Rates of Subsurface Geobacter Species Growth In Situ Molecular Analysis of the

are often inaccurate. Not only can unknown propor-tionsofcellsbeattachedtosubsurfacesediments,celllossesduetopredationbyprotozoaorcelllysisbybacteriophagecanalsomasktrue rates of cell multiplication (1, 2).A number of different techniques have been used to assessmicrobial growth rates in natural environments. For example, in