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. 2011 Oct 18;94(1):247–259. doi: 10.1007/s00253-011-3636-1

Fig. 2.

Fig. 2

Fig. 2

Phylogenetic tree split into Nitrosomonas- (a) and Nitrosospira-related (b) ones constructed based on bacterial amoA gene sequences from the various surface sediments in the Mai Po Nature Reserve marshes sediments, the Pearl River Estuary and the northern South China Sea sediments with most similar sequences from GenBank through the neighbor-joining (NJ) method. Numbers at the nodes represent the significant bootstrap values (>50) via 1,000 replicates test. Branch lengths correspond to sequence differences as indicated by the scale bar (2% nucleotide substitution)