Mapping spatio-temporal variation in Douglas-fir (Pseudotsuga menziesii) foliar biochemistry

A high resolution imaging spectroscopy study was conducted, which investigated the spatial and temporal diversity of biochemistry in Douglas-fir (Pseudotsuga menziesii) stands of southern Vancouver Island, Canada. An AVIRIS dataset with a nominal spatial resolution of 4 m was acquired coincident wit...

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Bibliographic Details
Main Authors: Goodenough, D.G., Niemann, K.O., Quinn, G.S., Liu, J.
Format: Conference Proceeding
Language:English
Subjects:
Biochemistry
Chemistry
chlorophyll
derivatives
Douglas-fir
High-resolution imaging
Hyperspectral imaging
Laboratories
Nitrogen
partial least-squares
Reflectivity
Spatial resolution
Spectroscopy
Stress
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Summary:A high resolution imaging spectroscopy study was conducted, which investigated the spatial and temporal diversity of biochemistry in Douglas-fir (Pseudotsuga menziesii) stands of southern Vancouver Island, Canada. An AVIRIS dataset with a nominal spatial resolution of 4 m was acquired coincident with sample acquisition that measured organic and inorganic chemistry. An AISA dataset was collected for the same study site. Partial least-squares regression was applied and chemistry was modeled from reflectance. Nitrogen, chlorophyll (a, b) were selected as contributing to reflectance responses. Chemistry estimation achieved R 2 values ges0.93 for both datasets. The models applied to the hyperspectral imagery yielded two temporally discrete datasets of biochemistry. Change detection analysis was conducted with attention to chlorophyll a/b for its ability to indentify regions of forest disturbance and stress. Factors affecting biochemistry were investigated with reference to laboratory data (management strategy and maturity).
ISSN:2158-6268
2158-6276
DOI:10.1109/WHISPERS.2009.5289030