0.05 - 0.5 µm^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.10 left column bottom paragraphPubMed ID27630628
||Romanova, N. D., and Sazhin, A. F. (2010). Relationships between the cell volume and the carbon content of bacteria. Mar. Biol. 50, 556–565. doi: 10.1134/s0001437010040089 AND Lever, M. A., Rogers, K. L., Lloyd, K. G., Overmann, J., Schink, B., Thauer, R. K., et al. (2015). Life under extreme energy limitation: a synthesis of laboratory- and field-based investigations. FEMS Microbial. Rev. 39, 688–728. doi: 10.1093/femsre/fuv020PubMed ID25994609
||Primary source Romanova and Sazhin abstract: "[Investigators] made an attempt to summarize all the present data on the relationships between the cell volume, its dry weight, and the carbon content. Thus, the principal goal of the present study was searching for a generally applicable or methodology-dependent converting factor for the bacterial biomass calculation."
||P.10 left column bottom paragraph: "Microorganisms commonly found in natural environments such as soils, freshwater lakes and rivers, estuarine and brackish waters, coastal and nearshore marine waters, or pelagic marine waters generally have cell volumes between 0.05 and 0.5 μm^3 (primary sources). These volumes are typically 2–10-fold lower than those of cells in growing pure cultures (e.g., Trueba and Woldringh, 1980, Montesinos et al., 1983, Troussellier et al., 1997)."