Figure 4

Characteristics of the rhizosphere/core microbiome. (A,B) Rhizosphere/core OTUs common to all the soil types of the toposequence. (A) The relative abundance of the core rhizosphere was calculated as the percentage of shared OTUs and shared sequences (shared seqs) among the three soil types (Calcaric, Eutric and Hyperdystric). (B) Taxonomic affiliation of the core rhizosphere and relative distribution in each soil type and in average view of the three soil types. (C,D) Rhizosphere/core OTUs common to the acidic soil types. (C) The relative abundance of the core rhizosphere was calculated as the percentage of shared OTUs and shared sequences among the two acidic soil types (Eutric and Hyperdystric). (D) Taxonomic affiliation of the core rhizosphere and relative distribution in each soil type and in average view of the two acidic soil types. For each analysis concerning the shared OTUs (A and C), the relative percentage and the number of OTUs are presented between brackets. For each analysis concerning the shared sequences (A and C), the relative percentage and the number of sequences are presented between brackets. Samples are referred as follow: Calcaric.Rh: Calcaric (Rhizosphere); Eutric.Rh: Eutric (Rhizosphere); Hyperdystric.Rh: Hyperdystric (Rhizosphere). For both shared OTUs (OTUs shared by the samples) and shared sequences (number of sequences corresponding to the shared OTUs), data are presented in relative abundance and as absolute value.