American Society for Microbiology, Applied and Environmental Microbiology, 8(75), p. 2566-2572, 2009
DOI: 10.1128/aem.02260-08
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ABSTRACT Prokaryotic diversity was investigated near the inlet and outlet of a plug-flow reactor. After analyzing 800 clones, 50 bacterial and 3 archaeal phylogenetic groups were defined. Clostridia (>92%) dominated among bacteria and Methanoculleus (>90%) among archaea. Significant changes in pH and volatile fatty acids did not invoke a major shift in the phylogenetic groups. We suggest that the environmental filter imposed by the saline conditions (20 g liter −1 ) selected a stable community of halotolerant and halophilic prokaryotes.