Distribución espacial de anomalías del NDVI derivado del sensor VEGETATION SPOT 4/5 y su relación con las coberturas vegetales, usos de la tierra y características geomorfológicas en la provincia de Santiago del Estero, Argentina
; Zerda, Hugo Raul ; Grilli, Mariano Pablo
; Ravelo, Andres Carlos 
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05/2010
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Universidade Estadual do Centro-Oeste. Setor de Ciências Agrárias e Ambientais
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Ambiencia
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2175-9405
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Se determinaron las anomalías negativas (AN) y positivas (AP) del NDVI derivado del sensor VEGETATION SPOT 4/5, en la provincia de Santiago del Estero, Argentina. El periodo analizado (1998-2008) tuvo fuertes variaciones en los patrones de precipitación, por efecto del ENSO, por cuanto las anomalías del NDVI fueron evaluadas, mediante tabulación cruzada, en función de dos periodos: húmedo (PH) y seco (PS). Las AN, se relacionaron, durante todo el periodo, con vegetación halófila en áreas deprimidas salobres, con vegetación hidrófila en ambientes acuáticos y con suelo rocoso. Durante el PS, las AN se relacionaron con áreas deforestadas con fines agrícolas. Las AP, se relacionaron, durante todo el periodo, con el bosque Chaqueño denso y bosque Chaqueño Serrano denso. La mayor estabilidad y productividad de biomasa verde de los bosques, estaría relacionada, a su mayor biodiversidad, estratificación, al predominio de especies leñosas perennes de raíces profundas y a las estratégicas adaptaciones, morfológicas y fisiológicas, para el uso eficiente del agua. Las regiones geomorfológicas no se relacionan entre si entre periodos.
The negative (AN) and positive (AP) anomalies of the NDVI derived from sensor VEGETATION SPOT 4/5 were determined in the province of Santiago del Estero, Argentina. The analyzed period (1998-2008) presented strong variations in rainfall patterns, as a result of the ENSO, inasmuch as the anomalies of the NDVI were evaluated, by means of crossed tabulation, based on two periods: humid (PH) and dry (PS). The AN, were related with halophytic species of depressed areas, with vegetation aquatic hydrophilic and rocky ground. During the dry period, the AN were related to deforested areas with agricultural aims. The AP, were related, throughout the period with the forest dense Chaco Semiarid and forest dense Chaco Serrano. The greater stability and productivity of green biomass of forest, would be related, greater biodiversity, stratification, with a predominance of woody perennials with deep roots and strategic morphological and physiological adaptations, for the efficient use of water. The geomorphological regions are unrelated to each other between both periods.Key words: sensor VEGETATION SPOT 4/5; anomalies of NDVI; deforestation; vegetation native; drought; excess water and geomorfology
The negative (AN) and positive (AP) anomalies of the NDVI derived from sensor VEGETATION SPOT 4/5 were determined in the province of Santiago del Estero, Argentina. The analyzed period (1998-2008) presented strong variations in rainfall patterns, as a result of the ENSO, inasmuch as the anomalies of the NDVI were evaluated, by means of crossed tabulation, based on two periods: humid (PH) and dry (PS). The AN, were related with halophytic species of depressed areas, with vegetation aquatic hydrophilic and rocky ground. During the dry period, the AN were related to deforested areas with agricultural aims. The AP, were related, throughout the period with the forest dense Chaco Semiarid and forest dense Chaco Serrano. The greater stability and productivity of green biomass of forest, would be related, greater biodiversity, stratification, with a predominance of woody perennials with deep roots and strategic morphological and physiological adaptations, for the efficient use of water. The geomorphological regions are unrelated to each other between both periods.Key words: sensor VEGETATION SPOT 4/5; anomalies of NDVI; deforestation; vegetation native; drought; excess water and geomorfology
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