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Hydrogenotrophic Methanogenesis by Moderately Acid-Tolerant Methanogens of a Methane-Emitting Acidic Peat
In this acidic bog peat, H2 is an important substrate for acid-tolerant methanogens, interspecies hydrogen transfer is involved in the degradation of organic carbon, the accumulation of protonated volatile fatty acids inhibits methanogenesis, and meetinghanogenesis might be due to the activities of methanogenic that are phylogenetic members of the Methanobacteriaceae, Methanomicrobiales, and Methanosarcinaceae. Expand
Dechloromonas denitrificans sp. nov., Flavobacterium denitrificans sp. nov., Paenibacillus anaericanus sp. nov. and Paenibacillus terrae strain MH72, N2O-producing bacteria isolated from the gut of
Four N(2)O-producing facultative aerobes, ED1(T), ED5 (T), MH21(T) and MH72, were isolated from the gut of the earthworms and are proposed as type strains of the novel species Dechloromonas denitrificans sp. Expand
As the worm turns: the earthworm gut as a transient habitat for soil microbial biomes.
The gut of the earthworm constitutes a mobile anoxic microzone to which the microorganisms of aerated soils are subjected, and the impact that soil macrofauna might have on terrestrial nitrogen cycle processes via their transient hosting of ingested prokaryotes is illustrated. Expand
Trophic links between fermenters and methanogens in a moderately acidic fen soil.
The collective results suggest that this moderately acidic fen harbours phylogenetically diverse, moderately acid tolerant fermenters (both facultative aerobes and obligate anaerobes) that are trophically linked to methanogenesis. Expand
Contrasting denitrifier communities relate to contrasting N2O emission patterns from acidic peat soils in arctic tundra
The collective data indicate that the contrasting N2O emission patterns of cryoturbated and unturbated peat soils are associated with contrasting denitrifier communities. Expand
The Earthworm Gut: an Ideal Habitat for Ingested N2O-Producing Microorganisms
The hypothesis that the in situ conditions of the earthworm gut activate ingested N2O-producing soil bacteria during gut passage is supported, and a combination of supplements yielded rates greater than that obtained mathematically for single supplements, suggesting that the maximum rates observed were due to synergistic effects of supplements. Expand
Intermediary ecosystem metabolism as a main driver of methanogenesis in acidic wetland soil.
The main objective of this review is to evaluate the concept of intermediary ecosystem metabolism in context with recent work aimed at resolving the complex trophic interactions of a methane-emitting peatland. Expand
N2O-Producing Microorganisms in the Gut of the Earthworm Aporrectodea caliginosa Are Indicative of Ingested Soil Bacteria
The results of this study suggest that most of the N2O emitted by earthworms is due to the activation of ingested denitrifiers and other nitrate-dissimilating bacteria in the gut lumen. Expand
Competing Formate- and Carbon Dioxide-Utilizing Prokaryotes in an Anoxic Methane-Emitting Fen Soil†
The results highlight the unresolved microbial diversity of the fen Schlöppnerbrunnen, suggest that differing taxa competed for the same substrate, and indicate that Methanocell Families, Methanobacteriaceae, Methanosarcinaceae, and Methanosaetaceae were linked to the production of methane, but they do not clearly resolve the taxa responsible for the apparent conversion of formate to acetate. Expand
The role of nitrifier denitrification in the production of nitrous oxide revisited
Abstract Nitrifier denitrification is the reduction of nitrite (NO2−) by ammonia-oxidizing bacteria. This process may account for up to 100% of nitrous oxide (N2O) emissions from ammonium (NH4+) inExpand