PERMANOVA main tests of bacterial community composition based on Jaccard dissimilarities of ARISA profiles.

1Significant results (p (perm)Displayed are tests for the factors ‘season’, ‘dilution’, ‘pH’ and their interactions and the partitioning of multivariate variation. p-values were obtained using type III sums of squares and 999 permutations under the full model. d.f.: degrees of freedom, SS: sums of squares, Sq. root: square root of the component of variation attributable to that factor in the model, in units of Jaccard dissimilarities.