Development of a fluorescent rapid method for assessing the primary production of phytoplankton as an initial link in carbon flux at the “Gelendzhik” carbon supersite

The parameters of primary productivity were studied in different seasons at the carbon polygon: the rate of primary production, the concentration of chlorophyll a, the assimilation number (AN), the rate of electron transport in photosystem II of phytoplankton (rETR), and the photosynthetic efficiency (AN/rETR). The direct correlation between the values of AN and rETR allows using the coefficient of photosynthetic efficiency to calculate primary production in mass units of carbon to assess the carbon flux from the atmosphere. This coefficient has seasonal specificity.