Initial effects of post-harvest ditch cleaning on greenhouse gas fluxes in a hemiboreal peatland forest
Ditch cleaning (DC) is a well-established forestry practice across Fennoscandia to lower water table levels (WTL) and thereby facilitate the establishment of tree seedlings following clear-cutting. However, the implications from these activities for ecosystem-atmosphere greenhouse gas (GHG) exchange...
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ftslunivuppsala:oai:pub.epsilon.slu.se:29482 2023-05-15T16:12:17+02:00 Initial effects of post-harvest ditch cleaning on greenhouse gas fluxes in a hemiboreal peatland forest Tong, Cheuk Hei Marcus Nilsson, Mats Sikstrom, Ulf Ring, Eva Drott, Andreas Eklöf, Karin Futter, Martyn Peacock, Michael Segersten, Joel Peichl, Matthias 2022 application/pdf https://pub.epsilon.slu.se/29482/ https://pub.epsilon.slu.se/29482/1/tong-c-h-m-et-al-20221109.pdf en eng eng https://pub.epsilon.slu.se/29482/1/tong-c-h-m-et-al-20221109.pdf Tong, Cheuk Hei Marcus and Nilsson, Mats and Sikstrom, Ulf and Ring, Eva and Drott, Andreas and Eklöf, Karin and Futter, Martyn and Peacock, Michael and Segersten, Joel and Peichl, Matthias (2022). Initial effects of post-harvest ditch cleaning on greenhouse gas fluxes in a hemiboreal peatland forest. Geoderma. 426 , 116055 [Research article] Environmental Sciences related to Agriculture and Land-use Forest Science Climate Research Research article NonPeerReviewed 2022 ftslunivuppsala 2022-11-10T17:13:50Z Ditch cleaning (DC) is a well-established forestry practice across Fennoscandia to lower water table levels (WTL) and thereby facilitate the establishment of tree seedlings following clear-cutting. However, the implications from these activities for ecosystem-atmosphere greenhouse gas (GHG) exchanges are poorly understood at present. We assessed the initial DC effects on the GHG fluxes in a forest clear-cut on a drained fertile peatland in hemiboreal Sweden, by comparing chamber measurements of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) fluxes from soil and ditches in DC and uncleaned (UC) areas over the first two post-harvest years. We also evaluated spatial effects by comparing fluxes at 4 m and 40 m from ditches. We found that 2 years after DC, mean (+/- standard error) WTL of-65 +/- 2 cm was significantly lower in the DC area compared to-56 +/- 2 cm in the UC area. We further observed lower gross primary production and ecosystem respiration in the first year after DC which coincided with delayed development of herbaceous ground vegetation. We also found higher CH4 uptake but no difference in N2O fluxes after DC. Greater CH4 uptake occurred at 4 m compared to 40 m away from both cleaned and uncleaned ditches. Model extrapolation suggests that total annual GHG emissions in the second year were reduced from 49.4 +/- 17.0 t-CO2-eq-ha(-1) -year(-1) in the UC area to 27.8 +/- 10.3 t-CO2-eq-ha(-1) -year(-1) in the DC area. A flux partitioning approach suggested that this was likely caused by decreased heterotrophic respiration, possibly because of enhanced soil dryness following DC during the dry meteorological conditions. CH(4 )and N2O fluxes from clear-cut areas contributed < 2 % to the total (soil, ditches) GHG budget. Similarly the area -weighted contributions by CO2 and CH4 emissions from both cleaned and uncleaned ditches were < 2 %. Thus, our study highlights that DC may considerably alter the post-harvest GHG fluxes of drained peatland forests. However, long-term observations under ... Article in Journal/Newspaper Fennoscandia Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive |
institution |
Open Polar |
collection |
Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive |
op_collection_id |
ftslunivuppsala |
language |
English |
topic |
Environmental Sciences related to Agriculture and Land-use Forest Science Climate Research |
spellingShingle |
Environmental Sciences related to Agriculture and Land-use Forest Science Climate Research Tong, Cheuk Hei Marcus Nilsson, Mats Sikstrom, Ulf Ring, Eva Drott, Andreas Eklöf, Karin Futter, Martyn Peacock, Michael Segersten, Joel Peichl, Matthias Initial effects of post-harvest ditch cleaning on greenhouse gas fluxes in a hemiboreal peatland forest |
topic_facet |
Environmental Sciences related to Agriculture and Land-use Forest Science Climate Research |
description |
Ditch cleaning (DC) is a well-established forestry practice across Fennoscandia to lower water table levels (WTL) and thereby facilitate the establishment of tree seedlings following clear-cutting. However, the implications from these activities for ecosystem-atmosphere greenhouse gas (GHG) exchanges are poorly understood at present. We assessed the initial DC effects on the GHG fluxes in a forest clear-cut on a drained fertile peatland in hemiboreal Sweden, by comparing chamber measurements of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) fluxes from soil and ditches in DC and uncleaned (UC) areas over the first two post-harvest years. We also evaluated spatial effects by comparing fluxes at 4 m and 40 m from ditches. We found that 2 years after DC, mean (+/- standard error) WTL of-65 +/- 2 cm was significantly lower in the DC area compared to-56 +/- 2 cm in the UC area. We further observed lower gross primary production and ecosystem respiration in the first year after DC which coincided with delayed development of herbaceous ground vegetation. We also found higher CH4 uptake but no difference in N2O fluxes after DC. Greater CH4 uptake occurred at 4 m compared to 40 m away from both cleaned and uncleaned ditches. Model extrapolation suggests that total annual GHG emissions in the second year were reduced from 49.4 +/- 17.0 t-CO2-eq-ha(-1) -year(-1) in the UC area to 27.8 +/- 10.3 t-CO2-eq-ha(-1) -year(-1) in the DC area. A flux partitioning approach suggested that this was likely caused by decreased heterotrophic respiration, possibly because of enhanced soil dryness following DC during the dry meteorological conditions. CH(4 )and N2O fluxes from clear-cut areas contributed < 2 % to the total (soil, ditches) GHG budget. Similarly the area -weighted contributions by CO2 and CH4 emissions from both cleaned and uncleaned ditches were < 2 %. Thus, our study highlights that DC may considerably alter the post-harvest GHG fluxes of drained peatland forests. However, long-term observations under ... |
format |
Article in Journal/Newspaper |
author |
Tong, Cheuk Hei Marcus Nilsson, Mats Sikstrom, Ulf Ring, Eva Drott, Andreas Eklöf, Karin Futter, Martyn Peacock, Michael Segersten, Joel Peichl, Matthias |
author_facet |
Tong, Cheuk Hei Marcus Nilsson, Mats Sikstrom, Ulf Ring, Eva Drott, Andreas Eklöf, Karin Futter, Martyn Peacock, Michael Segersten, Joel Peichl, Matthias |
author_sort |
Tong, Cheuk Hei Marcus |
title |
Initial effects of post-harvest ditch cleaning on greenhouse gas fluxes in a hemiboreal peatland forest |
title_short |
Initial effects of post-harvest ditch cleaning on greenhouse gas fluxes in a hemiboreal peatland forest |
title_full |
Initial effects of post-harvest ditch cleaning on greenhouse gas fluxes in a hemiboreal peatland forest |
title_fullStr |
Initial effects of post-harvest ditch cleaning on greenhouse gas fluxes in a hemiboreal peatland forest |
title_full_unstemmed |
Initial effects of post-harvest ditch cleaning on greenhouse gas fluxes in a hemiboreal peatland forest |
title_sort |
initial effects of post-harvest ditch cleaning on greenhouse gas fluxes in a hemiboreal peatland forest |
publishDate |
2022 |
url |
https://pub.epsilon.slu.se/29482/ https://pub.epsilon.slu.se/29482/1/tong-c-h-m-et-al-20221109.pdf |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_relation |
https://pub.epsilon.slu.se/29482/1/tong-c-h-m-et-al-20221109.pdf Tong, Cheuk Hei Marcus and Nilsson, Mats and Sikstrom, Ulf and Ring, Eva and Drott, Andreas and Eklöf, Karin and Futter, Martyn and Peacock, Michael and Segersten, Joel and Peichl, Matthias (2022). Initial effects of post-harvest ditch cleaning on greenhouse gas fluxes in a hemiboreal peatland forest. Geoderma. 426 , 116055 [Research article] |
_version_ |
1765997559260643328 |