Ferrous iron oxidation by denitrifying bacteria in profundal sediments of a deep lake (Lake Constance)

Hauck, S

doi:10.1016/s0168-6496(01)00153-2

Cited by 25 publications

(31 citation statements)

References 26 publications

(35 reference statements)

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“…This is due to nitrate's higher energetic efficiency as an electron acceptor than iron (e.g., Hansen et al 2003;Parsons et al 2017); as nitrate must be consumed prior to the onset of iron reduction (Reed et al 2011), longer periods of anoxia are required to cause release of iron-bound P. Second, heterotrophic nitrate reduction (denitrification) coupled to the oxidation of organic matter may deplete the sediment of labile organic matter, decreasing the probability, or rate, of reductive dissolution of iron oxyhydroxides at greater sediment depth due to electron donor limitation. Third, nitrate reduction can be coupled directly to the oxidation of upward-diffusing iron(II) from more reduced sediments (e.g., Straub et al 1996;Hauck et al 2001;Melton et al 2012). This can result in the precipitation of iron(III) oxyhydroxides below the oxic zone in sediments, providing a greater barrier to upwarddiffusing P, which can decrease or prevent internal P loading.…”

Section: Nitrate Concentrations In Surface Watermentioning

confidence: 99%

Internal phosphorus loading in Canadian fresh waters: a critical review and data analysis

Orihel

Baulch

Casson

et al. 2017

Can. J. Fish. Aquat. Sci.

195

133

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Many physical, chemical, and biological processes in freshwater ecosystems mobilize the nutrient phosphorus (P) from sediments, which in turn may contribute to the formation of harmful algal blooms. Here, we critically reviewed internal P loading in Canadian fresh waters to understand the geographic patterns and environmental drivers of this important process. From 43 publications, we consolidated 618 estimates of internal P loading from Canadian freshwater ponds, lakes, reservoirs, and coastal wetlands (n = 70). Expressed in terms of total P, short-term gross rates in sediment samples (L gross ) ranged from −27 to 54 mg·m −2 ·day −1 (n = 461), while long-term net rates in whole ecosystems (L net ) ranged from −1694 to 10 640 mg·m −2 ·year −1 (n = 157). The main environmental drivers of this variation were oxygen, pH, geology, and trophic state. Internal P loading tended to be higher during the open-water season and most prominent in small prairie lakes. Priorities for future research on internal P loading should include resolving methodological problems, assessing the relative importance of different mechanisms, examining the influence of anthropogenic activities, and quantifying rates in understudied ecosystems. Résumé :De nombreux processus physiques, chimiques et biologiques dans les écosystèmes d'eau douce mobilisent le phosphore (P), un élément nutritif, des sédiments, ce qui peut favoriser la formation de fleurs d'eau néfastes. Nous avons effectué un examen critique de l'apport interne de P dans les plans d'eau douce canadiens afin de comprendre les motifs de répartition géographique et les facteurs environnementaux qui influent sur cet important processus. À la lumière de 43 publications, nous avons colligé 618 estimations de l'apport interne de P d'étangs, de lacs, de réservoirs et de milieux humides littoraux d'eau douce canadiens (n = 70). Exprimés en termes de P total, les taux d'apport de P à court terme pour les échantillons de sédiments (L gross ) vont de −27 à 54 mg·m -2 ·jour -1 (n = 461), alors que les taux nets à long terme à l'échelle de l'écosystème (L net ) vont de −1694 à 10 640 mg·m -2 ·an -1 (n = 157). Les principaux facteurs environnementaux influant sur ces variations sont l'oxygène, le pH, la géologie et l'état trophique. L'apport interne de P tend à être plus élevé durant la période d'eau libre et le plus marqué dans les petits lacs de prairie. La priorité des travaux futurs sur l'apport interne de P devrait porter sur la résolution de problèmes méthodologiques, l'évaluation de l'importance relative de différents mécanismes, l'examen de l'influence des activités humaines et la quantification des taux dans les écosystèmes sous-étudiés. [Traduit par la Rédaction]

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Section: Nitrate Concentrations In Surface Watermentioning

confidence: 99%

Internal phosphorus loading in Canadian fresh waters: a critical review and data analysis

Orihel

Baulch

Casson

et al. 2017

Can. J. Fish. Aquat. Sci.

195

133

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“…Chemolithotrophic nitrate-dependent Fe(II) oxidation was first reported by Straub et al, (1996) and has been reported in various environments since, primarily in lake sediments (Straub and BuchholzCleven, 1998;Hauck et al, 2001;Muehe et al, 2009). Although autotrophic nitrate-dependent oxidation of Fe(II) was observed in many natural habitats, to date there are only two pure cultures available: the hyperthermophilic archaeon Ferroglobus placidus (Hafenbradl et al, 1996) and the betaproteobacterium Pseudogulbenkiania sp.…”

Section: Introductionmentioning

confidence: 96%

Chemolithotrophic nitrate-dependent Fe(II)-oxidizing nature of actinobacterial subdivision lineage TM3

et al. 2013

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Anaerobic nitrate-dependent Fe(II) oxidation is widespread in various environments and is known to be performed by both heterotrophic and autotrophic microorganisms. Although Fe(II) oxidation is predominantly biological under acidic conditions, to date most of the studies on nitrate-dependent Fe(II) oxidation were from environments of circumneutral pH. The present study was conducted in Lake Grosse Fuchskuhle, a moderately acidic ecosystem receiving humic acids from an adjacent bog, with the objective of identifying, characterizing and enumerating the microorganisms responsible for this process. The incubations of sediment under chemolithotrophic nitratedependent Fe(II)-oxidizing conditions have shown the enrichment of TM3 group of uncultured Actinobacteria. A time-course experiment done on these Actinobacteria showed a consumption of Fe(II) and nitrate in accordance with the expected stoichiometry (1:0.2) required for nitratedependent Fe(II) oxidation. Quantifications done by most probable number showed the presence of 1 Â 10 4 autotrophic and 1 Â 10 7 heterotrophic nitrate-dependent Fe(II) oxidizers per gram fresh weight of sediment. The analysis of microbial community by 16S rRNA gene amplicon pyrosequencing showed that these actinobacterial sequences correspond to B0.6% of bacterial 16S rRNA gene sequences. Stable isotope probing using 13 CO 2 was performed with the lake sediment and showed labeling of these Actinobacteria. This indicated that they might be important autotrophs in this environment. Although these Actinobacteria are not dominant members of the sediment microbial community, they could be of functional significance due to their contribution to the regeneration of Fe(III), which has a critical role as an electron acceptor for anaerobic microorganisms mineralizing sediment organic matter. To the best of our knowledge this is the first study to show the autotrophic nitrate-dependent Fe(II)-oxidizing nature of TM3 group of uncultured Actinobacteria.

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“…For example, the nitrate plume could affect the redox conditions (initially reducing) of the host rock in the vicinity of the repository due to microbial nitrate reduction using clay components (e.g. organic matter, pyrite or other Fe(II)-containing minerals) as electron donor (Hauck et al 2001;Jørgensen et al 2009;Mariën et al 2011;Zhang et al 2012Zhang et al , 2013. As the reducing capacity of the undisturbed clay formation will strongly impact the speciation, the solubility, the retention and the transport properties of redox-sensitive radionuclides (Se, Tc, U, Np, Pu, etc.…”

Section: Introductionmentioning

confidence: 99%

Impact of the electron donor on in situ microbial nitrate reduction in Opalinus Clay: results from the Mont Terri rock laboratory (Switzerland)

et al. 2017

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At the Mont Terri rock laboratory (Switzerland), an in situ experiment is being carried out to examine the fate of nitrate leaching from nitrate-containing bituminized radioactive waste, in a clay host rock for geological disposal. Such a release of nitrate may cause a geochemical perturbation of the clay, possibly affecting some of the favorable characteristics of the host rock. In this in situ experiment, combined transport and reactivity of nitrate is studied inside anoxic and water-saturated chambers in a borehole in the Opalinus Clay. Continuous circulation of the solution from the borehole to the surface equipment allows a regular sampling and online monitoring of its chemical composition. In this paper, in situ microbial nitrate reduction in the Opalinus Clay is discussed, in the presence or absence of additional electron donors relevant for the disposal concept and likely to be released from nitrate-containing bituminized radioactive waste: acetate (simulating bitumen degradation products) and H 2 (originating from radiolysis and corrosion in the repository). The results of these tests indicate that-in case microorganisms would be active in the repository or the surrounding clay-microbial nitrate reduction can occur using electron donors naturally present in the clay (e.g. pyrite, dissolved organic matter). Nevertheless, non-reactive transport of nitrate in the clay is expected to be the main process. In contrast, when easily oxidizable electron donors would be available (e.g. acetate and H 2 ), the microbial activity will be strongly stimulated. Both in the presence of H 2 and acetate, nitrite and nitrogenous gases are predominantly produced, although some ammonium can also be formed when H 2 is present. The reduction of nitrate in the clay could have an impact on the redox conditions in the pore-water and might also lead to a gas-related perturbation of the host rock, depending on the electron donor used during denitrification.

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Ferrous iron oxidation by denitrifying bacteria in profundal sediments of a deep lake (Lake Constance)

Cited by 25 publications

References 26 publications

Internal phosphorus loading in Canadian fresh waters: a critical review and data analysis

Internal phosphorus loading in Canadian fresh waters: a critical review and data analysis

Chemolithotrophic nitrate-dependent Fe(II)-oxidizing nature of actinobacterial subdivision lineage TM3

Impact of the electron donor on in situ microbial nitrate reduction in Opalinus Clay: results from the Mont Terri rock laboratory (Switzerland)

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