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Archaea
Volume 2016, Article ID 5916067, 10 pages
http://dx.doi.org/10.1155/2016/5916067
Research Article

Methanogen Diversity in Indigenous and Introduced Ruminant Species on the Tibetan Plateau

1School of Public Health, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
2School of Life Science, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
3CSIRO, Agriculture Flagship, Queensland Bioscience Precinct, 306 Carmody Road, St Lucia, QLD 4067, Australia

Received 11 February 2016; Accepted 11 April 2016

Academic Editor: Hans-Peter Klenk

Copyright © 2016 Xiao Dan Huang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Host factors are regarded as important in shaping the archaeal community in the rumen but few controlled studies have been performed to demonstrate this across host species under the same environmental conditions. A study was designed to investigate the structure of the methanogen community in the rumen of two indigenous (yak and Tibetan sheep) and two introduced domestic ruminant (cattle and crossbred sheep) species raised and fed under similar conditions on the high altitude Tibetan Plateau. The methylotrophic Methanomassiliicoccaceae was the predominant archaeal group in all animals even though Methanobrevibacter are usually present in greater abundance in ruminants globally. Furthermore, within the Methanomassiliicoccaceae family members from Mmc. group 10 and Mmc. group 4 were dominant in Tibetan Plateau ruminants compared to Mmc. group 12 found to be highest in other ruminants studied. Small ruminants presented the highest number of sequences that belonged to Methanomassiliicoccaceae compared to the larger ruminants. Although the methanogen community structure was different among the ruminant species, there were striking similarities between the animals in this environment. This indicates that factors such as the extreme environmental conditions and diet on the Tibetan Plateau might have a greater impact on rumen methanogen community compared to host differences.