Bacterial and phage population dynamics in soil.

<p>Mean densities (±SEM) of (A) <i>P</i>. <i>fluorescens</i> SBW25 population (colony forming units·g^-1 soil) in absence (□) and presence (■) of phages, and (B) phage SBW25ø2 population (plaque forming units·g^-1 soil). Solid and dashed lines correspond to bacteria and phage population densities under nutrient addition or not, respectively.