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Analysis of substrate and plant spectral features of semi-arid shrub communities in the Owens Valley, CaliforniaAirborne Imaging Spectrometer (AIS) data were analyzed to deduce plant density and species composition in three semi-arid shrub-dominated communities of Owens Valley, CA, occurring on either a sand, granite alluvium, or basalt substrate. The high-spectral resolution AIS data were related to spectra obtained with field portable spectrometers, which in turn were related to plant and soil characteristics of the communities. Many of the dominant species have unique spectral features which permit their identification in AIS pixel images. The canopy-induced shadow may be a major factor influencing substrate spectral properties during fall and winter, because of low sun angles. Moreover, changes in spectral signatures following dormancy and leaf senescence tend to decrease contrasts between the plant community and the geologic substrate, also suggesting that fall and winter are a difficult time of year for spectral analyses.
Document ID
19860063084
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ustin, S. L.
(California, University Berkeley, United States)
Rock, B. N.
(California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Woodward, R. A.
(California, University Davis, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1986
Subject Category
Earth Resources And Remote Sensing
Accession Number
86A47822
Distribution Limits
Public
Copyright
Other

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