Detection of stress in coniferous forest trees with the VIRAF spectrometer

The Visible Infrared Reflectance Absorbance Fluorescence (VIRAF) spectrometer was applied in outdoor measurements to compare the needles of two spruce trees differently affected by the forest decline in the Northern Black Forest in Germany. Changes of the reflectance signatures due to loss of chloro...

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Bibliographic Details
Published inIEEE transactions on geoscience and remote sensing Vol. 29; no. 1; pp. 96 - 100
Main Authors Buschmann, C., Rinderle, U., Lichtenthaler, H.K.
Format Journal Article
LanguageEnglish
Published New York, NY IEEE 01.01.1991
Institute of Electrical and Electronics Engineers
Subjects
Absorption
Agronomy. Soil science and plant productions
Amplitude modulation
Biological and medical sciences
Fluorescence
Fundamental and applied biological sciences. Psychology
Infrared spectra
Methods and techniques. Experimental designs. Plant protection equipments
Needles
Phytopathology. Animal pests. Plant and forest protection
Position measurement
Pulse modulation
Reflectivity
Spectroscopy
Stress
Europe
Germany
West Germany
Forests
Fluorescence
Instrumentation
Forest decline
Remote sensing
Fluorescence spectrometry
Spectral signature
Coniferous forests
Reflection spectrum
Softwood forest tree
Gymnospermae
Chlorophyll
Method
Spectrometer
Ground truth
Biological activity
Absorption spectrum
Stress
Infrared spectrometry
Absorption spectrometry
Visible infrared spectrometry
Photosynthetic pigment
Coniferales
Spermatophyta
Detection
Aerial survey
Picea abies
Reflectance
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Summary:The Visible Infrared Reflectance Absorbance Fluorescence (VIRAF) spectrometer was applied in outdoor measurements to compare the needles of two spruce trees differently affected by the forest decline in the Northern Black Forest in Germany. Changes of the reflectance signatures due to loss of chlorophyll or other damage effects are interpreted with the help of other techniques currently used for the evaluation of physiological activity. The VIRAF spectrometer was used to examine the spectra of reflectance, absorption, and chlorophyll fluorescence. The measurements were carried out with the same sample without changing its position. By means of the two-wavelength chlorophyll fluorometer and pulse amplitude modulation fluorometer the fluorescence induction kinetics and several fluorescence parameters were determined as an indicator of vitality. In addition, the rate of photosynthetic CO/sub 2/ fixation and the stomatal closure were studied using a CO/sub 2/H/sub 2/O porometer.< >
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0196-2892
1558-0644
DOI:10.1109/36.103297