(Table 8) Isotopic composition of organic carbon in suspended matter and percentage of newly formed organic carbon in total organic carbon content in the fluffy layer of the Dvina Bay, White Sea in July 2010

Calculations were made according to the isotope mass balance equation: 100A=Bx+(100-x)C, where A is d13C-Corg of sediment; i' is d13C-Corg of microorganism biomass (-20.0 per mil); i¡ is d13C-Corg in suspended matter of the surface water layer ; x is percentage of newly formed Corg in total Corg content in the fluffy layer.

本研究依据同位素质量平衡方程（isotope mass balance equation）开展计算：100A = Bx + (100 - x)C，其中A为沉积物有机碳的碳同位素δ¹³C（d13C-Corg）；B为微生物生物量有机碳的碳同位素δ¹³C（-20.0‰）；C为表层水体悬浮颗粒物中的有机碳碳同位素δ¹³C（d13C-Corg）；x为絮状层内新增有机碳占总有机碳含量的百分比。