Bacterial microcosms obey Taylor's law: effects of abiotic and biotic stress and genetics on mean and variance of population density

Ecological Processes

Table 2 Analysis of covariance after sequential removal of nonsignificant (p > 0.1) factors from the full model

Source	df	Mean squares	F	P
Log mean	1	1.555	14.30	0.0008
Treatment	4	0.707	6.49	0.0008
(Rif+, Rif-) strain	1	0.148	1.36	0.2533
Treatment × log mean	4	1.390	3.19	0.0280
(Rif+, Rif-) strain × log mean	1	0.408	3.75	0.0630
Residual	28	0.109

Analysis of covariance of the log₁₀ variance of bacterial density, as a function of the log₁₀ mean density, treatment (rifampicin, phage, rifampicin plus phage, control, ancestor), and bacterial resistance strain (Rif+, Rif-), in a minimal model.