Peer reviewed open access journal. The taxonomic framework has been available for public use since 23 July 2015 (see https://www.arb-silva.de/documentation/release-123/). The taxonomic revisions have been propagated into subsequent releases, currently at SILVA 132 (https://www.arb-silva.de/documentation/release-132/)

The release of SILVA 123 included the following message:
?Rumen microbial community data, generated as part of the Global Rumen Census and Hungate1000 projects (PIs Gemma Henderson, Bill Kelly, Sinead Leahy, and Peter Janssen, Rumen Microbiology Team, AgResearch Ltd, New Zealand), were mapped onto the SSURef NR guide tree. Clusters that contained rumen sequence data, but were taxonomically poorly defined, were given improved taxonomic strings and names, reflective of the types of microbes found within (e.g., strain names or designated as an uncultured group (UCG)). As a result, the taxonomic framework better reflects the diversity of microbes found in the rumen and can be used to assign a more precise taxonomic identity to rumen microbial sequence data. This work was funded by the New Zealand Government as part of its support for the Global Research Alliance on Agricultural Greenhouse Gases.