(Table 1) Primary production of organic carbon in the southeastern Baltic Sea in different seasons of 2003-2007

Values and seasonal variations of primary production and chlorophyll a concontration were investigated in the Russian sector of the southeastern Baltic Sea in 2003-2007. Annual average values of primary production and chlorophyll concentration for this area were 231 g C/m**2/year and 2.9 µg/l, respectively; i.e. they corresponded to the mesotrophic level according to the trophic classification. Spatial distribution of primary production and chlorophyll concentrations in different seasons and the annual average increased values exhibited at the northern coast of the Sambian Peninsula and in the Curonian Spit. In these areas values of primary production and chlorophyll concentrations corresponded to the eutrophic level.