Testate amoebae as bio-indicators of contamination by trace elements in the reservoir of Salto Grande Americana SP, Brazil - Misailidis Lerena, Maria Laura; Stríkis, Nicolás Misailidis; Figueira, Rubens César Lopes; Cordeiro, Renato Campello; Strikis, Pedro Carlos; Pregnolato, Leonardo Antônio; Duleba, Wânia (Journal of Sedimentary Environments, 2017)