Microbial activity and biogeochemical cycling in a nutrient-rich meromictic acid pit lake

Wendt‐Potthoff, Katrin; Koschorreck, Matthias; Ercilla, Marta Diez; España, Javier Sánchez

doi:10.1016/j.limno.2011.10.004

Cited by 44 publications

(58 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This lake shows a relatively high nutrient content that has triggered an intense primary production in the photic part of the lake (Sánchez-España et al 2013). The presence of planktonic and benthic SRB in this lake has been reported by Wendt-Potthoff et al (2012). This presence of SRB has been later confirmed by Falagán et al (2014), who have identified Desulfomonile sp.…”

Section: Introductionsupporting

confidence: 70%

“…Chlorophyll-a peaks are attributed to mixotrophic organisms like Chlamydomonas sp. (which are able to cope with the low intensity of photosynthetically active radiation, PAR, recorded at this depth) and/or the accumulation of biomass from shallower areas (Sánchez España et al 2009;Wendt-Potthoff et al 2012). A similar relation between the location and intensity of the photosynthetic activity of Chlamydomonas acidophila and H 2 S production has been reported in the acidic Reservoir 29 (Gyure et al 1987).…”

Section: Biological Controls: Primary Production and Carbon Availabilitysupporting

confidence: 58%

“…The low pH is apparently not inhibitory for the SRB and the process is viable as long as a minimum amount of biochemically suitable carbon is provided from the photic zone and competition by Fe(III)-reducing bacteria is limited. Bacterial sulphate reduction activity has been also observed in the shallow and carbonrich litoral sediments of this lake (Wendt-Potthoff et al 2012), although that benthic activity has no evident effect in the lake water chemistry. In contrast, the carbon-deficient sediments at the lake bottom show a very limited BSR activity.…”

Section: Final Remarks and Conclusionmentioning

confidence: 73%

“…Interestingly, BSR activity takes place in the water column and is accomplished by planktonic bacteria below the redoxcline. Significant numbers of SRB have been reported to exist below the redoxcline of this lake (Wendt-Potthoff et al 2012;Falagán et al 2014). These microbes reduce SO 4 2-to H 2 S and indirectly promote a significant metal removal by precipitation of metallic sulphides.…”

Section: Final Remarks and Conclusionmentioning

confidence: 91%

“…We recently observed the occurrence of dissolved H 2 S in the water column of the meromictic mine pit lake Cueva de la Mora (Wendt-Potthoff et al 2012). This lake shows a relatively high nutrient content that has triggered an intense primary production in the photic part of the lake (Sánchez-España et al 2013).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Formation of biogenic sulphides in the water column of an acidic pit lake: biogeochemical controls and effects on trace metal dynamics

et al. 2014

Self Cite

View full text Add to dashboard Cite

Production of H 2 S by bacterial sulphate reduction in the water column of Cueva de la Mora pit lake (SW Spain) may favour an important selfmitigating capacity with respect to metal pollution. The interaction of bacterially produced H 2 S with dissolved metal(loid)s provokes the precipitation of various sulphides, which in turn form a 10 m-thick turbidity layer below the redoxcline. The main goal of this study was to identify the main factors driving the formation of these sulphide precipitates and their impact on the pit lake water quality. Given the severe geochemical conditions found in this lake (low pH, high metal concentrations), our findings may be relevant for a wide spectrum of environmental systems where BSR-based biotechnologies are applied. The water column has been studied by spatially resolved samplings and detailed chemical analyses, physicochemical profiling and geochemical modelling. The suspended particulate matter forming the turbidity has been chemically and mineralogically characterized. Our results suggest that the low pH (3.0-4.0) and the high metal concentrations are not inhibitory for the sulphate-reducing bacteria (SRB). The intensity of sulphide precipitation seems to be closely related with the activity of SRB, which in turn appear to depend on the availability of organic carbon produced in the photic zone. The relative location of oxygen and iron gradients and the redoxcline thickness are influencing the development of the sulphate reducing zone. The most common sulphides are CuS, As 2 S 3 and ZnS, though formation of some other minor phases (PbS, CdS, NiS) has been also detected and/or deduced by geochemical calculations. Metal sulphide precipitation has provoked a complete removal of Cu from the monimolimnion (though it is still present at concentrations of 5.5 mg/L in the mixolimnion) and a net decrease in highly toxic trace metals (Cd, Pb, U, Th) and metalloids (As, Sb).

show abstract

Section: Introductionsupporting

confidence: 70%

Section: Biological Controls: Primary Production and Carbon Availabilitysupporting

confidence: 58%

Section: Final Remarks and Conclusionmentioning

confidence: 73%

Section: Final Remarks and Conclusionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations