Responses of mixed methanotrophic consortia to variable Cu 2+ /Fe 2+ ratios

Chidambarampadmavathy, Karthigeyan; Karthikeyan, Obulisamy Parthiba; Huerlimann, Roger; Maes, Grégory E.; Heimann, Kirsten

doi:10.1016/j.jenvman.2017.03.063

Cited by 7 publications

(5 citation statements)

References 34 publications

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“…Unfortunately, we were not able to investigate these effects at the community level. Other studies have shown that experimental modifications (on Cu and Fe content) do result in changes of the methanotrophic community (Chidambarampadmavathy et al 2017). Salinity is known to be an important factor in shaping the native bacterial population.…”

Section: Response Of Marine Mob Communities To Decreasing Salinitymentioning

confidence: 99%

Effect of salinity on microbial methane oxidation in freshwater and marine environments

Osudar¹,

Klings²,

Wagner³

et al. 2017

Aquat. Microb. Ecol.

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Salinity is an important environmental control of aerobic methane oxidation, which reduces the emission of the potent greenhouse gas methane into the atmosphere. The effect of salinity on methane oxidation is especially severe in river estuaries and adjacent coastal waters, which are important sources of methane emission and, at the same time, are usually characterized by pronounced salinity gradients. Using methane oxidation rates determined by a radiotracer technique as a measure of methanotrophic activity, we tested the effect of immediate and gradual salinity changes on pure cultures of methanotrophic bacteria, and natural freshwater (Elbe River) and natural marine (North Sea) methanotrophic populations. According to our results, Methylomonas sp. and Methylosinus trichosporium are resistant to an increase in salinity, whereas Methylovulum sp. and Methylobacter luteus are sensitive to such an increase. Natural methanotrophic populations from freshwater are more resistant to an increase in salinity than those from marine water are to a decrease in salinity. In contrast to an immediate change of salinity, gradual change (1.25 PSU d −1) can attenuate salinity stress. Experiments with the natural populations revealed different reactions to changes in salinity; thus, we assume that the initial composition of the methanotrophic population, i.e. the ratio of sensitive versus resistant strains, also governs the community response to salinity stress.

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Section: Response Of Marine Mob Communities To Decreasing Salinitymentioning

confidence: 99%

Effect of salinity on microbial methane oxidation in freshwater and marine environments

Osudar¹,

Klings²,

Wagner³

et al. 2017

Aquat. Microb. Ecol.

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“…The used biogas consisted of 61.1% CH4, 38.9% CO2 and 913 ppm H2S. Besides CH4, some methanotrophs can tolerate and in some cases assimilate CO2 for biomass generation (Chidambarampadmavathy et al, 2017). Contrary to the positive impact of the gasses in biogas, H2S might exert adverse effect on growth of methylotrophs.…”

Section: Effect Of H2s On Mixed Methanotrophic Culture Performancementioning

confidence: 99%

Methane oxidising bacteria to upcycle effluent streams from anaerobic digestion of municipal biowaste

Tsapekos

Khoshnevisan

Zhu

et al. 2019

Journal of Environmental Management

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“…Such methane oxidation zones migrate within the water column as stratification progresses (Carini et al, 2005). Competitiveness under specific oxygen, methane, copper and iron concentrations can be a factor leading to MOB niche differentiation (Knief, 2015;Chidambarampadmavathy et al, 2017;Guggenheim et al, 2019;Mayr et al, 2019;Reis et al, 2020). This is thought to be partially coupled to the composition and property of the expressed methane monooxygenase (MMO), which initiates the methane oxidation process and exists in two main forms (Sirajuddin and Rosenzweig, 2015).…”

Section: Introductionmentioning

confidence: 99%

Environmental and Microbial Interactions Shape Methane-Oxidizing Bacterial Communities in a Stratified Lake

et al. 2020

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In stratified lakes, methane-oxidizing bacteria (MOB) are strongly mitigating methane fluxes to the atmosphere by consuming methane entering the water column from the sediments. MOB communities in lakes are diverse and vertically structured, but their spatio-temporal dynamics along the water column as well as physico-chemical parameters and interactions with other bacterial species that drive the community assembly have so far not been explored in depth. Here, we present a detailed investigation of the MOB and bacterial community composition and a large set of physico-chemical parameters in a shallow, seasonally stratified, and sub-alpine lake. Four highly resolved vertical profiles were sampled in three different years and during various stages of development of the stratified water column. Non-randomly assembled MOB communities were detected in all compartments. We could identify methane and oxygen gradients and physico-chemical parameters like pH, light, available copper and iron, and total dissolved nitrogen as important drivers of the MOB community structure. In addition, MOB were well-integrated into a bacterial-environmental network. Partial redundancy analysis of the relevance network of physico-chemical variables and bacteria explained up to 84% of the MOB abundances. Spatio-temporal MOB community changes were 51% congruent with shifts in the total bacterial community and 22% of variance in MOB abundances could be explained exclusively by the bacterial community composition. Our results show that microbial interactions may play an important role in structuring the MOB community along the depth gradient of stratified lakes.

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Responses of mixed methanotrophic consortia to variable Cu 2+ /Fe 2+ ratios

Cited by 7 publications

References 34 publications

Effect of salinity on microbial methane oxidation in freshwater and marine environments

Effect of salinity on microbial methane oxidation in freshwater and marine environments

Methane oxidising bacteria to upcycle effluent streams from anaerobic digestion of municipal biowaste

Environmental and Microbial Interactions Shape Methane-Oxidizing Bacterial Communities in a Stratified Lake

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