NDLI: Diferencias espaciales en la evolución del NDVI en la cuenca alta del Aragón: efectos de los caminos en el uso del suelo

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Diferencias espaciales en la evolución del NDVI en la cuenca alta del Aragón: efectos de los caminos en el uso del suelo

Content Provider	Semantic Scholar
Author	Martínez, Teodoro Lasanta Serrano, Sergio Romo, Alfredo
Copyright Year	2003
Abstract	(*) fm@ipe.csic.es . RESUMEN: Se estudia la evolucion del Indice de Vegetacion Normalizado (NDVI) en el periodo 1993 –2000 en la cuenca Alta del Aragon (Pirineo occidental de Aragon) mediante imagenes de satelite NOAAAVHRR. Se comprueba que una parte importante del territorio muestra una tendencia positiva en los valores de NDVI, si bien se establecen algunos contrastes espaciales. Los valores mas altos corresponden a los antiguos campos agricolas, abandonados a lo largo del siglo XX, seguidos por las areas de matorral y los pinares (cubiertas derivadas de un proceso de sucesion vegetal tras la extensificacion productiva), mientras que el espacio cultivado y los pastos supraforestales (usos que mantienen una utilizacion mas intensiva) poseen los valores mas bajos. Estos resultados ponen de relieve el destacado papel de los cambios de uso del suelo en la evolucion de la biomasa vegetal. ABSTRACT: The vegetation cover evolution in the central Spanish Pyrenees is analysed from 1993 to 2000. The analysis has been achieved using one NDVI (Normalized Vegetation Index) temporal series obtained from NOAA-AVHRR images. A positive trend in NDVI data has been detected. However, the spatial differences in the magnitude and sign of NDVI trends are significant. An important increment of vegetation biomass is detected in most areas, particularly in those affected by field abandonment and extensive land use (shrublands and pine forests). Cultivated fields and pastures above timberline show a smaller increase in vegetation cover. The results indicate the important role of socio-economic transformations and land-use extensification in the vegetal biomass evolution.
Starting Page	51
Ending Page	66
Page Count	16
File Format	PDF HTM / HTML
DOI	10.18172/cig.1058
Alternate Webpage(s)	http://digital.csic.es/bitstream/10261/59589/1/Lasanta2003_DiferenciasEspacialesEnLaEvolucionDelNDVI.pdf
Alternate Webpage(s)	https://doi.org/10.18172/cig.1058
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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