CO2 Fluxes from Different Vegetation Communities on a Peatland Ecosystem

0473955 - ÚVGZ 2018 RIV NL eng J - Článek v odborném periodiku
Acosta, Manuel - Juszczak, R. - Chojnicki, B. H. - Pavelka, Marian - Havránková, Kateřina - Leśny, J. - Krupková, Lenka - Urbaniak, M. - Macháčová, Kateřina - Olejnik, Janusz
CO2 Fluxes from Different Vegetation Communities on a Peatland Ecosystem.
Wetlands. Roč. 37, č. 3 (2017), s. 423-435. ISSN 0277-5212. E-ISSN 1943-6246
Grant CEP: GA MŠMT(CZ) LO1415
Výzkumná infrastruktura: CzeCOS II - 90061
Institucionální podpora: RVO:67179843
Klíčová slova: Chamber method * Ecosystem respiration * Net ecosystem exchange * Q10 – temperature sensitivity * LAI – leaf area index
Obor OECD: Environmental sciences (social aspects to be 5.7)
Impakt faktor: 1.811, rok: 2017

Although most studies find temperature, soil moisture and water table to be important environmental factors that affect peatland carbon dynamics, the role of vegetation communities has been investigated less. Therefore, this study investigates whether peatland ecosystems produce heterogeneous CO2 fluxes due to differences in vegetation community. In addition, the study also examines which major environmental factors influence this vegetation. To achieve the aims of this study, four sites with different vegetation communities were established in a semi-natural peatland ecosystem in Poland. CO2 flux measurements were carried out using a closed dynamic chamber system. Measurement campaigns were carried out from April until December 2008, every 2–3 weeks. Measured ecosystem respiration (Reco) and net ecosystem exchange (NEE) rates showed daily and seasonal variation at all investigated sites. Reco presented a strong dependence on soil temperature at the 5 cm depth, while NEE showed a strong dependence on solar radiation. The mean temperature sensitivity (Q10) for the four sites ranged between 3.17 and 8.3. The highest NEE and Reco values were obtained at the site represented by Caricetum elatae and the lowest NEE and Reco at the site represented by Calamagrostietum neglectae.
Trvalý link: http://hdl.handle.net/11104/0274408