Succession of soil microbial communities and enzyme activities in artificial soils

Ditterich, Franziska; Poll, Christian; Pronk, Geertje Johanna; Heister, Katja; Chandran, Abhirosh; Rennert, Thilo; Kögel‐Knabner, Ingrid; Kandeler, Ellen

doi:10.1016/j.pedobi.2016.03.002

Cited by 21 publications

(18 citation statements)

References 66 publications

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“…They allow for insight into fundamental questions about soil aggregate development38, organic matter turnover39 and mineralogical influences on microbial communities and decomposition404142. Here we use model soils for real-time monitoring of microbial-SOM formation and demonstrate that microbial processing of simple C substrates produced an abundance of stable, chemically diverse SOM dominated by microbial proteins and lipids, comparable to natural soils.…”

Section: Discussionmentioning

confidence: 94%

Direct evidence for microbial-derived soil organic matter formation and its ecophysiological controls

2016

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Soil organic matter (SOM) and the carbon and nutrients therein drive fundamental submicron- to global-scale biogeochemical processes and influence carbon-climate feedbacks. Consensus is emerging that microbial materials are an important constituent of stable SOM, and new conceptual and quantitative SOM models are rapidly incorporating this view. However, direct evidence demonstrating that microbial residues account for the chemistry, stability and abundance of SOM is still lacking. Further, emerging models emphasize the stabilization of microbial-derived SOM by abiotic mechanisms, while the effects of microbial physiology on microbial residue production remain unclear. Here we provide the first direct evidence that soil microbes produce chemically diverse, stable SOM. We show that SOM accumulation is driven by distinct microbial communities more so than clay mineralogy, where microbial-derived SOM accumulation is greatest in soils with higher fungal abundances and more efficient microbial biomass production.

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Section: Discussionmentioning

confidence: 94%

Direct evidence for microbial-derived soil organic matter formation and its ecophysiological controls

2016

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“…On fresh mineral surfaces in soils, the first colonizers are thought to be fast‐growing bacteria (Ditterich et al ., ; Pronk et al ., ). This concurs with our findings, since most of the bacteria, which responded quickly to the presence of minerals (group B), were members of the families Micrococcaceae and Oxalobacteraceae , known for their copiotrophic behaviour.…”

Section: Discussionmentioning

confidence: 97%

“…Also, the presence of the clay minerals illite, montmorillionite and the iron oxyhydroxide goethite in (mostly artificial) soils has previously been shown to change the relative abundances of different bacterial phyla or classes. These were attributed to specific physicochemical properties of the mineral surfaces and differences in nutrient availability (Heckman et al, 2012;Ding et al, 2013;Ditterich et al, 2016;Whitman et al, 2018). Different bacterial taxa show different capabilities of binding to minerals (Frey et al, 2010), which are due to distinct mineral surface charge (Roberts, 2004), roughness (Huang et al, 2015) and chemical composition (Gleeson et al, 2006).…”

Section: Assembly Of Soil Bacterial Communities On Goethite and Illitmentioning

confidence: 99%

“…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%

“…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). It is not known whether differences in associated bacterial communities between different minerals observed over a few months persist over longer time periods (Whitman et al, 2018) and, vice versa, whether differences in colonization patterns observed after several years represent the initial colonizers (Ahmed et al, 2017;Colin et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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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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Interaction of minerals, organic matter, and microorganisms during biogeochemical interface formation as shown by a series of artificial soil experiments

et al. 2016

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Succession of soil microbial communities and enzyme activities in artificial soils

Cited by 21 publications

References 66 publications

Direct evidence for microbial-derived soil organic matter formation and its ecophysiological controls

Direct evidence for microbial-derived soil organic matter formation and its ecophysiological controls

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

Interaction of minerals, organic matter, and microorganisms during biogeochemical interface formation as shown by a series of artificial soil experiments

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