S1 Fig. Welwitschia plants dotted across an arid landscape (left). The exposed radial root system
of a Welwitschia plant (right).
S2 Fig. Rarefaction curves. a) bacteria, b) fungi. Sample nomenclature is as in S1 Table.
S3 Fig. Bar graph showing the phylum-level distribution of (a) bacterial and (b) fungal
OTUs (97% cutoff). The taxonomic affiliation was performed using the Ribosomal Database
Project Classifier (bacteria) and the UNITE database (fungi).
S4 Fig. Venn diagram showing the number of shared phylotypes observed between the rhizosphere
samples. a) bacteria, b) fungi. Sample nomenclature is as in S1 Table.
S1 Table. Bacterial diversity. Sample nomenclature indicates the sample type (S = bulk soil;
R = rhizosphere), replicate (S = 1 to 5, R = 1 to 3) and pseudoreplicate (a, b).
S2 Table. Fungal diversity. Sample nomenclature is as in S1 Table.