Effect of plant secondary metabolites on rumen methanogens
and methane emissions by ruminants.
are very diverse in terms of phylogeny and ecology.
Among the archaea-related proteins, 667 proteins were related to 15 genera of cultivable archaeal methanogens
. As shown in Figure S5(a), M.
Verstraete, "Methanosarcina: the rediscovered methanogen
for heavy duty biomethanation," Bioresource Technology, vol.
Methane can be generated in two ways by two types of methanogens
: (a) acetoclastic methanogens
that produce methane from acetic acid and (b) hydrogenotrophic methanogens
that utilize hydrogen to reduce carbon dioxide.
Mountfort, Asher, Mays and Tiedje (1980) suggested that the function of the SRB depends on the existing levels of sulfates, because they oxidize acetate at high concentrations, whereas producing acetate at low levels of sulfates releasing substrate for methanogens
. The experiments of Banat and Nedwell (1983) with inhibitors of sulfate-reduction showed that the SRB are the main microorganisms responsible for the oxidation of acetate to C[O.sub.2] in salt marsh sediments, while the proportion of acetate that was metabolized to methane was negligible.
Pramanik P, Kim PJ (2013) Effect of limited nickel availability on methane emission from EDTA treated soils: Coenzyme M an alternative biomarker for methanogens
. Chemosphere 90, 873-876.
A concern with food additives is that the methanogens
in the rumen might adapt to their new diet after a time and resume methane production at the same level.
"The rumen methanogens
turned out to be highly similar species in all rumens across the world," AgResearch scientist Dr Peter Janssen said in the statement.
Manure and crop residues probably stimulated the activity of methanogen
that produce C[H.sub.4].
The current study monitored through quantitative PCR (qPCR) the changes in the populations of total bacteria, total methanogens
and the proteolytic bacteria B.
"We have advanced that in the Niger Delta, a group of organisms known as methanogens
are now playing major roles in bio-corrosion episodes We have also advanced that oil field microorganisms are getting more and more resistant to biocides used to control corrosion and there is need for alternative mitigation approaches."