01375naa a2200265 a 450000100080000000500110000800800410001902000180006010000170007824500820009526000090017752005180018665300200070465300230072465300190074765300180076665300220078470000200080670000170082670000180084370000200086170000230088170000170090477301880092110875382012-11-13       2011    bl uuuu     u00u1 u    #d  a97898723175221 aPINTO, C. E.  aGrazing intensities on the vegetation diversity In the pampa biome grassland.  c2011  aBrazilian Pampa Biome represents native forage species with almost 400 grasses and 150 legumes (Boldrini, 1997). The natural grasslands are characterized by a spatial and temporal variety of forage plant species, and this heterogeneity is essential to explain and understand the actual interactions between plants and animals (Laca & Ortega, 1995). In this context the efforts of research converge in the understanding of dynamic relationships involving heterogeneous environments such as the pastoral rangelands.  aForae allowance  aLong term research  aPielou's Index  aShannon Index  aVegetal diversity1 aTRINDADE, J. K.1 aNEVES, F. P.1 aGARCIA, E. N.1 aGENRO, T. C. M.1 aCARVALHO, P. C. F.1 aNABINGER, C.  tIn: INTERNATIONAL RANGELAND CONGRESS, 9., 2011, Rosario, Argentina. Diverse rangelands for a sustainable society. Rosário: Instituto Nacional de Tecnología Agrpecuaria, 2011. p. 63.