In this period when the high values of TP were detected, it was also observed low richness of the Cladocera
community at Garças reservoir. Reference [28] showed that zooplankton species richness declined considerably
with increasing total phosphorus concentration on Danish lakes. The decline was particularly noticeable for the
number of cladoceran species. Reference [29] also found Cladocera assemblage changes with trophic state
mainly due to total phosphorus concentration.