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Impact of Environmental Conditions and Seasonality on Ecosystem Transpiration and Evapotranspiration Partitioning (T/ET Ratio) of Pure European Beech Forest
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SYSNO ASEP 0563160 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Impact of Environmental Conditions and Seasonality on Ecosystem Transpiration and Evapotranspiration Partitioning (T/ET Ratio) of Pure European Beech Forest Author(s) Petrik, Peter (UEK-B) RID, ORCID, SAI
Zavadilová, Ina (UEK-B) RID, SAI, ORCID
Šigut, Ladislav (UEK-B) RID, ORCID, SAI
Kowalska, Natalia (UEK-B) SAI, ORCID, RID
Petek-Petrik, Anja (BU-J) ORCID, RID, SAI
Szatniewska, Justyna (UEK-B) SAI, RID, ORCID
Jocher, Georg (UEK-B) SAI, ORCID, RID
Pavelka, Marian (UEK-B) RID, ORCID, SAIArticle number 3015 Source Title Water. - : MDPI
Roč. 14, č. 19 (2022)Number of pages 17 s. Language eng - English Country CH - Switzerland Keywords Fagus sylvatica ; anisohydric ; ecohydrology ; sap flow ; eddy-covariance Subject RIV GK - Forestry OECD category Hydrology Subject RIV - cooperation Institute of Botany - Forestry R&D Projects LM2018123 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_019/0000797 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UEK-B - RVO:86652079 ; BU-J - RVO:67985939 UT WOS 000867321400001 EID SCOPUS 85139851707 DOI 10.3390/w14193015 Annotation Partitioning of evapotranspiration (ET) into transpiration (T) and residual evaporation (E) is a challenging but important task in order to assess the dynamics of increasingly scarce water resources in forest ecosystems. The T/ET ratio has been linked to the ecosystem water use efficiency of temperate forests, and thus is an important index for understanding utilization of water resources under global climate change. We used concurrent sap flow and eddy-covariance measurements to quantify the ET partitioning in pure European beech forest during the 2019-2020 period. The sap flow data were upscaled to stand level T and combined with stand level ET to calculate the T/ET ratio. We analysed intra-annual dynamics, the effect of seasonality and the impact of meteorological conditions on T, ET and T/ET. Annual T/ET of a pure European beech ecosystem was 0.48, falling at the lower end of reported global T/ET values for forest ecosystems. T/ET showed significant seasonal differences throughout spring (T/ET = 0.28), summer (T/ET = 0.62) and autumn (T/ET = 0.35). Air temperature (R-2 = 0.45-0.63), VPD (R-2 = 0.47-0.6) and PAR (R-2 = 0.32-0.63) affected the daily dynamics of T, ET and T/ET, however, soil water content (SWC) had no significant effect. Mature European beech trees showed more anisohydric behaviour and relatively stable T/ET, even under decreasing SWC. The results improve the understanding of ecosystem scale T, ET and T/ET intra-annual dynamics and environmental constraints in anisohydric mature European beech. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2023 Electronic address https://www.mdpi.com/2073-4441/14/19/3015
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