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The dominant four phyla ( Proteobacteria , Firmicutes , Bacteroidetes , and Actinobacteria ) identified comprised over 99% of bacterial community.
Regardless of the sample to sample variations and regional differences, consistent taxa were represented by 4 phyla with the phyla Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes which are especially dominant.
To date, it is well known that microbial communities associated to microbialites are dominated by bacterial phyla including: Proteobacteria, Bacteroidetes, Cyanobacteria, Planctomycetes, Verrucomicrobia and Actinobacteria, among others (Papineau, Walker, Mojzsis, & Pace, 2005; Baumgartner et al.
Taxonomy-based analysis showed that the predominance of the major phyla did not change in response to the omega-3 rich diet (Figure 1) although the bacterial diversity was minimally reduced in response to the omega-3 rich diet (Figure 2).
Rarefaction graph revealed that the sampling effort on orders and phyla (respectively 90 and 80% similarity) was satisfactory, since curve reached the asymptote.
It contains tens of trillions of microorganisms, including at least 1,000 different species of known bacteria, the vast majority of which belong to the phyla Firmicutes and Bacteroidetes (Ley et al.
Recent evidence suggests that obesity is influenced by specific bacterial phyla present in the human gut that have increased energy harvesting capabilities.
Conversely in the gluten-free samples, there was variation of dominant phyla among individual zebrafish, showing Fusobacteria (61.
In general, the oral microbiome is diverse, and oral wash samples (surrogates for the oral flora) from 20 healthy subjects analyzed using high-throughput methods revealed the presence of 5 major phyla (Firmicutes, Proteobacteria, Bacteroidetes, Actinobacteria, and Fusobacteria) and that Streptococcus, Veillonella, Leptotrichia, Prevotella, and Haemophilus genera were the most abundant.
Group 1 (buccal mucosa, keratinized gingiva, and hard palate) demonstrated a predominance of organisms from the phylum Firmicutes (with a very high proportion [approximately 50%] from the genus Strepto coccus) followed in relative abundance by the phyla Proteobacteria, Bacteroidetes and either Actinobacteria or Fusobacteria
A total of 156 non-overlapping taxa belonging to 12 phyla were found in the Estonian psammon communities, 69 taxa occurring in the Gulf of Finland and 123 taxa in lakes (Table 2).