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Updated: Feb 5, 2026
10:20
Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses
Published on: August 9, 2019
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Assessing hyperspectral indices for tracing chlorophyll fluorescence parameters in deciduous forests
1Faculty of Agriculture, Shizuoka University, Shizuoka 422-8529, Japan.
Journal of Environmental Management
|September 5, 2018
Summary
Hyperspectral indices show limited success in tracking chlorophyll fluorescence parameters across diverse species. No single index is currently recommended for large-scale ecosystem monitoring of these vital plant processes.
Area of Science:
- Plant physiology
- Remote sensing
- Ecosystem monitoring
Background:
- Chlorophyll fluorescence quantifies photochemistry and heat dissipation efficiency.
- Pulse-Amplitude-Modulation (PAM) fluorometers enable direct measurements, but large-scale monitoring is challenging.
- Hyperspectral indices are explored as a potential solution for ecosystem-level fluorescence parameter estimation.
Purpose of the Study:
- To evaluate 30 published hyperspectral indices for their ability to trace chlorophyll fluorescence parameters.
- To assess the reliability of these indices across different broadleaf species and seasonal conditions.
- To determine if any indices can facilitate efficient large-scale monitoring of fluorescence parameters.
Main Methods:
- Collected synchronous measurements of reflected hyperspectra and seven fluorescence parameters (Fm, F0, Fs, Fm', Yield, qP, NPQ).
- Utilized unique datasets from Fagus crenata and six other deciduous species in Mt. Naeba, Japan.
- Included controlled experiments with inhibitors to refine physiological interpretations of indices.
Main Results:
- The Photochemical Reflectance Index (PRI) showed the highest determination coefficients and lowest RMSE for beech leaves.
- PRI's performance significantly decreased when applied to other broadleaf species.
- No evaluated hyperspectral index consistently and reliably traced chlorophyll fluorescence parameters across all tested species.
Conclusions:
- Current hyperspectral indices are not universally applicable for tracing chlorophyll fluorescence parameters.
- Species-specific responses limit the broad-scale application of indices like PRI.
- Further research is needed to develop robust hyperspectral methods for ecosystem-level fluorescence monitoring.
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