The Phylum Proteobacteria was primarily composed of the Classes Alphaproteobacteria, Betaproteobacteria, Deltaproteobacteria and Gammaproteobacteria (23 [+ or -]4%, 8.
2016) reported that the presence of plants enhanced the abundance of Beta-, Gamma- and Deltaproteobacteria compared with non-vegetated soils.
Edwards has discovered via genomics that a few key members, particularly from the class known as the Deltaproteobacteria
, dominate this microbial community.
Furthermore, the authors noted parallels between the microbial response in oil-contaminated sediments and communities observed in natural hydrocarbon seeps, where in both cases Deltaproteobacteria
appear to assume a dominant role in degrading hydrocarbon compounds.
To date, only ten species were identified as SPOB, which belonged to class Deltaproteobacteria or Firmicutes.
Deltaproteobacteria contained two genera Syntrophobacter and Smithella.
Members of the following phyla were detected in nearly all of the samples: Actinobacteria, Bacteroidetes, Chloroflexi, Cyanobacteria, Firmicutes, and Proteobacteria (Alphaproteobacteria, Betaproteobacteria, Deltaproteobacteria
, and Gammaproteobacteria).
According to the resulting cluster analysis, a decrease in pH results in an increase in detection of Rhodobacteraceae and a decrease in detection of Bacteroidetes and Deltaproteobacteria
(Meron et al, 2011).