1. Graduate Program in Botany, Institute of Biological Sciences, University of Brasília , Brasília DF, 70910-900 , Brazil
2. Department of Botany, Institute of Biological Sciences, University of Brasília , Brasília DF, 70910-900 , Brazil
3. Graduate Program in Ecology, Institute of Biological Sciences, University of Brasília , Brasília DF, 70910-900 , Brazil
4. Ecology Laboratory, University of Mato Grosso State , Alta Floresta, MT , Brazil