Characterizing non-pigment canopy biochemistry from imaging spectrometer data for studying ecosystem processes Gregory P. Asner, Gregory P. Asner, Mary E. Martin, Mary E. Martin, Scott V. Ollinger, & Scott V. Ollinger, & Carol A. Wessman Carol A. Wessman Raymond F. Kokaly Raymond F. Kokaly U.S. Geological Survey U.S. Geological Survey Ohio State Univ. Ohio State Univ.
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Characterizing non-pigment canopy biochemistry from imaging spectrometer data for studying ecosystem processes Gregory P. Asner, Gregory P. Asner, Mary.
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Characterizing non-pigment canopy biochemistry from imaging spectrometer
data for studying ecosystem processes
Gregory P. Asner,Gregory P. Asner,
Mary E. Martin,Mary E. Martin,
Scott V. Ollinger, &Scott V. Ollinger, &
Carol A. Carol A. WessmanWessman
Raymond F. KokalyRaymond F. Kokaly
U.S. Geological SurveyU.S. Geological Survey
Ohio State Univ.Ohio State Univ.
General Research Goals
• To quantify non-pigment biochemistry at the leaf and canopy levels using reflectance spectroscopy
• Apply knowledge of leaf spectroscopy for detailed characterization of vegetation
• Quantify canopy biochemistry to increase understanding of fine-scale variations in ecosystem processes over large areas
Mutanga et al., Remote Sensing of Environment 96 (2005) 108– 118
Biochemical Components of Plants
• Cellulose– Cellulose monomers (β-glucose) are linked
together through 1→4 glycosidic bonds– Cellulose is a common material in plant cell
walls– Cellulose is the most abundant form of living
terrestrial biomass (R.L. Crawford 1981).
Biochemical Components of Plants
• Lignin– 10% to 40% by dry weight– Lignin is a large macromolecule with molecular
mass in excess of 10,000 amu.– Structural component of plant cell walls.– It is hydrophobic and aromatic in nature.– Lignin concentration in litter has strong
influence on ecosystem processes
CelluloseCellulose
LigninLignin
PineCellulose:Lignin = 1.5
= 3.8
GrassCellulose:Lignin
Kokaly et al., Remote Sensing of Environment, in press
Apply knowledge of leaf spectroscopy for detailed
characterization of vegetation
Cerro Grande FireCerro Grande FireLos Alamos,Los Alamos,New MexicoNew Mexico
PineCellulose:lignin =1.5
=3.8
GrassCellulose:lignin
Kokaly et al., Remote Sensing of Environment, in press
AVIRIS Dry Grass
AVIRISDry Pine
Kokaly et al., Remote Sensing of Environment, in press
Results: AVIRIS Maps
GreenGreenVegetationVegetation
Mineral/AshMineral/Ash
Mineral-1Mineral-1mm
Mineral-2Mineral-2mm
Dry ConiferDry Conifer
Dry & GreenDry & GreenConiferConifer
Straw mattingStraw matting
Ash/CharcoalAsh/Charcoal
Straw mattingStraw matting & Green grass& Green grass
Kokaly et al., Remote Sensing of Environment, in press
GreenGreenVegetationVegetation
Mineral/AshMineral/Ash
Mineral-1Mineral-1mm
Mineral-2Mineral-2mm
Dry ConiferDry Conifer
Dry & GreenDry & GreenConiferConifer
Straw mattingStraw matting
Ash/CharcoalAsh/Charcoal
Straw mattingStraw matting & Green grass& Green grass
Kokaly et al., Remote Sensing of Environment, in press
High Burn SeverityHigh Burn Severity
Kokaly et al., Remote Sensing of Environment, in press
30m
Analysis of spectral shape (full spectrum and/or absorption features) for vegetation