Heatmap showing the relative abundance of selected OTUs.

<p>The samples and OTUs are clustered according to Manhattan distances. The colors correspond to the relative abundance of the OTUs in the samples, as indicated by the color legend. The taxonomy of each OTU is provided to the lowest-level attained during the classification. Abbreviations are used to indicate class (c), order (o), suborder (so), family (f) and genus (g). Two-way ANOVA for each OTU was performed using location (L), topography (T) and location and topography (L×T). P-values of the ANOVA are indicated as follows: * (P<0.05), ** (P<0.01), *** (P<0.001).