IFEVA   02662
INSTITUTO DE INVESTIGACIONES FISIOLOGICAS Y ECOLOGICAS VINCULADAS A LA AGRICULTURA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Effect of the interannual rainfall variability on aboveground net primary productivity of the patagonian grass steppe
Autor/es:
MASSARA PALETTO, VIRGINIA; SEMMARTIN, MARÍA; BUONO, GUSTAVO; LAURA YAHDJIAN
Lugar:
Rosario
Reunión:
Congreso; IX International Rangelands Congress; 2011
Institución organizadora:
Rangeland Society
Resumen:
Effect of the interannual rainfall variability on aboveground net primary productivity of the patagonian grass steppe  Introduction: Aboveground Net Primary Production (ANPP) largely depends on precipitation and constrains both secondary production and range management decisions. One of the best documented relationship in grassland ecology is the linnear and positive response of primary productivity to precipitation. Moreover, models that describe the changes in productivity over time for a given site (temporal model) show that the increase of ANPP per millimeter of precipitation is smaller than models that relate different sites on a spatial precipitation gradient (spatial model). In addition, recent studies indicate that the response of ANPP to precipitation would be asymmetric since the reduction in ANPP observed during dry years is lower than the increases observed during wet years. The objective of this study was to evaluate the effects of interannual water availability on ANPP of the main species of a semi-arid grassland in the Patagonian steppe, in southern of Argentina.