Počet záznamů: 1
Impact of water scarcity on spruce and beech forests
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SYSNO ASEP 0485305 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Impact of water scarcity on spruce and beech forests Tvůrce(i) Krupková, Lenka (UEK-B)
Havránková, Kateřina (UEK-B) RID, SAI
Krejza, Jan (UEK-B) RID, ORCID, SAI
Sedlák, Pavel (UEK-B) RID, ORCID, SAI
Marek, Michal V. (UEK-B) RID, ORCID, SAIZdroj.dok. Journal of Forestry Research - ISSN 1007-662X
Roč. 30, č. 3 (2019), s. 899-909Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. CN - Čína Klíč. slova Picea abies ; Fagus sylvatica ; Drought stress ; Hysteresis ; Eddy covariance Vědní obor RIV GK - Lesnictví Obor OECD Forestry CEP LO1415 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy LM2015061 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Výzkumná infrastruktura CzeCOS II - 90061 - Ústav výzkumu globální změny AV ČR, v. v. i. Způsob publikování Open access Institucionální podpora UEK-B - RVO:86652079 UT WOS 000466148600016 EID SCOPUS 85044716555 DOI https://doi.org/10.1007/s11676-018-0642-5 Anotace One of the greatest threats posed by ongoing climate change may be regarded the drought caused by changes in precipitation distribution. The aim of presented study was to characterize reactions to dry conditions and conditions without drought stress on gross primary production (GPP) and net ecosystem production (NEP) of spruce and beech forests, as these two species dominate within the European continent. Daily courses of GPP and NEP of these two species were evaluated in relation to an expected decrease in CO2 uptake during dry days. The occurrence of CO2 uptake hysteresis in daily production was also investigated. Our study was performed at Bílý Kříž (spruce) and Štítná (beech) mountain forest sites during 2010–2012 period. We applied eddy covariance technique for the estimation of carbon fluxes, vapor pressure deficit and precipitation characteristics together with the SoilClim model for the determination of drought conditions, and the inverse of the Penman–Monteith equation to compute canopy conductance. Significant differences were found in response to reduced water supply for both species. Spruce reacts by closing its stomata before noon and maintaining a reduced photosynthetic activity for the rest of the day, while beech keeps its stomata open as long as possible and slightly reduces photosynthetic activity evenly throughout the entire day. In the spruce forest, we found substantial hysteresis in the light response curve of GPP. In the beech forest, the shape of this curve was different: evening values exceeded morning values. Pracoviště Ústav výzkumu globální změny Kontakt Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Rok sběru 2020 Elektronická adresa https://www.researchgate.net/publication/324163255_Impact_of_water_scarcity_on_spruce_and_beech_forests
Počet záznamů: 1