Based on the phytoplankton analysis, the observed spatial and temporal distribution trends as well as relative abundances of phytoplankton groups are within usual values and in accordance with environmental conditions. High biodiversity, low incidence of bloom events and relatively low phytoplankton biomass (as reported for Descriptor 5) indicate that anthropogenic pressure does not adversely affect phytoplankton abundance or biodiversity, thus ensuring the long-term sustainability of phytoplankton community.