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dc.contributor.authorVicente Serrano, Sergio M.-
dc.contributor.authorLasanta Martínez, Teodoro-
dc.contributor.authorRomo, Alfredo-
dc.identifier.citationEnvironmental Management 34(6): 802-818 (2004)es_ES
dc.description17 páginas, 12 figuras, 4 tablas.-- El documento se encuentra en su versión post-print.es_ES
dc.description.abstractA vegetation cover increase has been identified at global scales using satellite images and vegetation indices. This fact is usually explained by global climatic change processes such as CO2 and temperature increases. Nevertheless, although these causes can be important, the role of socioeconomic transformations must be considered in some places, since in several areas of Northern Hemisphere an important change in management practices has been detected. Rural depopulation and land abandonment have reactivated the natural vegetation regeneration processes. This work analyses the vegetation evolution in the central Spanish Pyrenees from 1982 to 2000. The analysis has been done by using calibrated-NDVI temporal series from NOAA-AVHRR images. A positive and significant trend in NDVI data has been identified from 1982 to 2000 coinciding with a temperature increase in the study area. However, the spatial differences in magnitude and the sign of NDVI trends are significant. The role of land management changes in the 20th century is considered as a hypothesis to explain the spatial differences in NDVI trends. The role of land-cover and human land-uses on this process has been analyzed. The highest increment of NDVI is detected in lands affected by abandonment and human extensification. The importance of management changes in vegetation growth is discussed, and we indicate that although climate has great importance in vegetal evolution, land-management changes can not be neglected in our study area.es_ES
dc.description.sponsorshipThe authors wish to acknowledge financial support from the following projects: La recuperación del espacio agrícola como estrategia de gestión integrada del territorio en área de montaña: El ejemplo de los Altos Valles del Aragón y del Gállego (P049/2000), financed by the DGA; Caracterización espacio-temporal de las sequías en el valle medio del Ebro e identificación de sus impactos (BSO2002-02743); La identificación de fuentes de sedimento y áreas generadoras de escorrentía en relación con los cambios de uso del suelo (REN/2000-1709- C04/01/GLO), and Efectos erosivos del fuego a lo largo de un gradiente climático. Aportaciones para la gestión de áreas quemadas (REN/2002-00133), financed by the CICYT.es_ES
dc.subjectVegetation evolutiones_ES
dc.subjectRevegetation processeses_ES
dc.subjectVegetation trendses_ES
dc.titleAnalysis of Spatial and Temporal Evolution of Vegetation Cover in the Spanish Central Pyrenees: Role of Human Managementes_ES
dc.description.peerreviewedPeer reviewedes_ES
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