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Map of grass invasions from 2004 to 2012 in plots subjected to annual (B1yr) or triennial burns (B3yr) and in the unburned control: Aristida longifolia, Andropogon gayanus, Pennisetum sp., B. decumbens, Imperata sp., grass-mix (area with more than one grass species) and other species (species listed in the electronic supplementary material, S1) (areas in black were not invaded by grasses). (Online version in colour.)
