Comparison of the metabolism of two floodplaín lakes of the Trombetas River (Pará, Brazil) based on a study of diel variation

Abstract

The diel variation of temperature, pH, electrical conductivity, dissolved oxygen concentration and chlorophyll-a was investigated in Batata and Mussurá Lakes on the Trombetas River floodplain. The diel variation of temperature was distinct in both lakes. The water column of Batata lake was completely mixed after 22% hour and Mussurií lake developed a well established gradient of temperature (differences up to 5.6 "C between surface and depth) which persisted a11 over the period studied