Predicting light use efficiency using optical vegetation indices at various time scales and environmental conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F17%3A00485228" target="_blank" >RIV/86652079:_____/17:00485228 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Predicting light use efficiency using optical vegetation indices at various time scales and environmental conditions

Popis výsledku v původním jazyce

This study presents data points acquired during 2 years of measuring optical properties and gas-exchangencharacteristics of European beech (Fagus sylvatica) and Norway spruce (Picea abies) tree species in controllednenvironments. The observed statistical relationships between 105 pairs of selected optical parametersn(i.e. photochemical reflectance index [PRI], ΔPRI, and normalized difference between wavebands R690nand R630 [where R is a reflectance at a subscripted wavelength]) and light use efficiency (LUE) were considerednat assumed different canopy leaf area index, changing pigments stoichiometrics, and daily changingndynamics of environmental conditions. Our measurements suggested that consistency of the LUE estimationnusing PRI may be disrupted by acclimation responses of plants that reduce energetic carriers fornuse in photosynthetic CO2 uptake and the xanthophyll cycle. Also, a changing chlorophylls-to-carotenoidsnratio tends to interrupt the PRI–LUE relationship. ΔPRI showed sensitivity to leaf area index of the measuredntrees that complicated leaf-level estimation of LUE. The most consistent assessment of LUE wasnachieved using the chlorophyll fluorescence detecting ratio (R690 – R630)/(R690 + R630).

Název v anglickém jazyce

Predicting light use efficiency using optical vegetation indices at various time scales and environmental conditions

Popis výsledku anglicky

This study presents data points acquired during 2 years of measuring optical properties and gas-exchangencharacteristics of European beech (Fagus sylvatica) and Norway spruce (Picea abies) tree species in controllednenvironments. The observed statistical relationships between 105 pairs of selected optical parametersn(i.e. photochemical reflectance index [PRI], ΔPRI, and normalized difference between wavebands R690nand R630 [where R is a reflectance at a subscripted wavelength]) and light use efficiency (LUE) were considerednat assumed different canopy leaf area index, changing pigments stoichiometrics, and daily changingndynamics of environmental conditions. Our measurements suggested that consistency of the LUE estimationnusing PRI may be disrupted by acclimation responses of plants that reduce energetic carriers fornuse in photosynthetic CO2 uptake and the xanthophyll cycle. Also, a changing chlorophylls-to-carotenoidsnratio tends to interrupt the PRI–LUE relationship. ΔPRI showed sensitivity to leaf area index of the measuredntrees that complicated leaf-level estimation of LUE. The most consistent assessment of LUE wasnachieved using the chlorophyll fluorescence detecting ratio (R690 – R630)/(R690 + R630).

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Quo vaditis agriculture, forestry and society under global change? Conference proceeding

ISBN

978-80-87902-22-6

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

62-65

Název nakladatele

Global change research institute

Místo vydání

Brno

Místo konání akce

Velké Karlovice

Datum konání akce

2. 10. 2017

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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