at the sea floor 350μg C/cm^3: ~40m beneath sea floor <5 μg C/cm^3
||Braun S et al., Size and Carbon Content of Sub-seafloor Microbial Cells at Landsort Deep, Baltic Sea. Front Microbiol. 2016 Aug 31 7: 1375. doi: 10.3389/fmicb.2016.01375 p.7 left column top paragraph and p.8 figure 4PubMed ID27630628
||Andrén, T., Jørgensen, B. B., Cotterill, C., Green, S., and Exped. 347 Scientists (2015). “Baltic sea paleoenvironment,” in Proceedings of the Integrated Ocean Drilling Program, Vol. 347 (Tokyo: Integr. Ocean Drill. Program Manag. Int.). Available online at: link
||Abstract: "To determine their shape and volume, cells were separated from the sediment matrix by multi-layer density centrifugation and visualized via epifluorescence microscopy (FM) and scanning electron microscopy (SEM). Total cell-carbon was calculated from amino acid-carbon, which was analyzed by high-performance liquid chromatography (HPLC) after cells had been purified by fluorescence-activated cell sorting (FACS)." P.8 caption to figure 4: "The carbon content of
total microbial cells in the sediment (blue circle symbols) was obtained by multiplying the mean cell-specific carbon content with the number of DNA stainable microbial cells (primary source)."
||P.7 left column top paragraph: "Based on counted cell numbers (primary source, Supplementary Table 1), the mean carbon content of total microbial cells in the sediment decreased from 350 μg C/cm^3 sediment to < 5 μg C/cm^3 sediment (Figure 4)." μgC=10^-6grams Carbon