Copper effect on the growth kinetics of Methylococcus capsulatus (bath)

Zhivotchenko, A. G.; Nikonova, E. S.; Jørgensen, M.H.

doi:10.1007/bf00157072

Cited by 9 publications

(8 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, our study shows that MOB are more sensitive to MgCl2, demonstrating that the impact of salinity depends on the ions in solution. Growth yield of methane for the control is 0.57±0.03 g-VSS g -1 -CH4, which falls within the data reported in previous studies [57][58][59][60][61]. As salt concentration increases, the methane yield decreases.…”

Section: Impact Of Draw Solutes On Methanotrophic Activity and Fo Performancesupporting

confidence: 88%

Dewatering methanotrophic enrichments intended for single cell protein production using biomimetic aquaporin forward osmosis membranes

Valverde-Pérez

Pape

Kjeldgaard

et al. 2020

Separation and Purification Technology

View full text Add to dashboard Cite

General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. Users may download and print one copy of any publication from the public portal for the purpose of private study or research.  You may not further distribute the material or use it for any profit-making activity or commercial gain  You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

show abstract

Section: Impact Of Draw Solutes On Methanotrophic Activity and Fo Performancesupporting

confidence: 88%

Dewatering methanotrophic enrichments intended for single cell protein production using biomimetic aquaporin forward osmosis membranes

Valverde-Pérez

Pape

Kjeldgaard

et al. 2020

Separation and Purification Technology

View full text Add to dashboard Cite

show abstract

“…The sea-ice bulk methane concentrations observed in this study (53-144 nmol kg −1 ) are significantly higher than in a study from the same area (Zhou et al, 2014), but fall within values reported for the Beaufort Sea (5-1260 nM, Lorenson and Kvenvolden, 1995). Methane carbon isotopic signatures (−54.4 to −63.8 ‰) are comparable to the higher end of previous studies for bulk sea ice (−52.1 to −83.4 ‰ , Lorenson and Kvenvolden, 1995) and sea-ice brine (−75 ‰ , Damm et al, 2015).…”

Section: Methane Concentration and Stable Isotope Ratios In Seawater contrasting

confidence: 87%

“…They attributed the high methane concentrations in the fast ice to inclusion of sediment-sourced methane during the initial freeze-up over the shallow shelf at < 10 m water depth (Lorenson et al, 2016). Methane concentrations in IC2, which are close to water column concentrations reported in previous studies for our study region (Lecher et al, 2016;Zhou et al, 2014), suggest the same process for our ice cores. Further, in our study, the lower methane concentrations together with more positive (heavier) isotopic signature in seawater compared to ice, might indicate that the microbial community in the water column is oxidizing more methane during the ice-covered period than in the freeze-up period.…”

Section: Methane Concentration and Stable Isotope Ratios In Seawater supporting

confidence: 86%

“…The concentration at site EL (52.90 nmol L −1 , n = 1, 7 April 2016) was in the range of a study by Lecher et al (2016) in EL under ice-free conditions (3.3-124.0 nmol L −1 ). At site IMB, concentrations were slightly lower (9.5-25.2 nmol L −1 : n = 5, 15 April 2018) than previously reported from the same area for ice-free (Lecher et al, 2016;mean: 40.6 nmol L −1 ), and ice-covered conditions (Zhou et al, 2014;March/April: 37.5 ± 6 nmol L −1 ). Shallower depths at IMB exhibit lower methane concentrations (Fig.…”

Section: Methane Concentration and Stable Isotope Ratios In Seawater contrasting

confidence: 55%

“…Under ice-free conditions, methane concentrations are frequently found in the range of 15 to 30 nmol L −1 or up to 7 times supersaturated with regard to atmospheric equilibrium, while winter concentrations are often 10 to 100 times higher. Maximal concentrations of 5000 nmol L −1 , or oversaturation of 1600 times, have been reported from the Siberian Shelf (Lorenson et al, 2016;Shakhova et al, 2010;Zhou et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Response to comments of Referee #2

Uhlig¹

2018

Preprint

View full text Add to dashboard Cite

Marine microbial communities can consume dissolved methane before it can escape to the atmosphere and contribute to global warming. Seawater over the shallow Arctic shelf is characterized by excess methane compared to atmospheric equilibrium. This methane originates in sediment, permafrost, and hydrate. Particularly high concentrations are found beneath sea ice. We studied the structure and methane oxidation potential of the microbial communities from seawater collected close to Utqiagvik, Alaska, in April 2016. The in situ methane concentrations were 16.3 ± 7.2 nmol L −1 , approximately 4.8 times oversaturated relative to atmospheric equilibrium. The group of methaneoxidizing bacteria (MOB) in the natural seawater and incubated seawater was > 97 % dominated by Methylococcales (γ -Proteobacteria). Incubations of seawater under a range of methane concentrations led to loss of diversity in the bacterial community. The abundance of MOB was low with maximal fractions of 2.5 % at 200 times elevated methane concentration, while sequence reads of non-MOB methylotrophs were 4 times more abundant than MOB in most incubations. The abundances of MOB as well as non-MOB methylotroph sequences correlated tightly with the rate constant (k ox ) for methane oxidation, indicating that non-MOB methylotrophs might be coupled to MOB and involved in community methane oxidation. In sea ice, where methane concentrations of 82 ± 35.8 nmol kg −1 were found, Methylobacterium (α-Proteobacteria) was the dominant MOB with a relative abundance of 80 %. Total MOB abundances were very low in sea ice, with maximal fractions found at the icesnow interface (0.1 %), while non-MOB methylotrophs were present in abundances similar to natural seawater commu-nities. The dissimilarities in MOB taxa, methane concentrations, and stable isotope ratios between the sea ice and water column point toward different methane dynamics in the two environments.

show abstract

Methylococcus

Bowman¹

2015

Bergey's Manual of Systematics of Archaea and Bacteria

View full text Add to dashboard Cite

Me.thy.lo.coc' cus . Fr. n. méthyle the methyl radical; Gr. n. coccus a grain, berry; M.L. n. Methylococcus methyl coccus. Proteobacteria / Gammaproteobacteria / Methylococcales / Methylococcaceae / Methylococcus Cells appear as cocci or rods , 0.8–1.5 × 1.0–1.5 µm. Usually occur singly or in pairs. Form a polysaccharide‐containing cyst‐like resting stage that is desiccation sensitive. Poly‐β‐hydroxybutyrate granules present. Gram negative . If motile, cells are propelled by single polar flagellum. Catalase and oxidase positive. Strictly aerobic respiratory metabolism with oxygen as the electron acceptor. Obligate utilizers of methane and methanol for carbon and energy . Contain a partially functional Benson–Calvin cycle (phosphoribulokinase and ribulose‐1,5‐diphosphate carboxylase activity present); however, incorporation of CO 2 for cellular carbon occurs only in the presence of methane. Fix atmospheric nitrogen via an oxygen‐sensitive nitrogenase. Thermotolerant or moderately thermophilic with optimal growth between 40–60°C. Major fatty acids include C 16:0 and C 16:1 ω7c . 18‐Methyleneubiquinone‐8 (MQ‐8) is the predominant lipoquinone. Isolated from sediments of freshwater lakes and rivers, wetland muds, activated sludge, and wastewater. Belongs to the Gammaproteobacteria as part of the Order Methylococcales , Family Methylococcaceae . The mol % G + C of the DNA is : 59–65 ( T m ). Type species : Methylococcus capsulatus Foster and Davis 1966, 1929.

show abstract

Copper effect on the growth kinetics of Methylococcus capsulatus (bath)

Cited by 9 publications

References 9 publications

Dewatering methanotrophic enrichments intended for single cell protein production using biomimetic aquaporin forward osmosis membranes

Dewatering methanotrophic enrichments intended for single cell protein production using biomimetic aquaporin forward osmosis membranes

Response to comments of Referee #2

Methylococcus

Contact Info

Product

Resources

About