(Table 7) Isotopic composition of organic carbon and percentage of newly formed organic carbon in total organic carbon content in surface layer bottom sediments of the White Sea in August 2006

Calculations were made using the isotope mass balance: 100A=Bx+(100-x)C, where A is d13C-Corg of sediments; i' is d13C-Corg in microorganism biomass (-20 per mil); i¡ is d13C-Corg in suspended matter (-29 per mil); x is percentage of newly formed Corg in total i¡org in the layer 0-0.5 cm.