André-Denis G. Wright

TL;DR: The methanogens identified in the rumens of cattle and sheep, as well as a number of methane mitigation strategies that have been effective in vivo are described.

TL;DR: The molecular diversity of rumen methanogens in sheep in Australia was investigated by using individual 16S rRNA gene libraries prepared from the rumen contents obtained from six merino sheep grazing pasture, and five sheep fed a lucerne hay-based diet.

TL;DR: Methane emissions from sheep immunized with an anti-methanogen vaccine were significantly lower than methane emissions from non-immunized sheep, and the effectiveness of two different vaccine formulations (VF) on methane abatement was tested, and methane emissions measured using a closed-circuit respiration chamber and the sulphur-hexafluoride tracer technique were compared.

TL;DR: It is difficult to conclude whether the geographical isolation between these two herds or differences between the two finishing diets directly influenced community structure in the rumen, but nine possible new species were identified from the two clone libraries, including two new species belonging to the order Methanobacteriales and a new genus/species within the orders Methanosarcinales.

TL;DR: TheRumen microbiome and cow genome could be targeted independently, by breeding low methane-emitting cows and in parallel, by investigating possible strategies that target changes in the rumen microbiome to reduce CH4 emissions in the cattle industry.