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Statements

Subject Item
n2:RIV%2F60076658%3A12310%2F12%3A43883646%21RIV13-MSM-12310___
rdf:type
skos:Concept n7:Vysledek
dcterms:description
We explored ability of reflectance vegetation indexes (VIs) related to chlorophyll fluorescence emission (R-686/R-630, R-740/R-800) and de-epoxidation state of xanthophyll cycle pigments (PRI, calculated as (R-531 - R-570)/(R-531 - R-570)) to track changes in the CO2 assimilation rate and Light Use Efficiency (LUE) in montane grassland and Norway spruce forest ecosystems, both at leaf and also canopy level. VIs were measured at two research plots using a ground-based high spatial/spectral resolution imaging spectroscopy technique. No significant relationship between VIs and leaf light-saturated CO2 assimilation (A(MAX)) was detected in instantaneous measurements of grassland under steady-state irradiance conditions. Once the temporal dimension and daily irradiance variation were included into the experimental setup, statistically significant changes in VIs related to tested physiological parameters were revealed. Delta PRI and Delta(R-686/R-630) of grassland plant leaves under dark-to-full sunlight transition in the scale of minutes were significantly related to A(MAX) (R-2 = 0.51). In the daily course, the variation of VIs measured in one-hour intervals correlated well with the variation of Gross Primary Production (GPP), Net Ecosystem Exchange (NEE), and LUE estimated via the eddy-covariance flux tower. Statistical results were weaker in the case of the grassland ecosystem, with the strongest statistical relation of the index R-686/R-630 with NEE and GPP. We explored ability of reflectance vegetation indexes (VIs) related to chlorophyll fluorescence emission (R-686/R-630, R-740/R-800) and de-epoxidation state of xanthophyll cycle pigments (PRI, calculated as (R-531 - R-570)/(R-531 - R-570)) to track changes in the CO2 assimilation rate and Light Use Efficiency (LUE) in montane grassland and Norway spruce forest ecosystems, both at leaf and also canopy level. VIs were measured at two research plots using a ground-based high spatial/spectral resolution imaging spectroscopy technique. No significant relationship between VIs and leaf light-saturated CO2 assimilation (A(MAX)) was detected in instantaneous measurements of grassland under steady-state irradiance conditions. Once the temporal dimension and daily irradiance variation were included into the experimental setup, statistically significant changes in VIs related to tested physiological parameters were revealed. Delta PRI and Delta(R-686/R-630) of grassland plant leaves under dark-to-full sunlight transition in the scale of minutes were significantly related to A(MAX) (R-2 = 0.51). In the daily course, the variation of VIs measured in one-hour intervals correlated well with the variation of Gross Primary Production (GPP), Net Ecosystem Exchange (NEE), and LUE estimated via the eddy-covariance flux tower. Statistical results were weaker in the case of the grassland ecosystem, with the strongest statistical relation of the index R-686/R-630 with NEE and GPP.
dcterms:title
Relation of Chlorophyll Fluorescence Sensitive Reflectance Ratios to Carbon Flux Measurements of Montanne Grassland and Norway Spruce Forest Ecosystems in the Temperate Zone Relation of Chlorophyll Fluorescence Sensitive Reflectance Ratios to Carbon Flux Measurements of Montanne Grassland and Norway Spruce Forest Ecosystems in the Temperate Zone
skos:prefLabel
Relation of Chlorophyll Fluorescence Sensitive Reflectance Ratios to Carbon Flux Measurements of Montanne Grassland and Norway Spruce Forest Ecosystems in the Temperate Zone Relation of Chlorophyll Fluorescence Sensitive Reflectance Ratios to Carbon Flux Measurements of Montanne Grassland and Norway Spruce Forest Ecosystems in the Temperate Zone
skos:notation
RIV/60076658:12310/12:43883646!RIV13-MSM-12310___
n7:predkladatel
n8:orjk%3A12310
n3:aktivita
n5:P n5:V n5:Z
n3:aktivity
P(ED1.1.00/02.0073), P(GA522/09/0468), P(LM2010007), P(SP/2D1/70/08), P(SP/2D1/93/07), V, Z(AV0Z60870520)
n3:cisloPeriodika
705872
n3:dodaniDat
n20:2013
n3:domaciTvurceVysledku
n15:9312366
n3:druhVysledku
n9:J
n3:duvernostUdaju
n13:S
n3:entitaPredkladatele
n6:predkladatel
n3:idSjednocenehoVysledku
164802
n3:idVysledku
RIV/60076658:12310/12:43883646
n3:jazykVysledku
n18:eng
n3:klicovaSlova
PHOTOSYNTHETIC ACTIVITY; REMOTE ESTIMATION; SPECTRAL REFLECTANCE; STEADY-STATE; BOREAL FOREST; WATER-STRESS; XANTHOPHYLL-CYCLE; VEGETATION APPARENT REFLECTANCE; RADIATION-USE EFFICIENCY; LIGHT-USE EFFICIENCY
n3:klicoveSlovo
n12:BOREAL%20FOREST n12:VEGETATION%20APPARENT%20REFLECTANCE n12:STEADY-STATE n12:LIGHT-USE%20EFFICIENCY n12:SPECTRAL%20REFLECTANCE n12:XANTHOPHYLL-CYCLE n12:RADIATION-USE%20EFFICIENCY n12:REMOTE%20ESTIMATION n12:PHOTOSYNTHETIC%20ACTIVITY n12:WATER-STRESS
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[30725A1B8265]
n3:nazevZdroje
SCIENTIFIC WORLD JOURNAL
n3:obor
n21:EH
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
10
n3:projekt
n17:GA522%2F09%2F0468 n17:SP%2F2D1%2F70%2F08 n17:SP%2F2D1%2F93%2F07 n17:LM2010007 n17:ED1.1.00%2F02.0073
n3:rokUplatneniVysledku
n20:2012
n3:svazekPeriodika
%22Neuveden%22
n3:tvurceVysledku
Vráblová, Martina Zitova, Martina Ac, Alexander Malenovsky, Zbynek Olejnickova, Julie Spunda, Vladimir Urban, Otmar Hanus, Jan Navratil, Martin Marek, Michal
n3:wos
000307458300001
n3:zamer
n11:AV0Z60870520
s:issn
1537-744X
s:numberOfPages
13
n19:doi
10.1100/2012/705872
n14:organizacniJednotka
12310