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Article

Methane and Nitrous Oxide Emission Fluxes Along Water Level Gradients in Littoral Zones of Constructed Surface Water Bodies in a Rewetted Extracted Peatland in Sweden

1
Swedish University of Agricultural Sciences, Department of Soil and Environment, P.O. Box 7014, SE-750 07 Uppsala, Sweden
2
Institute of Ecology, School of Natural Sciences and Health, Tallinn University, Uus Sadama 5, EE-101 20 Tallinn, Estonia
*
Author to whom correspondence should be addressed.
Soil Syst. 2020, 4(1), 17; https://doi.org/10.3390/soilsystems4010017
Received: 20 January 2020 / Revised: 18 March 2020 / Accepted: 19 March 2020 / Published: 24 March 2020
Rewetted extracted peatlands are sensitive ecosystems and they can act as greenhouse gas (GHG) sinks or sources due to changes in hydrology, vegetation, and weather conditions. However, studies on GHG emissions from extracted peatlands after rewetting are limited. Methane (CH4) and nitrous oxide (N2O) emission fluxes were determined using the opaque closed chamber method along water level gradients from littoral zones to the open water body of constructed shallow lakes with different vegetation zones in a nutrient-rich rewetted extracted peatland in Sweden. Vegetation communities and their position relative to water level, together with short-term water level fluctuations, such as inundation events and seasonal droughts, and temperature had a significant impact on CH4 emissions fluxes. During “normal” and “dry” conditions and high soil temperatures, CH4 emissions were highest from Carex spp.-Typha latifolia L. communities. During inundation events with water levels > 30 cm, sites with flooded Graminoids-Scirpus spp.-Carex spp. emitted most CH4. Methane emissions from the water body of the constructed shallow lakes were low during all water level conditions and over the temperature ranges observed. Nitrous oxide emissions contributed little to the emission fluxes from the soil-plant-water systems to the atmosphere, and they were only detectable from the sites with Graminoids. In terms of management, the construction of shallow lakes showed great potential for lowering GHG emission fluxes from nutrient rich peatlands after peat extraction, even though the vegetated shore emitted some N2O and CH4. View Full-Text
Keywords: greenhouse gas mitigation; nutrient-rich peatland; post-extraction landform; vegetation communities; wetland restoration greenhouse gas mitigation; nutrient-rich peatland; post-extraction landform; vegetation communities; wetland restoration
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MDPI and ACS Style

Jordan, S.; Strömgren, M.; Fiedler, J.; Lode, E.; Nilsson, T.; Lundin, L. Methane and Nitrous Oxide Emission Fluxes Along Water Level Gradients in Littoral Zones of Constructed Surface Water Bodies in a Rewetted Extracted Peatland in Sweden. Soil Syst. 2020, 4, 17. https://doi.org/10.3390/soilsystems4010017

AMA Style

Jordan S, Strömgren M, Fiedler J, Lode E, Nilsson T, Lundin L. Methane and Nitrous Oxide Emission Fluxes Along Water Level Gradients in Littoral Zones of Constructed Surface Water Bodies in a Rewetted Extracted Peatland in Sweden. Soil Systems. 2020; 4(1):17. https://doi.org/10.3390/soilsystems4010017

Chicago/Turabian Style

Jordan, Sabine; Strömgren, Monika; Fiedler, Jan; Lode, Elve; Nilsson, Torbjörn; Lundin, Lars. 2020. "Methane and Nitrous Oxide Emission Fluxes Along Water Level Gradients in Littoral Zones of Constructed Surface Water Bodies in a Rewetted Extracted Peatland in Sweden" Soil Syst. 4, no. 1: 17. https://doi.org/10.3390/soilsystems4010017

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