The archaeal community consisted of sequences closely related to Euryarchaeota and Crenarchaeota in both springs.
The extent of diversity below the species level was therefore enormous and the dropping cost of sequencing allowed researchers to adapt by simply sequencing more, such that lineages representing individual sequences began to be commonly replaced by wedges in the tree [ 19] and communities (groups of sequences) were now condensed into a matrix and compared as groups [ 60].
Since TA modules such as RelBE have been observed as highly prevalent and widely distributed in free living archaea, and were identified in bacterial species from all major phylogenetic divisions in the gut microbial community, the lack of sequences homologus to the pTRACA22 RelE in dominant gut archaeal species (M. smithii and Ms. stadmanae) was surprising.
Results showed that each sample had unique microbial community, with the distribution of sequences at the phylum level highly variable.
Recent advances in high-throughput sequencing technologies have enabled the scientific community to sequence a large number of genomes.
The sequences of Aspergillus nidulans, Aspergillus fumigatus, Aspergillus oryzae, Aspergillus niger, Aspergillus clavatus, Aspergillus flavus, Aspergillus terreus, and Aspergillus fischerianus are available for the scientific community; sequencing of the genome of Aspergillus parasiticus is in progress.
Normalization of metagenomic data requires to account for the estimate of average genome sizes, relieving comparative biases introduced by differences in community structure, number of sequencing reads and sequencing read lengths between different metagenomes, as well as from sub-sampling [ 59, 60].
A crucial part of community analysis is the classification of sequences into a taxonomic framework.
A substantial number of sequences from each community had hits to known MGEs: 11,718 of 30,516 sequences from the DK community, 16,156 of 24,956 sequences from the AU community, and 15,530 of 22,662 sequences from the USA community.
It is hoped that the community of researchers interested in sequence assembly algorithms will close this gap using the FRC software, now available as part of the AMOS open-source consortium.
