Activities per year
Abstract
Reed (Phragmites australis) dominated wetlands are commonly known as strong carbon (C) sinks due to the high productivity of the reed plant and C fixation in the wetland soil. However, little is known about the effects of drought on reed-dominated wetlands and the possibility of Pannonian reed ecosystems being a source of greenhouse gases (GHG). The drought at Lake Neusiedl had a particular impact on the water level, but also had consequences for the reed belt. Therefore, we investigated the drought-influenced C fluxes and their drivers in the reed ecosystem of this subsaline lake over a period of 4.5 years (mid-2018 to 2022). We applied eddy covariance technique to continuously quantify the vertical turbulent GHG exchange between reed belt & atmosphere and usedvegetation indices to account for reed growth. Methane emissions decreased by 76% from 9.2 g CH 4-C m -2a -1 (2019) to 2.2 g CH 4-C m -2 a -1 (2022), which can be explained by the falling water level, the associated drying out of the reed belt and its consequences. Carbon dioxide emissions initially decreased by 85% from 181 g CO 2-C m -2 a -1 (2019) to 27 g CO 2-C m -2 a -1 (2021), but then increased to twice the 2019 level in 2022 (391 g CO 2-C m -2 a -1). Due to the drying reed belt, the reed initially grew into formerly water-covered areas within the reed belt, especially in 2021, leading to higher photosynthesis through 2021. This development stopped and even reversed in 2022 as a consequence of the sharp decrease in sediment water content from about 65 to 32 Vol-% in mid-2022. Overall, drought led to a decoupling of the reed ecosystem from the open lake area and developed the wetland into a strong C source.
Original language | English |
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Article number | 119907 |
Journal | Environmental Research |
Volume | 262 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Dec 2024 |
Austrian Fields of Science 2012
- 105205 Climate change
- 106026 Ecosystem research
- 105904 Environmental research
- 105405 Geoecology
Keywords
- eddy covariance
- Phragmites australis
- wetland
- Greenhouse gas emission
- shallow lake
- subsaline
- reed
- CH4 fluxes
- CO2 fluxes
- LTER
- drought
- Subsaline
- Eddy covariance
- Shallow lake
- Wetland
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Dive into the research topics of 'Consequences of intense drought on CO2 and CH4 fluxes of the reed ecosystem at Lake Neusiedl'. Together they form a unique fingerprint.-
Auswirkungen der Trockenheit auf das Schilfökosystem des Neusiedlersees
Pamela Alessandra Baur (Speaker), Daniela Henry Pinilla (Contributor), Claudia Buchsteiner (Contributor), Andreas Maier (Contributor), Thomas Zechmeister (Contributor) & Stephan Glatzel (Contributor)
12 Nov 2024Activity: Talks and presentations › Talk or oral contribution › Science to Science
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Consequences of intense drought on CO2 & CH4 fluxes and evapotranspiration rates of the reed ecosystem at Lake Neusiedl
Pamela Alessandra Baur (Speaker), Andreas Maier (Contributor), Claudia Buchsteiner (Contributor), Thomas Zechmeister (Contributor) & Stephan Glatzel (Contributor)
12 Sept 2024Activity: Talks and presentations › Poster presentation › Science to Science
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Carbon fluxes in the reed belt of Lake Neusiedl
Pamela Alessandra Baur (Speaker)
28 May 2023Activity: Talks and presentations › Poster presentation › Science to Science
Press/Media
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Wenn der Pegel sinkt: Ökosystemforschung am Neusiedler See
13/09/23
1 item of Media coverage
Press/Media: Research
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#wetland Forschung: Was passiert, wenn der Schilfgürtel am #neusiedlersee austrocknet?
13/09/23
1 item of Media coverage
Press/Media: Research
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Dürre verschiebt Kohlenstoff-Anteile im Neusiedler See-Schilfgürtel
8/09/22
1 item of Media coverage
Press/Media: Research
Research output
- 1 Other
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Multi-year data set of CO2 fluxes, CH4 fluxes and environmental parameters of the wetland with reeds at Lake Neusiedl from mid-2018 to 2022
Baur, P. A., 2024, Open Access-Publikation im Repositorium Phaidra.Publications: Other publication › Other
Open Access