http://thesaurus.bhlscielo.org/vocab/pthttp://thesaurus.bhlscielo.org/vocab/pt?tema=315Ecossistema semi-árido http://thesaurus.bhlscielo.org/vocab/pt?tema=315 Geosfera BT http://thesaurus.bhlscielo.org/vocab/pt?tema=315 Savana NT http://thesaurus.bhlscielo.org/vocab/pt?tema=315 Região Semi-árida NT http://thesaurus.bhlscielo.org/vocab/pt?tema=315 Cerrado NT http://thesaurus.bhlscielo.org/vocab/pt?tema=315 Caatinga NT http://thesaurus.bhlscielo.org/vocab/pt?tema=315 Área seca e sub-úmida NT http://thesaurus.bhlscielo.org/vocab/pt?tema=315 Ecossistema terrestre BT