Recurrence and Frequency of Disturbance have Cumulative Effect on Methanotrophic Activity, Abundance, and Community Structure

Frontiers in Microbiology
Adrian HoPaul L E Bodelier

Abstract

Alternate prolonged drought and heavy rainfall is predicted to intensify with global warming. Desiccation-rewetting events alter the soil quality and nutrient concentrations which drive microbial-mediated processes, including methane oxidation, a key biogeochemical process catalyzed by methanotrophic bacteria. Although aerobic methanotrophs showed remarkable resilience to a suite of physical disturbances induced as a single event, their resilience to recurring disturbances is less known. Here, using a rice field soil in a microcosm study, we determined whether recurrence and frequency of desiccation-rewetting impose an accumulating effect on the methanotrophic activity. The response of key aerobic methanotroph subgroups (type Ia, Ib, and II) were monitored using qPCR assays, and was supported by a t-RFLP analysis. The methanotrophic activity was resilient to recurring desiccation-rewetting, but increasing the frequency of the disturbance by twofold significantly decreased methane uptake rate. Both the qPCR and t-RFLP analyses were congruent, showing the dominance of type Ia/Ib methanotrophs prior to disturbance, and after disturbance, the recovering community was predominantly comprised of type Ia (Methylobacter) methanotrophs....Continue Reading

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Citations

Oct 11, 2017·Frontiers in Microbiology·Stephanie D JurburgJoana F Salles
Aug 16, 2018·Frontiers in Microbiology·Henri van KruistumAnnelies J Veraart
Jun 26, 2020·Frontiers in Microbiology·D'Arcy R Meyer-DombardJudy Malas
Aug 29, 2020·FEMS Microbiology Ecology·Adrian HoMarcus A Horn
Apr 2, 2021·Microbiology and Molecular Biology Reviews : MMBR·Laurent PhilippotSilke Langenheder

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Methods Mentioned

BETA
PCR
electrophoresis

Software Mentioned

vegan
GeneScan
SigmaPlot
R
gplots

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