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Permanent link (DOI): https://doi.org/10.7939/R3WS5R

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Monitoring year-to-year variability in dry mixed-grass prairie yield using multi-sensor remote sensing Open Access

Descriptions

Other title
Subject/Keyword
SPOT
biomass
dry mixed-grass prairie
remote sensing
rangeland
normalized difference vegetation index
MODIS
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Wehlage, Donald C.
Supervisor and department
Gamon, John (Earth and Atmospheric Sciences)
Examining committee member and department
Azofeifa-Sanchez, Arturo (Earth and Atmospheric Sciences)
Bork, Edward (Agricultural, Food and Nutritional Science)
Department
Department of Earth and Atmospheric Sciences
Specialization

Date accepted
2012-09-18T09:05:12Z
Graduation date
2012-09
Degree
Master of Science
Degree level
Master's
Abstract
The Normalized Difference Vegetation Index (NDVI) and harvested biomass were compared to assess rangeland productivity (above-ground green biomass or “yield”) in southern Albertan dry mixed-grass prairie. Seasonal trends during the 2009 and 2010 growing seasons were investigated using harvested biomass and NDVI derived from ground spectrometry and the Aqua and Terra Moderate Resolution Imaging Spectroradiometers (MODIS) and Système Pour l'Observation de la Terre (SPOT) satellite platforms. Drought in 2009 and high precipitation in 2010 provided contrasting “treatments” that were captured with measurements of NDVI. NDVI showed a saturating response to green plant biomass, with the strongest correlation (R2=0.97) arising from mid-summer measurements. NDVI from satellite remote sensing can accurately estimate interannual variation in standing green biomass, and field spectrometry can provide validation for satellite data. These methods can be used to identify the effects of yearly precipitation variability on above-ground biomass in the dry mixed-grass prairie.
Language
English
DOI
doi:10.7939/R3WS5R
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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