Seasonal variations of metal concentration were observed
(Po0.05) for Mn (station 1), Zn (stations 1 and 2) and Cu (all
stations). Station 3 showed the highest concentration of Fe in the
wet season (45,750 mg/kg) while station 1 presented the highest concentration of Mn in the dry season (297 mg/kg). The highest Cu
concentration was observed at station 3 in the wet season
(264 mg/kg).