Assessment of biomass dynamics of a semidesert grassland by remote sensing techniques.

Persistent Link:
http://hdl.handle.net/10150/184999
Title:
Assessment of biomass dynamics of a semidesert grassland by remote sensing techniques.
Author:
Lumbuenamo, Sinsi Dianza.
Issue Date:
1990
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
In order to study the effect of standing dead biomass on vegetation canopy spectral response, the normalized difference, the soil-adjusted vegetation index, the green vegetation index and the perpendicular vegetation index were used to examine and compare the spectral behavior of a mostly green (regrowth after burning) vegetation canopy to a perennial vegetation stand. Results showed all greenness indicators to be strongly affected by the presence of standing dead vegetation. The burned plots which had less green biomass in the first growing season (February-June) exhibited higher vegetation index values through the entire growing season. The observed discrepancies in the vegetation indices seem to stem from the attenuation of the near-infrared flux combined with a lack of responsivity of the red channel. Overall, there was no correlation between green biomass and greenness measures in the perennial stand. Furthermore, in the perennial environment, a steady increase in "greenness" was observed while the green biomass was actually decreasing. The problem seems to be more of visibility than quantity of green biomass present.
Type:
text; Dissertation-Reproduction (electronic)
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Soil and Water Science; Graduate College
Degree Grantor:
University of Arizona
Advisor:
Huete, Alfredo R.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleAssessment of biomass dynamics of a semidesert grassland by remote sensing techniques.en_US
dc.creatorLumbuenamo, Sinsi Dianza.en_US
dc.contributor.authorLumbuenamo, Sinsi Dianza.en_US
dc.date.issued1990en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractIn order to study the effect of standing dead biomass on vegetation canopy spectral response, the normalized difference, the soil-adjusted vegetation index, the green vegetation index and the perpendicular vegetation index were used to examine and compare the spectral behavior of a mostly green (regrowth after burning) vegetation canopy to a perennial vegetation stand. Results showed all greenness indicators to be strongly affected by the presence of standing dead vegetation. The burned plots which had less green biomass in the first growing season (February-June) exhibited higher vegetation index values through the entire growing season. The observed discrepancies in the vegetation indices seem to stem from the attenuation of the near-infrared flux combined with a lack of responsivity of the red channel. Overall, there was no correlation between green biomass and greenness measures in the perennial stand. Furthermore, in the perennial environment, a steady increase in "greenness" was observed while the green biomass was actually decreasing. The problem seems to be more of visibility than quantity of green biomass present.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineSoil and Water Scienceen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorHuete, Alfredo R.en_US
dc.contributor.committeememberDutt, Gordon R.en_US
dc.contributor.committeememberMarsh, Stuart E.en_US
dc.contributor.committeememberJackson, Ray D.en_US
dc.contributor.committeememberPost, Donald F.en_US
dc.identifier.proquest9024510en_US
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