1992
DOI: 10.1128/aem.58.4.1164-1174.1992
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Microsensor Measurements of Sulfate Reduction and Sulfide Oxidation in Compact Microbial Communities of Aerobic Biofilms

Abstract: The microzonation of 02 respiration, H2S oxidation, and so42reduction in aerobic trickling-filter biofilms was studied by measuring concentration profiles at high spatial resolution (25 to 100 ,um) with microsensors for 02, S2, and pH. Specific reaction rates were calculated from measured concentration profiles by using a simple one-dimensional diffusion reaction model. The importance of electron acceptor and electron donor availability for the microzonation of respiratory processes and their reaction rates wa… Show more

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Cited by 254 publications
(112 citation statements)
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References 63 publications
(67 reference statements)
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“…(Paerl & Pinckney, 1996). It also has been documented in the biofilm of an aerobic trickling filter (Kuhl & Jorgensen, 1992), which is more similar to the biofilms occurring in hyporheic zones in that it was micrometres thick and exposed to a constant interstitial flow of oxygenated water; here oxidation of H2S accounted for 48% of total oxygen consumption. This suggests that the micrometres-thick epilithic biofilms within stream beds also may create suitable micro-environments, in which chemolithotrophic processes can play an important role in subsurface oxygen dynamics and might contribute significantly to hyporheic microbial production.…”
Section: Inorganic Sources Of Energymentioning
confidence: 76%
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“…(Paerl & Pinckney, 1996). It also has been documented in the biofilm of an aerobic trickling filter (Kuhl & Jorgensen, 1992), which is more similar to the biofilms occurring in hyporheic zones in that it was micrometres thick and exposed to a constant interstitial flow of oxygenated water; here oxidation of H2S accounted for 48% of total oxygen consumption. This suggests that the micrometres-thick epilithic biofilms within stream beds also may create suitable micro-environments, in which chemolithotrophic processes can play an important role in subsurface oxygen dynamics and might contribute significantly to hyporheic microbial production.…”
Section: Inorganic Sources Of Energymentioning
confidence: 76%
“…Because the matrix isolates microcolonies from the bulk water, biofilms allow metabolic activities which are quite different from those expected from the physicochemical parameters of the bulk water (Paerl & Pinckney, 1996). Thus, as mentioned earlier, anaerobic activities are able to occur in aerobic habitats, and aerobic and anaerobic processes, such as sulphide oxidation and sulphate reduction, can occur in different layers of the same biofilm (Kuhl & Jorgensen, 1992). Because the matrix maintains a close proximity between microcolonies of different bacterial types, sites of specific limited niches can be created.…”
Section: Biofilms: Making the Story More Complexmentioning
confidence: 99%
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