Characterization of Chihuahuan desert vegetation phenology using high temporal resolution satellite imagery

Autor:	Albert J. Peters, Marien D. Eve
Rok vydání:	1998
Předmět:	geography geography.geographical_feature_category Phenology Geography Planning and Development Growing season Enhanced vegetation index Vegetation Normalized Difference Vegetation Index Shrubland Satellite imagery Physical geography Overgrazing Water Science and Technology Remote sensing
Zdroj:	Geocarto International. 13:47-54
ISSN:	1752-0762 1010-6049
Popis:	In the mid‐1800s, desert grasslands dominated much of the northern Chihuahuan Desert of the southwestern USA. Since that time, extensive degradation of those grasslands has occurred largely as a result of periodic drought and overgrazing. The present landscape in this region is characterized by scattered patches of the once extensive grasslands, separated by large areas of desert shrubland. Our research provides an evaluation the utility of high‐temporal resolution satellite imagery to characterize degradation processes in Chihuahuan desert vegetation. We calculated the normalized difference vegetation index at intervals throughout the growing season and combined the images into a single‐multitemporal file. Classification of the image was based on temporal dynamics of vegetation. Results were graphed for areas classified as grass and shrubland, and compared with ground data on cover, composition measures, and estimated level of degradation. Phenology of vegetation based upon satellite‐derived NDV...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::702984ebc6338bb20e6e7d27e28b8864 https://doi.org/10.1080/10106049809354664 Zobrazit plný text záznamu