Fluorescence line imager measured "red edge shifts" in a metal-stressed Norway spruce forest and their relationship to canopy biochemical and morphological changes

Cliff Banninger

doi:10.1117/12.21357

1 September 1990 Fluorescence line imager measured "red edge shifts" in a metal-stressed Norway spruce forest and their relationship to canopy biochemical and morphological changes

Cliff Banninger

Author Affiliations +

Proceedings Volume 1298, Imaging Spectroscopy of the Terrestrial Environment; (1990) https://doi.org/10.1117/12.21357
Event: 1990 Technical Symposium on Optics, Electro-Optics, and Sensors, 1990, Orlando, FL, United States

Abstract

Spatial and spectral mode FLI airborne imaging spectrometer data obtained from a metal-stressed Norway spruce forest exhibiting subtle stress symptoms correlate poorly with changes in canopy chlorophyll content and biomass with respect to changes or " shifts" in the wavelength positions of the red chlorophyll absorptance well and the transition region between the red reflectance minimum and near-infrared reflectance maximum (the so-called " red edge" ) with " shift" directions being highly variable and displaying no clear trends relative to canopy stress conditions. The lack of strong relationships between canopy parameters that provide a measure of its health and vitality and canopy spectral features that are purported to give a reliable measure of changes in these features does not bode well for the use of the " red edge shift" as a consistent and unambiguous indicator of stress in coniferous forests especially for low or incipient levels of stress. 1.

Citation Download Citation

Cliff Banninger "Fluorescence line imager measured "red edge shifts" in a metal-stressed Norway spruce forest and their relationship to canopy biochemical and morphological changes", Proc. SPIE 1298, Imaging Spectroscopy of the Terrestrial Environment, (1 September 1990); https://doi.org/10.1117/12.21357

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