Section p a ge 



Distribution of seston in the River Svisloch in August 



of 1973 152 



Relative chlorophyll content in seston of the River 



Svisloch in June of 1973 153 



Specific Oxygen Consumption (SOC) by seston in three 

 representative lakes 154 



Relationship of photosynthesis ($) and obstruction (D) 



in the Neman River in August of 1975 155 



The ration of O/D and O/R on the Pripyat River 156 



VII 



