Aktivitäten pro Jahr
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.
Originalsprache | Englisch |
---|---|
Aufsatznummer | 119907 |
Fachzeitschrift | Environmental Research |
Jahrgang | 262 |
Ausgabenummer | 2 |
DOIs | |
Publikationsstatus | Veröffentlicht - 1 Dez. 2024 |
ÖFOS 2012
- 105205 Klimawandel
- 106026 Ökosystemforschung
- 105904 Umweltforschung
- 105405 Geoökologie
-
Consequences of intense drought on CO2 & CH4 fluxes and evapotranspiration rates of the reed ecosystem at Lake Neusiedl
Pamela Alessandra Baur (Vortragende*r), Andreas Maier (Autor*in), Claudia Buchsteiner (Autor*in), Thomas Zechmeister (Autor*in) & Stephan Glatzel (Autor*in)
12 Sep. 2024Aktivität: Vorträge › Posterpräsentation › Science to Science
-
Carbon fluxes in the reed belt of Lake Neusiedl
Pamela Alessandra Baur (Vortragende*r)
28 Mai 2023Aktivität: Vorträge › Posterpräsentation › Science to Science
-
Carbon fluxes in the reed belt of Lake Neusiedl
Pamela Alessandra Baur (Autor*in), Andreas Maier (Vortragende*r), Thomas Zechmeister (Autor*in) & Stephan Glatzel (Autor*in)
10 Nov. 2022Aktivität: Vorträge › Posterpräsentation › Science to Science
Presseberichte
-
Wenn der Pegel sinkt: Ökosystemforschung am Neusiedler See
13/09/23
1 Objekt von Medienberichte
Presse/Medien: Forschung
-
#wetland Forschung: Was passiert, wenn der Schilfgürtel am #neusiedlersee austrocknet?
13/09/23
1 Objekt von Medienberichte
Presse/Medien: Forschung
-
Dürre verschiebt Kohlenstoff-Anteile im Neusiedler See-Schilfgürtel
8/09/22
1 Objekt von Medienberichte
Presse/Medien: Forschung
Publikationen
- 1 Sonstiges
-
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.Veröffentlichungen: Sonstige Veröffentlichung › Sonstiges
Open Access