The influence of goethite and gibbsite on soluble nutrient dynamics and microbial community composition

Heckman, Katherine; Welty-Bernard, Amy; Vázquez‐Ortega, Angélica; Schwartz, Egbert; Chorover, Jon; Rasmussen, Craig

doi:10.1007/s10533-012-9715-2

Cited by 27 publications

(23 citation statements)

References 73 publications

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“…In general, the characteristics of the intermediate and heavy fraction organics did not change significantly over time, while those of the WEOM fraction did. Bacterial and fungal community compositions changed significantly over the course of the incubation, and these changes were correlated with changes in WEOM composition (Heckman et al, 2012). This result is important in the context of evaluating the influence of microbial community composition on organic matter degradation rates and characteristics of stabilized organic matter.…”

Section: Comparison Of Mineral and Organic Components Of Intermediatementioning

confidence: 87%

“…The chemical composition of soluble organic matter and metals generated in these incubations, and the ensuing changes in microbial community composition, have been published elsewhere (Heckman et al, , 2012. Results of those studies that aid in interpretation of the solid phase compositional changes discussed herein are summarized when relevant in the discussion section.…”

Section: Experimental Designmentioning

confidence: 99%

“…The 15 N depletion in the heavy fraction in comparison to the intermediate fraction may be the result of nitrite and nitrate sorption to gibbsite surfaces (Mariotti et al, 1981), since gibbsite surfaces most likely carried a positive charge throughout the incubation (Karamalidis and Dzombak, 2010) and microbial communities were likely not nitrogen limited (Heckman et al, 2012).…”

Section: Statisticsmentioning

confidence: 99%

See 2 more Smart Citations

Sorptive fractionation of organic matter and formation of organo-hydroxy-aluminum complexes during litter biodegradation in the presence of gibbsite

Heckman

Grandy

Gao

et al. 2013

Geochimica et Cosmochimica Acta

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Section: Comparison Of Mineral and Organic Components Of Intermediatementioning

confidence: 87%

Section: Experimental Designmentioning

confidence: 99%

Section: Statisticsmentioning

confidence: 99%

See 1 more Smart Citation

Sorptive fractionation of organic matter and formation of organo-hydroxy-aluminum complexes during litter biodegradation in the presence of gibbsite

Heckman

Grandy

Gao

et al. 2013

Geochimica et Cosmochimica Acta

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“…It is unclear to which extent colonization involves different types of microbial communities and consecutive replacement. Some studies have either investigated adhesion of single bacterial species to individual minerals in laboratory cultures (Chenu and Stotzky, 2002;Hong et al, 2012;Huang et al, 2015;Ahmed et al, 2017) or bacterial colonization of artificial soils incubated in laboratory microcosms (Heckman et al, 2012;Pronk et al, 2012;Ding et al, 2013;Babin et al, 2014;Hemkemeyer et al, 2014;Ditterich et al, 2016). The latter demonstrated that microbial communities changed over relatively short time spans of 6 to 18 months (Heckman et al, 2012;Hemkemeyer et al, 2014;Ditterich et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Bacterial colonization of minerals in grassland soils is selective and highly dynamic

Vieira

Sikorski

Gebala

et al. 2019

Environmental Microbiology

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Summary Bacteria colonize reactive minerals in soils where they contribute to mineral weathering and transformation. So far, the specificity, patterns and dynamics of mineral colonization have rarely been assessed under natural conditions. High throughput Illumina sequencing was employed to investigate the bacterial communities assembling on illite and goethite during exposure to natural grassland soils. Two different types of organic carbon sources, simple carbon compounds representing root exudates and detritus of two dominant grassland plant species were applied, and their effects on the temporal dynamics of bacterial communities were investigated. The observed temporal patterns suggest that the surfaces of de novo exposed minerals in soils drive the establishment of bacterial communities and override the effect of the type of carbon sources and of other environmental properties. Mineral colonization was selective and specific bacterial sequence variants exhibited distinct colonization patterns, among which early, intermittent, and late colonizers could be distinguished. Based on our results, soil minerals are not only colonized by specific bacterial communities but enable a succession of different bacterial communities. Our results thereby expand the concept of the mineralosphere and provide novel insights into mechanisms of community assembly in the soil ecosystem.

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“…Potentially toxic trace metalloids and metals such as arsenic, lead, and cadmium sorb to the surface of iron(III) (oxyhydr)oxides and are removed from the aqueous phase (1)(2)(3)(4)(5). Also, the availability of nutrients such as phosphate can be limited by adsorption (6,7). During reductive dissolution, substances adsorbed to the surface of iron(III) (oxyhydr)oxides are released.…”

mentioning

confidence: 99%

Sulfur Species as Redox Partners and Electron Shuttles for Ferrihydrite Reduction by Sulfurospirillum deleyianum

Lohmayer

Kappler

Lösekann-Behrens

et al. 2014

Appl Environ Microbiol

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b Iron(III) (oxyhydr)oxides can represent the dominant microbial electron acceptors under anoxic conditions in many aquatic environments, which makes understanding the mechanisms and processes regulating their dissolution and transformation particularly important. In a previous laboratory-based study, it has been shown that 0.05 mM thiosulfate can reduce 6 mM ferrihydrite indirectly via enzymatic reduction of thiosulfate to sulfide by the sulfur-reducing bacterium Sulfurospirillum deleyianum, followed by abiotic reduction of ferrihydrite coupled to reoxidation of sulfide. Thiosulfate, elemental sulfur, and polysulfides were proposed as reoxidized sulfur species functioning as electron shuttles. However, the exact electron transfer pathway remained unknown. Here, we present a detailed analysis of the sulfur species involved. Apart from thiosulfate, substoichiometric amounts of sulfite, tetrathionate, sulfide, or polysulfides also initiated ferrihydrite reduction. The portion of thiosulfate produced during abiotic ferrihydrite-dependent reoxidation of sulfide was about 10% of the total sulfur at maximum. The main abiotic oxidation product was elemental sulfur attached to the iron mineral surface, which indicates that direct contact between microorganisms and ferrihydrite is necessary to maintain the iron reduction process. Polysulfides were not detected in the liquid phase. Minor amounts were found associated either with microorganisms or the mineral phase. The abiotic oxidation of sulfide in the reaction with ferrihydrite was identified as rate determining. Cysteine, added as a sulfur source and a reducing agent, also led to abiotic ferrihydrite reduction and therefore should be eliminated when sulfur redox reactions are investigated. Overall, we could demonstrate the large impact of intermediate sulfur species on biogeochemical iron transformations.

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The influence of goethite and gibbsite on soluble nutrient dynamics and microbial community composition

Cited by 27 publications

References 73 publications

Sorptive fractionation of organic matter and formation of organo-hydroxy-aluminum complexes during litter biodegradation in the presence of gibbsite

Sorptive fractionation of organic matter and formation of organo-hydroxy-aluminum complexes during litter biodegradation in the presence of gibbsite

Bacterial colonization of minerals in grassland soils is selective and highly dynamic

Sulfur Species as Redox Partners and Electron Shuttles for Ferrihydrite Reduction by Sulfurospirillum deleyianum

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