Diversity and Operational Taxonomic Units of bacterioplankton are highest in cold water seasons.
α-proteobacteria in cold seasons respond rapidly to pulses of the inorganic nutrients.
γ-proteobacteria in warm seasons are the most active type of bacterioplankton present.
Cyanobacteria are more abundant at low temperatures.
Cytophaga-Flavobacteria group is more abundant in nutrient-rich conditions.