3. Results
3.1. Species richness and surface abundance of
phytoplankton
In the mainstream of TGR in August 2004 (rainy
season), 46 genera (63 taxa) were recorded, belonging to 25 families. In April 2005 (dry season), the number
was 41 genera (60), belonging to 28 families (Table 2).
Taxa composed diatom, chlorophyta, cyanophyta,
cryptophyta, euglenophyta and pyrrophyta; chrysophyta
were not recorded. Diatoms were common in
TGR. In the rainy and dry seasons, diatoms accounted
for 46% and 53% of the total taxa, respectively.
Numbers of cyanophyta taxa were increased greatly in
the rainy season (six species) compare with the dry
season (two species).