Analysis of floodplain forest sensitivity to drought

0511528 - ÚVGZ 2020 AT eng A - Abstrakt
Kowalska, Natalia - Szatniewska, Justyna - Stojanović, Marko - Šigut, Ladislav - Pavelka, Marian
Analysis of floodplain forest sensitivity to drought.
Geophysical Research Abstracts. Vol. 21. European geoscience union, 2019.
[EGU General Assembly Conference 2019. 07.04.2019-12.04.2019, Vídeň]
Institucionální podpora: RVO:86652079
Klíčová slova: drought * eddy covariance * floodplain forest
Obor OECD: Forestry
https://meetingorganizer.copernicus.org/EGU2019/EGU2019-8151.pdf

Since a long time flooding occurs in Lnz very rarely, the last flooding event was in 2013. In addition, the site is hydrologically managed. Consequently, the water regime of the site changed over the years and represents nowadays relatively dry conditions for such type of ecosystem. Our main research goal is the evaluation of the floodplain forest sensitivity to drought at the Lanžhot site. Specifically, we plan to identify the sensitivity of the forest to drought regarding precipitation deficit, soil water potential, evapotranspiration demand, drought indices as well as the characteristics of forest Gross Primary Production (GPP), Ecosystem Respiration (Reco) and Net Ecosystem Exchange (NEE) in comparison with the average of a reference period. The recent fluxes of greenhouse gases will be derived via the eddy covariance technique. Our study will be supported by dendrochronological measurements, which will, in combination with sap flow analysis, provide information about drought stress according to e.g. tree water deficit (∆W). Furthermore,
dendrometer measurements can be used for deriving stem diameter variations and basal area increment (BAI, cm2). Thereafter, BAI and SF are the basis for computing the growth water use efficiency of each tree species (WUEBAI=BAI/Q). Finally, we would like to reconstruct historical diameter breast height from tree ring width data in order to have input data for calculating the biomass (carbon sequestration) of the two most common tree species in Lanžhot, namely oak and ash, based on allometric equations developed specifically for this location. Studying this ecosystem will give a chance to extend our knowledge about the behavior of floodplain forests under ongoing changing climate with drier conditions. We plan to connect historical information derived via dendrochronological methods with current data and compare the results with other published studies

Trvalý link: http://hdl.handle.net/11104/0301772