Figure 3From: Long-term surveillance of sulfate-reducing bacteria in highly saline industrial wastewater evaporation pondsPhylogenetic comparison of dsrA gene sequences retrieved from industrial wastewater evaporation ponds in 2005 and 2007. Geometric forms indicate the sequences according to the sampling date: black triangle, 2005 and black circle, 2007. Tree was constructed by the Neighbor-Joining method [19] with the Mega package [21] using partial dsrA sequences. The numbers in parentheses indicate the total number of similar clones on the basis of ≥ 97% identity for each representative sequence. The bar represents ten substitutions per 100 nucleotide positions. Bootstrap probabilities [20] are indicated at branch nodes.Back to article page