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.

中文翻译：

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青藏高原本土和引进反刍动物的产甲烷菌多样性。

宿主因素被认为对瘤胃中古细菌群落的形成很重要，但是在相同的环境条件下，几乎没有进行对照研究来证明宿主物种间的差异。一项研究旨在调查在高海拔青藏高原上在相似条件下饲养和饲养的两种土著（y牛和藏绵羊）和两种引入的家养反刍动物（牛和杂种绵羊）的瘤胃中产甲烷菌群落的结构。尽管所有全球反刍动物中甲基溴化细菌的含量通常都很高，但甲基化营养型甲烷甲烷菌科是所有动物中的主要古细菌群。此外，在来自Mmc的Methanomassiliicoccaceae科成员中。第10组和Mmc。与Mmc相比，第4组在青藏高原反刍动物中占主导地位。在其他反刍动物中，第12组的含量最高。与较大的反刍动物相比，小的反刍动物呈现出属于甲烷菌科的最大数量的序列。尽管反刍动物的产甲烷菌群落结构不同，但在这种环境下动物之间存在惊人的相似性。这表明，与寄主差异相比，青藏高原的极端环境条件和饮食等因素可能对瘤胃产甲烷菌群落产生更大的影响。