Range: 1.5 - 22 PgC
||Kallmeyer J, Pockalny R, Adhikari RR, Smith DC, D'Hondt S. Global distribution of microbial abundance and biomass in subseafloor sediment. Proc Natl Acad Sci U S A. 2012 Oct 2 109(40):16213-6. doi: 10.1073/pnas.1203849109. p.16216 left column bottom paragraphPubMed ID22927371
||P.16213 right column 2nd paragraph: "[Researchers] compiled [their] cell counts from the South Pacific Gyre (ref 5), the North Pacific Gyre, and the eastern equatorial Pacific Ocean with previously published counts from ocean margins and the equatorial Pacific Ocean (Fig. 1B)."
||P.16216 left column bottom paragraph: "Based on [researchers'] estimates of total subseafloor sedimentary cell
abundance and cellular carbon content, their calculation of subseafloor
microbial biomass amounts to 4.1petagram (Pg), with minimum and maximum estimates of 1.5–22PgC, respectively." Peta=10^15