Greenhouse gas emissions from two rewetted peatlands previously managed for forestry
The aim of this study was to investigate the controls on carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) dynamics on a blanket bog (at Pollagoona) and a raised bog (at Scohaboy) in Ireland after felling of plantation forestry and rewetting, and to produce annual balances for each gas at...
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International Mire Conservation Group and International Peatland Society
2018-12-01
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| Series: | Mires and Peat |
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| Online Access: | http://mires-and-peat.net/media/map21/map_21_24.pdf |
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| author | C. Rigney D. Wilson F. Renou-Wilson C. Müller G. Moser K.A. Byrne |
| author_facet | C. Rigney D. Wilson F. Renou-Wilson C. Müller G. Moser K.A. Byrne |
| author_sort | C. Rigney |
| collection | DOAJ |
| description | The aim of this study was to investigate the controls on carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) dynamics on a blanket bog (at Pollagoona) and a raised bog (at Scohaboy) in Ireland after felling of plantation forestry and rewetting, and to produce annual balances for each gas at both sites. Gas fluxes were measured during a twelve-month period using the chamber method. Microsite types reflecting the dominant plant species at the chamber plots were identified and classified as Eriophorum-Sphagnum, Cladonia-Calluna and Molinia at Pollagoona and Eriophorum-Sphagnum, Cladonia-mosses, Eriophorum and brash (logging residues) at Scohaboy. The relationships between gas fluxes and environmental variables were assessed, and regression models were used to estimate annual CO2 and CH4 gas balances for each microsite type. Annual estimates of N2O exchange were calculated using seasonal means. Over the course of the study both sites acted as CO2 and CH4 sources. Although Pollagoona was an overall net source of CO2-C (131.6 ± 298.3 g m-2 yr-1), one microsite type (Cladonia-Calluna) acted as a strong sink for CO2-C (-142.8 g m-2 yr-1). Molinia microsites exhibited the highest CH4-C emissions (2.53 ± 1.01 g m-2 yr-1). Nitrous oxide emissions at Pollagoona were calculated as 12 μg m-2 yr-1. Scohaboy acted as a large CO2-C source (585.3 ± 241.5 g m-2 yr 1) (all microsite types) despite re-vegetation of non-brash plots, due to the availability of fresh organic matter across the site. Scohaboy was also a CH4-C source, emitting 3.25 ± 0.58 g m-2 yr-1. Emissions of both CO2-C (819.31 ± 57.7 g m-2 yr-1) and CH4-C (4.76 ± 0.98 g m-2 yr-1) were highest from the brash plots. Annual N2O-N emissions were small over the study period (72 µg m-2 yr-1). Our results indicate that, despite remedial work being conducted on both peatlands to raise the water table, the C sink function has not yet been restored at either site. |
| first_indexed | 2024-03-12T19:12:23Z |
| format | Article |
| id | doaj.art-b3347d40f8c8449c905c94b74f197279 |
| institution | Directory Open Access Journal |
| issn | 1819-754X |
| language | English |
| last_indexed | 2024-03-12T19:12:23Z |
| publishDate | 2018-12-01 |
| publisher | International Mire Conservation Group and International Peatland Society |
| record_format | Article |
| series | Mires and Peat |
| spelling | doaj.art-b3347d40f8c8449c905c94b74f1972792023-08-02T05:50:22ZengInternational Mire Conservation Group and International Peatland SocietyMires and Peat1819-754X2018-12-01212412310.19189/MaP.2017.OMB.314Greenhouse gas emissions from two rewetted peatlands previously managed for forestryC. Rigney0D. Wilson1F. Renou-Wilson2C. Müller3G. Moser4K.A. Byrne5Department of Biological Sciences, School of Natural Sciences, University of Limerick, IrelandEarthy Matters Environmental Consultants, Donegal, IrelandF. Renou-WilsonInstitute for Plant Ecology, Justus Liebig University, Giessen, GermanyInstitute for Plant Ecology, Justus Liebig University, Giessen, GermanyDepartment of Biological Sciences, School of Natural Sciences, University of Limerick, IrelandThe aim of this study was to investigate the controls on carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) dynamics on a blanket bog (at Pollagoona) and a raised bog (at Scohaboy) in Ireland after felling of plantation forestry and rewetting, and to produce annual balances for each gas at both sites. Gas fluxes were measured during a twelve-month period using the chamber method. Microsite types reflecting the dominant plant species at the chamber plots were identified and classified as Eriophorum-Sphagnum, Cladonia-Calluna and Molinia at Pollagoona and Eriophorum-Sphagnum, Cladonia-mosses, Eriophorum and brash (logging residues) at Scohaboy. The relationships between gas fluxes and environmental variables were assessed, and regression models were used to estimate annual CO2 and CH4 gas balances for each microsite type. Annual estimates of N2O exchange were calculated using seasonal means. Over the course of the study both sites acted as CO2 and CH4 sources. Although Pollagoona was an overall net source of CO2-C (131.6 ± 298.3 g m-2 yr-1), one microsite type (Cladonia-Calluna) acted as a strong sink for CO2-C (-142.8 g m-2 yr-1). Molinia microsites exhibited the highest CH4-C emissions (2.53 ± 1.01 g m-2 yr-1). Nitrous oxide emissions at Pollagoona were calculated as 12 μg m-2 yr-1. Scohaboy acted as a large CO2-C source (585.3 ± 241.5 g m-2 yr 1) (all microsite types) despite re-vegetation of non-brash plots, due to the availability of fresh organic matter across the site. Scohaboy was also a CH4-C source, emitting 3.25 ± 0.58 g m-2 yr-1. Emissions of both CO2-C (819.31 ± 57.7 g m-2 yr-1) and CH4-C (4.76 ± 0.98 g m-2 yr-1) were highest from the brash plots. Annual N2O-N emissions were small over the study period (72 µg m-2 yr-1). Our results indicate that, despite remedial work being conducted on both peatlands to raise the water table, the C sink function has not yet been restored at either site.http://mires-and-peat.net/media/map21/map_21_24.pdfblanket bogcarbon dioxidemethanenitrous oxideraised bogrewetting |
| spellingShingle | C. Rigney D. Wilson F. Renou-Wilson C. Müller G. Moser K.A. Byrne Greenhouse gas emissions from two rewetted peatlands previously managed for forestry Mires and Peat blanket bog carbon dioxide methane nitrous oxide raised bog rewetting |
| title | Greenhouse gas emissions from two rewetted peatlands previously managed for forestry |
| title_full | Greenhouse gas emissions from two rewetted peatlands previously managed for forestry |
| title_fullStr | Greenhouse gas emissions from two rewetted peatlands previously managed for forestry |
| title_full_unstemmed | Greenhouse gas emissions from two rewetted peatlands previously managed for forestry |
| title_short | Greenhouse gas emissions from two rewetted peatlands previously managed for forestry |
| title_sort | greenhouse gas emissions from two rewetted peatlands previously managed for forestry |
| topic | blanket bog carbon dioxide methane nitrous oxide raised bog rewetting |
| url | http://mires-and-peat.net/media/map21/map_21_24.pdf |
| work_keys_str_mv | AT crigney greenhousegasemissionsfromtworewettedpeatlandspreviouslymanagedforforestry AT dwilson greenhousegasemissionsfromtworewettedpeatlandspreviouslymanagedforforestry AT frenouwilson greenhousegasemissionsfromtworewettedpeatlandspreviouslymanagedforforestry AT cmuller greenhousegasemissionsfromtworewettedpeatlandspreviouslymanagedforforestry AT gmoser greenhousegasemissionsfromtworewettedpeatlandspreviouslymanagedforforestry AT kabyrne greenhousegasemissionsfromtworewettedpeatlandspreviouslymanagedforforestry |