Fig.1.

Spirochetal phylotypes of the genus Spirochaeta detected from microbial mats of the Ebro Delta and La Camargue. The information presented includes spirochetal species or phylotype clone ID and sequence accession number. Novel phylotypes are defined as those taxa that are <98.5 similar in sequence comparisons to its closest relative. Columns to the right indicate presence of phylotype in each delta at different sampling dates. Numbers in boxes represent the number of clones that the phylotype was detected in each library. Boxes with no number indicate that the phylotype was not detected at that time point. Bar = 0.02 difference in nucleotide sequence. On thousand bootstrap trees were generated and bootstrap confidence levels as percentages (only values over 50%) are shown at tree nodes.