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

Result code in 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>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Predicting light use efficiency using optical vegetation indices at various time scales and environmental conditions
Original language description
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).
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
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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Number of pages
4
Pages from-to
62-65
Publisher name
Global change research institute
Place of publication
Brno
Event location
Velké Karlovice
Event date
Oct 2, 2017
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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