Microbial processing of sediment-derived dissolved organic matter

In this study, we used Fourier transform ion cyclotron resonance mass spectrometry and excitation emission matrix fluorescence and parallel factor analysis to analyze molecular composition of solid phase extracted sediment-derived dissolved organic matter (SDOM). The transfomation of SDOM extracte by microbes was studied in its overlying seawater. Breifly, the SDOM extract was mixed into the seawater-filled carboys as SDOM treatments, while the no addition carboys were made as controls. During the 110-day incubation, bacterial abundance, viral abundance, total and dissolved organic carbon concentrations of the control and SDOM treatments were also measured.