Sulfate reducing bacteria in microbial mats: Changing paradigms, new discoveries

Baumgartner, Laura K.; Reid, R. Pamela; Dupraz, Christophe; Decho, Alan W.; Buckley, Daniel H.; Spear, John R.; Przekop, Kristen M.; Visscher, Pieter T.

doi:10.1016/j.sedgeo.2005.12.008

Cited by 363 publications

(251 citation statements)

References 77 publications

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“…Periods of calcite deposition were generally consistent with changes in the calcite saturation index (SI) of surface waters (Fig. 5) (Baumgartner et al 2006). The most positive values were recorded from April to September while negative values were characteristic for winter, when the lake was ice-covered.…”

Section: Modern Sedimentationsupporting

confidence: 66%

Conditions for deposition of annually laminated sediments in small meromictic lakes: a case study of Lake Suminko (northern Poland)

et al. 2011

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A three-year field study was conducted in Lake Suminko, Poland, to gain an understanding of the limnological variables that influence the formation and spatial extent of annually laminated sediments in the lake. The water body is divided into three depth strata, the mixolimnion, chemocline and monimolimnion, each defined by distinct values of temperature, electrical conductivity and oxygen concentration. Typical for meromictic lakes, the monimolimnion remains perennially anoxic and is rich in dissolved solids and nutrients. The annual pattern of particle flux in Lake Suminko is closely related to biochemical processes in the euphotic zone. During winter months we observed very low accumulation rates of non-carbonaceous matter, while during the rest of the year, three periods of calcite deposition were recorded (April, July-August, and OctoberNovember). The periods of high calcite deposition corresponded with algal blooms and oxygen concentration maxima. Two principal factors contribute to meromixis in Lake Suminko: (1) the basin is sheltered, preventing wind mixing, and (2) biochemical processes in the lake associated with high lacustrine productivity. Meromictic conditions must control the formation and preservation of laminated sediments in the lake because preserved laminations occur only in areas where the lake floor lies below monimolimnetic waters.

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Section: Modern Sedimentationsupporting

confidence: 66%

Conditions for deposition of annually laminated sediments in small meromictic lakes: a case study of Lake Suminko (northern Poland)

et al. 2011

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“…Whole-cell FISH surveys of microbial assemblages within the mat, focusing on sulfate reducers and other known monophyletic sulfur-metabolizing guilds, allow for micron-scale mapping of the spatial distribution of these organisms (for example, Minz et al, 1999a;Wieland et al, 2003;Tonolla et al, 2005;Baumgartner et al, 2006). The spatial relationships of mat-associated SRB populations ( Figure 5) have not been previously reported within these highly structured microbial communities at this resolution and continuous physical extent (412 mm 2 ).…”

Section: Srb Spatial Distributionmentioning

confidence: 83%

“…We have focused our study on sulfur cycling, in particular sulfate reduction, one of the dominant metabolisms within microbial mats (Canfield and Des Marais, 1993;Teske et al, 1998;Baumgartner et al, 2006). Mat-associated sulfate-reducing bacteria (SRB) were initially considered to be strict anaerobes residing below the oxic/anoxic chemocline, which was inhabited by sulfide oxidizers and presumably sulfur disproportionators that catabolize intermediate valence compounds (S 0 , S 2 O 3 2À , SO 3 2À ) .…”

Section: Introductionmentioning

confidence: 99%

“…Mat-associated sulfate-reducing bacteria (SRB) were initially considered to be strict anaerobes residing below the oxic/anoxic chemocline, which was inhabited by sulfide oxidizers and presumably sulfur disproportionators that catabolize intermediate valence compounds (S 0 , S 2 O 3 2À , SO 3 2À ) . The discovery of abundant SRB and elevated sulfate-reduction rates in the oxic surface layers of mats indicates a more complicated spatial organization of the different sulfur-cycling metabolisms (Frund and Cohen, 1992;Canfield and Des Marais, 1993;Krekeler et al, 1997;Minz et al, 1999a;Sigalevich et al, 2000;Wieringa et al, 2000;Baumgartner et al, 2006). Indeed, among SRB, there is evidence for vertical segregation between different phylogenetic clades in microbial mats (Risatti et al, 1994;Minz et al, 1999b;Decho et al, 2005;Wieland et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Micron-scale mapping of sulfur cycling across the oxycline of a cyanobacterial mat: a paired nanoSIMS and CARD-FISH approach

et al. 2008

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The metabolic activities of microbial mats have likely regulated biogeochemical cycling over most of Earth's history. However, the relationship between metabolic activity and the establishment of isotopic geochemical gradients in these mats remains poorly constrained. Here we present a parallel microgeochemical and microbiological study of micron-scale sulfur cycling within hypersaline microbial mats from Guerrero Negro, Baja California Sur, Mexico. Dissolved sulfide within the mats was captured on silver discs and analyzed for its abundance and d 34 S isotopic composition using high-resolution secondary ion mass spectrometry (nanoSIMS). These results were compared to sulfide and oxygen microelectrode profiles. Two-dimensional microgeochemical mapping revealed well-defined laminations in sulfide concentration (on scales from 1 to 200 lm), trending toward increased sulfide concentrations at depth. Sulfide d 34 S decreased from B þ 10% to À20% in the uppermost 3 mm and oscillated repeatedly between À10% and À30% down to a depth of 8 mm. These variations are attributed to spatially variable bacterial sulfate reduction within the mat. A parallel examination of the spatial distribution of known sulfate-reducing bacteria within the family Desulfobacteraceae was conducted using catalyzed reporter deposition fluorescence in situ hybridization. Significant concentrations of Desulfobacteraceae were observed in both oxic and anoxic zones of the mat and occurred in several distinct layers, in large aggregates and heterogeneously dispersed as single cells throughout. The spatial distribution of these microorganisms is consistent with the variation in sulfide concentration and isotopic composition we observed. The parallel application of the methodologies developed here can shed light on micronscale sulfur cycling within microbially dominated sedimentary environments.

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“…It is pos si ble that the quan tity and qual ity of organic car bon can strongly af fect the SRB me tab o lism (Koschorreck, 2008). More over, some anal y ses in di cate the abil ity of SRB to grow un der micro aerophilic con di tions, par tic ularly in bac te rial com mu ni ties (Baumgartner et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

Geomicrobiology of Acid Mine Drainage in the weathering zone of pyrite-bearing schists in the Rudawy Janowickie Mountains (Poland)

Borkowski

Parafiniuk

Wolicka

et al. 2013

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We re port geomicrobiological anal y sis of acid wa ter res er voirs and Acid Mine Drain age (AMD) de vel oped in the weath er ing zone of py rite-bear ing schists near the closed-down py rite mine in Wieoeciszowice (southwest ern Po land). The anal y sis focused on two res er voirs char ac ter ized by dif fer ent phys i cal and chem i cal prop er ties (pH, re dox po ten tial, con tent of sulphates and heavy met als), em pha siz ing geomicrobiological re la tion ships tak ing place in this AMD set ting and de scrib ing the mi cro bi o log i cal pro cesses that sig nif i cantly in flu ence biogeochemical cy cles of sul phur and iron in the wa ter res er voirs ana lysed. The res er voir wa ter also har bours nu mer ous large, or ga nized mi cro bial struc tures in the form of stream ers, studied in de tail here us ing op ti cal and elec tron mi cros copy and by mi cro bi o log i cal cul ti va tion and mo lec u lar meth ods. The Wieoeciszowice mine slime stream ers are char ac ter ized by the co-oc cur rence of typ i cal chemolithoautotrophic mi cro or ganisms ox i diz ing sul phur and iron to gether with sul phate-re duc ing bac te ria. These struc tures prob a bly de pend on the oc currence of iron(II) in the sur round ing en vi ron ment.

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Sulfate reducing bacteria in microbial mats: Changing paradigms, new discoveries

Cited by 363 publications

References 77 publications

Conditions for deposition of annually laminated sediments in small meromictic lakes: a case study of Lake Suminko (northern Poland)

Conditions for deposition of annually laminated sediments in small meromictic lakes: a case study of Lake Suminko (northern Poland)

Micron-scale mapping of sulfur cycling across the oxycline of a cyanobacterial mat: a paired nanoSIMS and CARD-FISH approach

Geomicrobiology of Acid Mine Drainage in the weathering zone of pyrite-bearing schists in the Rudawy Janowickie Mountains (Poland)

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