Figure 3

Canonical correlation analysis of ß-AOB community composition and environmental parameters showing that the communities form two clusters with exception of the autumn samples from Sandauhaufen (S) and Hansahafen (H). If the Bonferroni corrected padj was < 0.05, a given parameter was included. Cadmium, zinc and water depth explain 42.7% (adjusted) of the compositional variation among the analyzed sites which is interpreted as a co-correlation caused by the coupled transport of ß-AOB and heavy metals along the river transect, investigated. Analyses are based on amoA amplicons.