1. Lab. of Land Use and Natural ResourcesUniv. of Passo FundoCampus I, BR 285, km 29299052‐900Passo FundoRio Grande do SulBrazil
2. Federal Institute of Education, Science and Technology of Rio Grande do SulOsvaldo Aranha, 540995700‐000Bento GonçalvesRio Grande do SulBrazil
3. Federal Univ. of Santa MariaAv. Roraima 100097105‐900Santa MariaRio Grande do SulBrazil
4. Univ. de Poitiers IC2MP‐HydrASA UMR 72857 rue Albert Turpain, B35 TSA 5110686073PoitiersFrance