Figure 5
From: Contribution of ammonia oxidation to chemoautotrophy in Antarctic coastal waters
Phylogenetic analysis of Archaea amoA sequences retrieved from the study area. Partial sequences (359 bp) of Thaumarchaeota amoA genes obtained by high-throughput sequencing were aligned against the Pester et al. (2012) database and the neighbor-joining tree was constructed in ARB. OTUs were defined at 97% similarity. Numbers following each OTU give the number of sequences and % of total sequences it represents. Additional notations apply to four major clades to indicate the % of sequences in these clades from each water mass sampled (AASW—green; WW—blue; CDW—red). Shading of trapezoids representing sequences assigned to four major clades indicates the relative contribution of sequences from AASW+WW (blue) versus all CDW (red) to these clades. Dashed boxes delineate archaeal amoA groups A (surface water) and B (deep water) as defined in Francis et al. (2005). Only bootstrap values ⩾50% (of 1000 iterations) are shown.
