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European beech is a net annual source of methane (CH4)
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SYSNO ASEP 0544693 Document Type A - Abstract R&D Document Type The record was not marked in the RIV R&D Document Type Není vybrán druh dokumentu Title European beech is a net annual source of methane (CH4) Author(s) Macháčová, Kateřina (UEK-B) RID, ORCID, SAI
Warlo, Hannes (UEK-B) ORCID, SAI, RID
Svobodová, Kateřina (UEK-B) SAI, RID
Agyei, Thomas (UEK-B) ORCID, SAI, RID
Uchytilová, Tereza (UEK-B) SAI
Horáček, Petr (UEK-B) RID, ORCID, SAI
Lang, F. (DE)Number of authors 7 Source Title EGU General Assembly 2021 (vEGU21: Gather Online). - Göttingen : European Geosciences Union, 2021 Number of pages 2 s. Action EGU General Assembly Conference 2021 Event date 19.04.2021 - 30.04.2021 VEvent location online Country DE - Germany Event type WRD Language eng - English Country DE - Germany Keywords methane ; fagus sylvatica ; exchange ; tree stem ; forest floor ; seasonal ; annual ; flux OECD category Plant sciences, botany R&D Projects GJ17-18112Y GA ČR - Czech Science Foundation (CSF) LO1415 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_019/0000797 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2015061 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UEK-B - RVO:86652079 DOI https://doi.org/10.5194/egusphere-egu21-4335 Annotation Trees are known to be sources of methane (CH4), an important greenhouse gas, into the atmosphere. However, still little is known about the seasonality of the tree stem CH4 fluxes, particularly for the dormant season, and about the impact of environmental parameters on this gas exchange. This makes the estimation of net annual ecosystem CH4 fluxes difficult. We determined seasonal dynamics of CH4 exchange of mature European beech stems (Fagus sylvatica) and of adjacent forest floor in a temperate montane forest of White Carpathians, Czech Republic, from November 2017 to December 2018. We used static chamber methods and gas chromatographic analyses. We aimed to understand the unknown role in seasonal changes of CH4 fluxes of these forests, and the spatiotemporal variability of the tree fluxes. The beech stems were net annual sources for atmospheric CH4, whereas the forest floor was a predominant sink for CH4. The stem CH4 emissions showed high inter-individual variability and clear seasonality following the stem CO2 efflux. The fluxes of CH4 peaked during the vegetation season, and remained low but significant to the annual totals during winter dormancy. By contrast, the forest floor CH4 uptake followed an opposite flux trend with low CH4 uptake detected in the winter dormant season and elevated CH4 uptake during the vegetation season. Based on our preliminary analyses, the detected high spatial variability in stem CH4 emissions can be explained neither by the CH4 exchange at the forest floor level, nor by soil CH4 concentrations, soil water content and soil temperature, all measured in vertical soil profiles close to the studied trees. European beech trees, native and widely spread species of Central Europe, seem to markedly contribute to the seasonal dynamics of the ecosystem CH4 exchange, and their CH4 fluxes should be included into forest greenhouse gas emission inventories. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2022
Number of the records: 1