Figure 5-3: Computer-simulated chemostats. Panel A: Chemostats were simulated employing the method and parameter values of Bohannan and Lenski (14). Time steps here are 1 min rather than 3 min; the initial host (solid lines) and phage (dotted lines) densities are 10⁴/ml and 10⁵/ml, respectively. Unless otherwise noted the limiting nutrient is glucose, which is found in the chemostat reservoir at a density of 0.5 mg/liter. Panel B shows the same chemostat (as panel A) though with the phage adsorption constant reduced by one half. Panel C shows the same chemostat (as panel A) but with one-half as much limiting glucose present within the virtual chemostat reservoir. Panel D shows the same chemostat (as panel A) except with the phage burst size reduced by one half. Phage and bacterial densities during simulations were sampled for inclusion in graphs once every 30 min. These simulated chemostats contain no phage-resistant bacteria or other bacterial refuges from phage attack. Extinction is assumed to occur at or below densities of 10^-2/ml. (for better image quality, click here for tif image, which may be quite large; may also require screen refreshing plus special software to view; or view larger tif in separate window)

Figure 5-1, Figure 5-2a, Figure 5-2b, Figure 5-2c, Figure 5-2d, Figure 5-3 ( a,  b,  c,  d )

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