FIGURE 2. Total species richness (red line; scale on right-had side of graph) and relative proportion (%) of native and exotic species in different land use systems in Rio Grande do Sul state, Brazil. Abbreviations and number of sites per land use are as follows: NP = native pasture (n=22), NF = native forest (n=21), RF = riparian forest (n=7), SB = stream/river bank, flooded area, fallow lowland area (n=24), EP = Eucalyptus plantation (n=7), BW = Black wattle (Acacia sp.) plantation (n=1), PP = Pinus plantation (n=8), AP=Araucaria plantation (n=2), CP = cultivated pasture (n=26), PC=perennial crops (n=14), AC = annual crops (n=35), U=urban area (n=20), VG=vegetable gardens (n=14), B=bamboo (n=3), W=organic wastes (n=12), OW=other wastes (rotten log, under fern) (n=2), L = lawn (n=4), AG=Agropastoral system (n=7).