Inferred phylogenetic relationships between environmental sequences from East Hill Bridge (EHB) and Colne Point (CP) sediments, reference taxa and available environmental clones. Logdet/Paralinear distances tree based on 940 alignable nucleotides using 56% of the sites, rooted using T. acidophilum (not shown on tree). Bootstrap support values (1000 replicates) above 50% are shown at nodes.