Volatile methanol and acetone additions increase labile soil carbon and inhibit nitrification

McBride, Steven G.; Osburn, Ernest D.; Barrett, John E.

doi:10.1007/s10533-019-00595-0

Cited by 17 publications

(10 citation statements)

References 76 publications

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“…Like LMW-DOC, VOCs, including methanol and monoterpenes, function as microbial C substrates (Madyastha et al, 1977;Radajewski et al, 2002. ), drive microbial activity (Asensio et al, 2012;McBride et al, 2019), alter N transformations (Paavolainen et al, 1998;McBride et al, 2019), and alter microbial community composition (McBride et al, 2020). VOCs can enter the soil through a variety of mechanisms including root emission, organic matter decomposition, and soil-atmosphere exchange, (Asensio et al, 2007;Leff and Fierer, 2008;Wenke et al, 2010;Peñuelas et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Volatile and Dissolved Organic Carbon Sources Have Distinct Effects on Microbial Activity, Nitrogen Content, and Bacterial Communities in Soil

et al. 2022

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Variation in microbial use of soil carbon compounds is a major driver of biogeochemical processes and microbial community composition. Available carbon substrates in soil include both low molecular weight dissolved organic carbon (LMW-DOC), and volatile organic compounds (VOCs). To compare the effects of LMW-DOC and VOCs on soil chemistry and microbial communities under different moisture regimes, we performed a microcosm experiment with ve levels of soil water content (ranging from 25-70% waterholding capacity) and ve levels of carbon amendment: a no carbon control, two dissolved compounds (glucose and oxalate), and two volatile compounds (methanol and α-pinene). Microbial activity was measured throughout as soil respiration; at the end of the experiment, we measured extractable soil organic carbon and total extractable nitrogen and characterized prokaryotic communities using amplicon sequencing. All C amendments increased microbial activity, and all except oxalate decreased total extractable nitrogen. Likewise, individual phyla responded to speci c C amendments -e.g., Proteobacteria increased under addition of glucose, and both VOCs. Further, we observed an interaction between moisture and C amendment, where both VOC treatments had higher microbial activity than LMW-DOC treatments and controls at low moisture. Across moisture and C treatments, we identi ed that Chloro exi, Nitrospirae, Proteobacteria, and Verrucomicrobia were strong predictors of microbial activity, while Actinobacteria, Bacteroidetes, and Thaumarcheota strongly predicted soil extractable nitrogen.These results indicate that the type of labile C source available to soil prokaryotes can in uence both microbial diversity and ecosystem function and that VOCs may drive microbial functions and composition under low moisture conditions.

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Section: Introductionmentioning

confidence: 99%

Volatile and Dissolved Organic Carbon Sources Have Distinct Effects on Microbial Activity, Nitrogen Content, and Bacterial Communities in Soil

et al. 2022

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“…Indeed, soils exposed to litter VOCs absorbed 80% of the VOCs emitted from decomposing litter (Ramirez et al 2010), and respiration in soils exposed to VOCs increases significantly (Asensio et al 2012). Beyond C dynamics, methanol and acetone—common litter‐derived VOCs—have been shown to affect nitrogen (N) transformations (McBride et al 2019), as have monoterpenes (Paavolainen et al 1998, Smolander et al 2006). Likewise, monoterpenes may also inhibit soil enzyme activity (Adamczyk et al 2015).…”

Section: Introductionmentioning

confidence: 99%

“…The mechanisms of these VOC effects are not yet clear. However, it could be driven by VOC‐induced changes to the microbial community through limiting or promoting the growth of specific microbial taxa, for example, methylotrophic bacteria (Wheatley 2002, Gray et al 2015), increasing microbial activity (McBride et al 2019), or inhibiting soil microbes (Asensio et al 2012).…”

Section: Introductionmentioning

confidence: 99%

“…We expected that if VOCs emitted during decomposition represent a significant C source to soils, then we would detect litter‐derived C in multiple soil pools, and this may be dependent on litter type. Additionally, we expected that VOCs emitted during decomposition would lead to change in soil microbial communities, because VOCs may act as a resource for some microbes while inhibiting others (Ramirez et al 2010, McBride et al 2019). By using 13 C‐labeled leaf litter, we tracked litter‐derived VOC‐C into several soil C pools throughout a 99‐d incubation period to determine if and to what extent VOCs contribute to soil C pools and the composition of soil microbial communities.…”

Section: Introductionmentioning

confidence: 99%

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Volatile organic compounds from leaf litter decomposition alter soil microbial communities and carbon dynamics

McBride

Choudoir

Fierer

2020

Ecology

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Investigations into the transfer of carbon from plant litter to underlying soil horizons have primarily focused on the leaching of soluble carbon from litter belowground or the mixing of litter directly into soil. However, previous work has largely ignored the role of volatile organic compounds (VOCs) released during litter decomposition. Unlike most leaf carbon, these litter-derived VOCs are able to diffuse directly into the soil matrix. Here, we used a 99-d microcosm experiment to track VOCs produced during microbial decomposition of 13 Clabeled leaf litter into soil carbon fractions where the decomposing litters were only sharing headspace with the soil samples, thus preventing direct contact and aqueous movement of litter carbon. We also determined the effects of these litter-derived VOCs on soil microbial community structure. We demonstrated that the litter VOCs contributed to all measured soil carbon pools. Specifically, VOC-derived carbon accounted for 2.0, 0.61, 0.18, and 0.08% of carbon in the microbial biomass, dissolved organic matter, mineral-associated organic matter, and particulate organic matter pools, respectively. We also show that litter-derived VOCs can affect soil bacterial and fungal community diversity and composition. These findings highlight the importance of an underappreciated pathway where VOCs alter soil microbial communities and carbon dynamics.

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“…As nitrite oxidation is affected by low dissolved oxygen levels to a larger extent than ammonium oxidation (Soliman and Eldyasti, 2018), nitrite would have accumulated in the media if oxygen had been limiting in our batches. Second, methanol can bind to the ammonium mono-oxygenase, one of the enzymes involved in nitrification, and hence inhibit it (McBride et al, 2019). Inhibition of nitrification by methanol has been reported in literature (Jönsson et al, 2001;Martin and Richard, 1982;Suzuki et al, 1976;Voysey and Wood, 1987), although most studies report inhibitory effects at levels at least 10 times higher than the initial concentration used in this experiment (8.5 mg/L).…”

Section: Melamine Biodegradation In Oxic and Anoxic Conditionsmentioning

confidence: 78%

Micropollutants removal with activated carbon : Adsorption and regeneration by biodegradation

Piai¹

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Hydrophilic organic micropollutants are commonly detected in source water used for drinking water production. Effective technologies to remove these micropollutants from water include adsorption onto granular activated carbon in fixed-bed filters. The ratedetermining step in adsorption using activated carbon is usually the adsorbate diffusion inside the porous adsorbent. The presence of mesopores can facilitate diffusion, resulting in higher adsorption rates. We used two different types of granular activated carbon, with and without mesopores, to study the adsorption rate of hydrophilic micropollutants. Furthermore, equilibrium studies were performed to determine the affinity of the selected micropollutants for the activated carbons. A pore diffusion model was applied to the kinetic data to obtain pore diffusion coefficients. We observed that the adsorption rate is influenced by the molecular size of the micropollutant as well as the granular activated carbon pore size.

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Volatile methanol and acetone additions increase labile soil carbon and inhibit nitrification

Cited by 17 publications

References 76 publications

Volatile and Dissolved Organic Carbon Sources Have Distinct Effects on Microbial Activity, Nitrogen Content, and Bacterial Communities in Soil

Volatile and Dissolved Organic Carbon Sources Have Distinct Effects on Microbial Activity, Nitrogen Content, and Bacterial Communities in Soil

Volatile organic compounds from leaf litter decomposition alter soil microbial communities and carbon dynamics

Micropollutants removal with activated carbon : Adsorption and regeneration by biodegradation

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