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Relation of Chlorophyll Fluorescence Sensitive Reflectance Ratios to Carbon Flux Measurements of Montanne Grassland and Norway Spruce Forest Ecosystems in the Temperate Zone
Joint Authors
Zitová, Martina
Vráblová, Martina
Navrátil, Martin
Marek, Michal
Malenovský, Zbyněk
Olejníčková, Julie
Ač, Alexander
Hanuš, Jan
Urban, Otmar
Špunda, Vladimír
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-06-04
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Natural & Life Sciences (Multidisciplinary)
Medicine
Information Technology and Computer Science
Abstract EN
We explored ability of reflectance vegetation indexes (VIs) related to chlorophyll fluorescence emission (R686/R630, R740/R800) and de-epoxidation state of xanthophyll cycle pigments (PRI, calculated as (R531−R570)/(R531−R570)) 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 (AMAX) 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.
ΔPRI and Δ(R686/R630) of grassland plant leaves under dark-to-full sunlight transition in the scale of minutes were significantly related to AMAX (R2=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 R686/R630 with NEE and GPP.
American Psychological Association (APA)
Ač, Alexander& Malenovský, Zbyněk& Urban, Otmar& Hanuš, Jan& Zitová, Martina& Navrátil, Martin…[et al.]. 2012. Relation of Chlorophyll Fluorescence Sensitive Reflectance Ratios to Carbon Flux Measurements of Montanne Grassland and Norway Spruce Forest Ecosystems in the Temperate Zone. The Scientific World Journal،Vol. 2012, no. 2012, pp.1-13.
https://search.emarefa.net/detail/BIM-492043
Modern Language Association (MLA)
Ač, Alexander…[et al.]. Relation of Chlorophyll Fluorescence Sensitive Reflectance Ratios to Carbon Flux Measurements of Montanne Grassland and Norway Spruce Forest Ecosystems in the Temperate Zone. The Scientific World Journal No. 2012 (2012), pp.1-13.
https://search.emarefa.net/detail/BIM-492043
American Medical Association (AMA)
Ač, Alexander& Malenovský, Zbyněk& Urban, Otmar& Hanuš, Jan& Zitová, Martina& Navrátil, Martin…[et al.]. Relation of Chlorophyll Fluorescence Sensitive Reflectance Ratios to Carbon Flux Measurements of Montanne Grassland and Norway Spruce Forest Ecosystems in the Temperate Zone. The Scientific World Journal. 2012. Vol. 2012, no. 2012, pp.1-13.
https://search.emarefa.net/detail/BIM-492043
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-492043