Abstract

MASSA, Ernesto S; OAKLEY, Luis J; PRADO, Darién E  and  FELDMAN, Susana R. Resiliencia de un pajonal de Panicum prionitis Nees bajo distintas alternativas de manejo. Ecol. austral [online]. 2016, vol.26, n.3, pp.236-245. ISSN 1667-782X.

Panicum prionitis ("paja de techar") tall grasslands are one of the most extensive vegetation types in the islands of the Parana River valley. These communities are traditionally burned in order to improve its quality forage and animal consumption. Our objective was to analyze the effect of different disturbances along two years: prescribed fire, mowing and control using multivariate analyses on vegetation variables (abundance-cover, richness, evenness and diversity). P. prionitis remained as dominant species regardless of treatment and throughout the experiment. Even though disturbances affected species composition, no significant effect was detected on richness, evenness, and diversity. Mowing and the use of prescribed fire showed the same effect on this highly resilient community.

Keywords : Disturbance; Fire; Rangelands; Regeneration.

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