TABLE 1.

Results of simple and partial Mantel tests between distance matrices for genotypic dissimilarity, environmental dissimilarity, geographic distance, and temporal separation of isolates from each sampling event^a

Dependent variable	Independent variable	Controlling for	r	P value
Environmental dissimilarity	Temporal separation		0.081	0.0034
Geographic distance	Environmental dissimilarity		0.141	0.0019
Genotypic dissimilarity	Water temperature		0.023	0.1094
Genotypic dissimilarity	Salinity		0.033	0.0366
Genotypic dissimilarity	Turbidity		−0.010	0.3094
Genotypic dissimilarity	Ammonium		0.049	0.0078
Genotypic dissimilarity	Environmental dissimilarity		0.061	0.0004
Genotypic dissimilarity	Environmental dissimilarity	Geographic distance	0.047	0.0074
Genotypic dissimilarity	Environmental dissimilarity	Temporal separation	0.053	0.0028
Genotypic dissimilarity	Geographic distance		0.102	0.0001
Genotypic dissimilarity	Geographic distance	Environmental dissimilarity	0.094	0.0001
Genotypic dissimilarity	Geographic distance	Temporal separation	0.097	0.0001
Genotypic dissimilarity	Temporal separation		0.101	0.0001
Genotypic dissimilarity	Temporal separation	Geographic distance	0.095	0.0001
Genotypic dissimilarity	Temporal separation	Environmental dissimilarity	0.096	0.0001

^aSimple and partial Mantel test data are shown in rows containing two and three comparison variables, respectively. All correlations were statistically significant (P < 0.05 with false discovery rate correction), except for the simple Mantel tests between genotypic dissimilarity and water temperature and between genotypic dissimilarity and turbidity. Ranges of r in the text represent the individual correlations of geographic, environmental, or temporal distance with genotypic dissimilarity when both remaining factors were accounted for.