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. 2012 Apr 26;4(5):663–687. doi: 10.3390/v4050663

Table 1.

Summary of predictions as a function of phage densities in environments and phage potential to acquire bacteria sequentially within bacterial arrangements (Recall in interpreting the table that the inequality, Nt / N0 > At / A0, implies greater success over time in the face of phage-mediated predation for free bacteria versus bacteria found within arrangements while Nt / N0 < At / A0 implies the opposite). Generally, k/Inline graphic≥ 1. Calculations relevant to lower phage densities, as found in the bottom portion of the table, are not discussed until Section 2.3.3 and especially section 2.3.4.

Environmental Phage Density (P) Phage Propagation Ability Through Arrangements (Inline graphic)
Higher Lower
Higher
(bacterial losses dominate dynamics)
For
Inline graphic
[lesser or no impediments to phage propagation within arrangements]
For
Inline graphic
[impediments less than absolute]
For
Inline graphic
[e.g., abortive infections]
For
Inline graphic
[e.g., phage restriction]
Lower
(bacterial gains dominate dynamics)
For
Inline graphic
[which, as P → 0, is more likely]
graphic file with name viruses-04-00663-i017.jpg [assuming phage-independent advantages to arrangement formation, i.e., μA - μN > 0, and that μA - μN > P(Inline graphicInline graphic -k)holds, which is likely given both P → 0 and Inline graphic 0]