Počet záznamů: 1
Seasonally varying relationship between stem respiration, increment and carbon allocation of Norway spruce trees
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SYSNO ASEP 0525533 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Seasonally varying relationship between stem respiration, increment and carbon allocation of Norway spruce trees Tvůrce(i) Dařenová, Eva (UEK-B) RID, ORCID, SAI
Horáček, Petr (UEK-B) RID, ORCID, SAI
Krejza, Jan (UEK-B) RID, ORCID, SAI
Pokorný, R. (CZ)
Pavelka, Marian (UEK-B) RID, ORCID, SAICelkový počet autorů 5 Zdroj.dok. Tree Physiology - ISSN 0829-318X
Roč. 40, č. 7 (2020), s. 943-955Poč.str. 13 s. Jazyk dok. eng - angličtina Země vyd. CA - Kanada Klíč. slova Picea abies ; carbon allocation ; CO2 efflux ; growth respiration ; maintenance respiration ; mature tissue method ; sri 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 III - 90123 - Ústav výzkumu globální změny AV ČR, v. v. i. Způsob publikování Omezený přístup Institucionální podpora UEK-B - RVO:86652079 UT WOS 000591566200010 EID SCOPUS 85087466538 DOI 10.1093/treephys/tpaa039 Anotace Stem respiration is an important component of an ecosystem's carbon budget. Beside environmental factors, it depends highly on tree energy demands for stem growth. Determination of the relationship between stem growth and stem respiration would help to reveal the response of stem respiration to changing climate, which is expected to substantially affect tree growth. Common measurement of stem radial increment does not record all aspects of stem growth processes, especially those connected with cell wall thickening, therefore, the relationship between stem respiration and stem radial increment may vary depending on the wood cell growth differentiation phase. This study presents results from measurements of stem respiration and increment carried out for seven growing seasons in a young Norway spruce forest. Moreover, rates of carbon allocation to stems were modeled for these years. Stem respiration was divided into maintenance (Rm) and growth respiration (Rg) based upon the mature tissue method. There was a close relationship between Rg and daily stem radial increment (dSRI), and this relationship differed before and after dSRI seasonal maximum, which was around 19 June. Before this date, Rg increased exponentially with dSRI, while after this date logarithmically. This is a result of later maxima of Rg and its slower decrease when compared with dSRI, which is connected with energy demands for cell wall thickening. Rg reached a maxima at the end of June or in July. The maximum of carbon allocation to stem peaked in late summer, when Rg mostly tended to decrease. The overall contribution of Rg to stem CO2 efflux amounted to 46.9% for the growing period from May to September and 38.2% for the year as a whole. This study shows that further deeper analysis of in situ stem growth and stem respiration dynamics is greatly needed, especially with a focus on wood formation on a cell level. Pracoviště Ústav výzkumu globální změny Kontakt Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Rok sběru 2021 Elektronická adresa https://academic.oup.com/treephys/article-abstract/40/7/943/5817961?redirectedFrom=fulltext
Počet záznamů: 1