Stems of Phragmites australis are buffering methane and carbon dioxide emissions

0574214 - ÚVGZ 2024 RIV NL eng J - Journal Article
Dušek, Jiří - Fausser, A. - Stellner, Stanislav - Kazda, M.
Stems of Phragmites australis are buffering methane and carbon dioxide emissions.
Science of the Total Environment. Roč. 882, JUL (2023), č. článku 163493. ISSN 0048-9697. E-ISSN 1879-1026
R&D Projects: GA MŠMT(CZ) LM2010007
Research Infrastructure: CzeCOS IV - 90248
Institutional support: RVO:86652079
Keywords : common reed * greenhouse gases * methane * carbon dioxide * oxygen * root traits
OECD category: Meteorology and atmospheric sciences
Impact factor: 9.8, year: 2022
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0048969723021125?via%3Dihub

Internal concentrations in the culm nodes of Phragmites australis and fluxes of methane (CH4) and carbon dioxide (CO2) were recorded in the treatment bed of constructed wetland (CW) with subsurface wastewater horizontal flow. Fluxes of CH4 and CO2 from the CW treatment bed were in ranges of 0 to 490 mu mol m-2 h-1 and from 0 to 4499 mu mol m-2h-1 for CH4 and CO2, respectively. The highest CH4 soil fluxes were recorded in the unvegetated coarse gravel inflow zone of the CW treatment bed. The nearby inflow zone exhibited the highest CO2 fluxes. Internal culm node concentrations of CH4 and CO2 were related to oxygen (O2) stem concentrations and environmental conditions during diurnal courses. The concentrations of CH4 and CO2 gases were significantly correlated and opposing O2 concentrations. Culm node parameters and shoot density of P. australis influenced internal gas concentrations and the buffering of CH4 and CO2 emissions. The effect of buffering CH4 emissions is distinctive in the outflow zone of the treatment bed and is less important in the highly polluted inflow zone of the CW. Buffering of CH4 and partially also CO2 emissions by stems of P. australis is a process which affects the diurnal dynamics of CH4 and CO2 fluxes from common reed wetlands.
Permanent Link: https://hdl.handle.net/11104/0344555