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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
Microbial Reduction of Fe(III) in Acidic Sediments: Isolation of Acidiphilium cryptum JF-5 Capable of Coupling the Reduction of Fe(III) to the Oxidation of Glucose
The collective results indicate that the in situ reduction of Fe(III) in acidic sediments can be mediated by heterotrophicAcidiphilium species that are capable of coupling the reduction ofFe( III) to the complete oxidation of a large variety of substrates including glucose and H2. Expand
Electron flow in an iron‐rich acidic sediment—evidence for an acidity‐driven iron cycle
The anoxic sediment of an acidic (pH ∼3) iron- and sulfate-rich lake and its pore water was studied with respect to the turnover rates of solid and dissolved iron and sulfur species. HighExpand
Microarray and Functional Gene Analyses of Sulfate-Reducing Prokaryotes in Low-Sulfate, Acidic Fens Reveal Cooccurrence of Recognized Genera and Novel Lineages
Low-sulfate, acidic fens in the Lehstenbach catchment in the Fichtelgebirge mountains in Germany are unusual habitats for sulfate-reducing prokaryotes that have been postulated to facilitate the retention of sulfur and protons in these ecosystems. Expand
Reduction processes in forest wetlands: Tracking down heterogeneity of source/sink functions with a combination of methods
Wetlands are considered to be the biggest unknowns regarding the influence of global climate change on element dynamics, so knowledge of processes and conditions controlling sink and source functionsExpand
Microbial cycling of iron and sulfur in acidic coal mining lake sediments
Lakes caused by coal mining processes are characterized by low pH, low nutrient status, and high concentrations of Fe(II) and sulfate due to the oxidation of pyrite in the surrounding mine tailings.Expand
Ecological consequences of the phylogenetic and physiological diversities of acetogens
This mini-review will highlight a few of the physiological and ecological realities of acetogens, and will focus on: (i) metabolic diversities and regulation, (ii) phylogenetic diversity and molecular ecology, and the capacity of acetogenic species to cope with oxic conditions under both laboratory and in situ conditions. Expand
pH Gradient-Induced Heterogeneity of Fe(III)-Reducing Microorganisms in Coal Mining-Associated Lake Sediments
The results demonstrated that the upper acidic sediment was inhabited byacidophiles or moderate acidophiles which can also reduce Fe(III) under slightly acidic conditions, and the majority of Fe( III) reducers inhabiting the slightly acidic sediment had only minor capacities to be active under acidic conditions. Expand
Ecophysiology of Fe-Cycling Bacteria in Acidic Sediments
The variety of acidophilic microorganisms that are responsible for iron cycling in acidic environments are highlighted, extending the results of recent laboratory-based studies that showed this trait to be widespread among acidophiles. Expand
Impact of manipulated drought and heavy rainfall events on peat mineralization processes and source‐sink functions of an acidic fen
[1] Climate change models predict changes in precipitation patterns over the next several decades for northern temperate regions. Resulting fluctuations of the water level may drastically affect theExpand