctic fen over three years |
title_fullStr |
Controls of spatial and temporal variability in CH4 flux in a high arctic fen over three years |
title_full_unstemmed |
Controls of spatial and temporal variability in CH4 flux in a high arctic fen over three years |
title_sort |
controls of spatial and temporal variability in ch4 flux in a high arctic fen over three years |
publisher |
Springer |
publishDate |
2015 |
url |
https://lup.lub.lu.se/record/7767723 https://doi.org/10.1007/s10533-015-0109-0 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Eriophorum Eriophorum scheuchzeri |
genre_facet |
Arctic Climate change Eriophorum Eriophorum scheuchzeri |
op_source |
Biogeochemistry; 125(1), pp 21-35 (2015) ISSN: 1573-515X |
op_relation |
https://lup.lub.lu.se/record/7767723 http://dx.doi.org/10.1007/s10533-015-0109-0 wos:000358598200003 scopus:84938290486 |
op_doi |
https://doi.org/10.1007/s10533-015-0109-0 |
container_title |
Biogeochemistry |
container_volume |
125 |
container_issue |
1 |
container_start_page |
21 |
op_container_end_page |
35 |
_version_ |
1766323010457829376 |