5 CONCLUSION
This study provides a comprehensive
description of the phytoplankton
community in the NT2 Reservoir. A total
of 180 taxa were recorded over the
period of study. Among them, Dinoflagellates
dominated the phytoplankton community since the impoundment. Its
colonisation capacity in a new environment
and its mixotrophic characteristics
make them well adapted to the NT2
Reservoir environment. Two years after
impoundment, the NT2 phytoplankton
biomass showed significant seasonal
changes. These changes were driven
by environmental variables (water temperature,
precipitation) and hydrological
factors (water level fluctuation).
Then, the response of the phytoplankton
community to environmental changes
suggests the utility of the phytoplankton
as a monitoring tool of the water quality
assessment of young sub-tropical reservoirs.