Members of the Euglenophyta
division were not so abundant during the study period, having an average cell density of only 397 cell x [mL.sup.-1]s, and a relative abundance of less than 8%.
Chlorophyta had [bar.X]=18 [+ or -] 2.08 species per site; Cyanophyta had [bar.X]=16 [+ or -] 1.00 species; Bacillariophyta had X=7 [+ or -] 1.15 species; Cryptophyta had [bar.X]=2 [+ or -] 0.58 species; Chrysophyta had [bar.X]=1 [+ or -] 0.00 species per site; and Euglenophyta
had [bar.X]=2 [+ or -] 0.00 species per site.
Abbreviations: TN: total nitrogen; TP: total phosphorus; WT: water temperature; Cond: conductivity; Chla: chlorophyll a; Wind: wind mean speed; DOC: dissolved organic carbon; bCyano: Cyanobacteria biovolume; bChloro: Chlorophyta biovolume; bOther: Bacillariophyta + Dinophyta + Euglenophyta
A total of 58 families, 121 genera, 273 species, one subspecies, 75 varieties, 13 forms and one morphotype were identified in the taxa Bacillariophyta (42.0%), Chlorophyta (29.0%), Cyanoprocaryota (18.0%), Euglenophyta
(5.0%), Dinophyta (3.0%), Cryptophyta (2.0 %) and Chrysophyta (1.0%).
and Dinophyta also had a similar contribution (8%).
Bladder content showed the following zooplankton groups: rotifers, cladocerans, copepods, annelids, rhizopodeans, and insects; and the following phytoplankton divisions: Bacillariophyta, Chlorophyta, Cyanophyta, and Euglenophyta
The phytoplanktonic density study in Mundau and Manguaba Lagoons revealed the occurrence of cyanophyta, euglenophyta
, dinoflagellate, diatoms, phytoflagellate and chlorophyta, observing a great variation in the cellular density of the phytoplankton when comparing the two lagoons (Mundau and Manguaba) and the two studied periods (dry and rainy), with higher values obtained in Manguaba Lagoon in the dry period (September and November).
The effluent of the phytoplancton was represented by the groups Bacillariophyta, Chlorophyta, Euglenophyta
, Cyanophyta, Cryptophyta and Dinophyta.
Cyanobacteria, Charophyta, Miozoa, Ochrophyta y Euglenophyta
presentaron menores valores.
Phytoplankton biomass was dominated by Cyanophyta, Chlorophyta, Bacillariophyta and Euglenophyta