Methylobacter accounts for strong aerobic methane oxidation in the Yellow River Delta with characteristics of a methane sink during the dry season

Hao, Qing-Ju; Liu, Fanghua; Zhang, Yuechao; Wang, Oumei; Xiao, Leilei

doi:10.1016/j.scitotenv.2019.135383

Cited by 34 publications

(11 citation statements)

References 47 publications

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“…Compared with natural grassland, the range of disturbance to the soil environment caused by human activities, such as irrigation, fertilization, land preparation, and vegetation changes, may have caused significant changes in the methanotrophic community of pasture (Anna et al, 2018). The difference in the proportion of type I and type II methanotrophs in pasture may be due to the stronger salt tolerance of type I methanotrophs compared with type II methanotrophs (Hao et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

“…Tveit et al (2019) reported that M. gorgona MG08 has typical facultative physiological and metabolic characteristics and is capable of oxidizing not only atmospheric CH 4 but also elevated CH 4 . Other studies have shown that some specific conventional methanotrophs in paddy soils have the potential to oxidize low‐concentration CH 4 by oxidizing elevated CH 4 initially (Cai et al, 2016; Hao et al, 2019). Similar studies have not been reported in grassland soils.…”

Section: Introductionmentioning

confidence: 99%

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Elevated and atmospheric‐level methane consumption by soil methanotrophs of three grasslands in China

et al. 2023

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Background Methane (CH4) oxidation driven by soil aerobic methanotrophs demonstrates the capacity of grassland as a CH4 sink. Methods In this study, we compared the oxidation characteristics of atmospheric‐level and elevated concentration (10%) CH4 in a typical grassland (steppe) on the Loess Plateau, an alpine meadow (meadow) on the Qinghai‐Tibet Plateau, and an inland arid‐area artificial grassland (pasture) in northwest China and investigated the communities of active methanotrophs and their contribution to CH4 oxidation using DNA‐based stable‐isotope probing and Illumina Miseq sequencing. Results The results showed that the oxidation of atmospheric CH4 only occurred in steppe and meadow soils where the USCγ group of methanotrophs was numerically dominant in the methanotroph community. Pasture soils, with their very low relative abundance of USCγ, did not show atmospheric CH4 oxidation. However, a DNA‐stable isotope probing experiment with 10% CH4 indicated that conventional CH4 oxidizers (Methylocaldum and Methylocystis) rather than USCγ communities assimilated significant amounts of 13CH4 for growth. Conclusions The CH4 oxidation mechanisms in the three experimental grassland soils varied significantly. The USCγ group may be obligate oligotrophic microorganisms or their growth requires specific unknown conditions.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Elevated and atmospheric‐level methane consumption by soil methanotrophs of three grasslands in China

et al. 2023

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“…Soil used in this experiment was collected from the Dahuchi Conservation Station of Poyang Lake, the National Nature Reserve in Jiangxi (PY: 29 [53], and Minjiang Estuary Wetland (HS: 26 • 2 0 N, 119 • 37 0 E) [54]. The sedimentary material land of Poyang Lake is mainly divided into sandy soil and sandy loam, and the soil as a whole is alkaline [47].…”

Section: Samples Collectingmentioning

confidence: 99%

Production Potential of Greenhouse Gases Affected by Microplastics at Freshwater and Saltwater Ecosystems

Zhang

Zhou

et al. 2022

Atmosphere

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Currently, microplastic pollution poses a great threat to diverse ecosystems. Microplastics can potentially change soil characteristics and impact soil microorganisms, and then affect the production of CO2, CH4 and other greenhouse gases. However, experimental study on different ecological soils is lacking. Herein, we experimentally analyzed the CO2 and CH4 production potential affected by four types of microplastics in freshwater (Poyang Lake in Jiangxi province, paddy soil in Hunan province) and saltwater (Salt marsh in Shandong province, mangrove soil in Fujian province) ecosystems. Microplastics promoted CO2 production, of which polyethylene terephthalate (PET) had the greatest impact. In our study, the microplastics that had the greatest impact on CH4 concentration emissions were high-density polyethylene (1276 umol·g−1·L−1), followed by polyvinyl chloride (384 umol·g−1·L−1), polyethylene terephthalate (198 umol·g−1·L−1), and polyamide (134 umol·g−1·L−1). In addition, the largest impact on CO2 concentration emissions was displayed by polyethylene terephthalate (2253 umol·g−1·L−1), followed by polyvinyl chloride (2194 umol·g−1·L−1), polyamide (2006 umol·g−1·L−1), and high-density polyethylene (1522 umol·g−1·L−1). However, the analysis results based on one-way ANOVA showed that CO2 emission was most significantly affected by soil properties rather than microplastics types. In comparison, the influencing factor on CH4 production changed from soil types to the interaction between soil types and microplastics, and finally to the microplastics with the increase in incubation time. Further, by comparing CO2 and CH4 production and Global Warming Equivalent (GWE) affected by microplastics, freshwater ecosystems were more sensitive than saltwater. For all the soil types used in this study, high-density polyethylene had the greatest impact on CH4 production potential. In conclusion, our study provided basic data for further understanding the effects of microplastics on soil greenhouse gas emissions from different sources.

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“…Typically, Methylobacter species are found in freshwater oxic sediments, terrestrial habitats and marine ecosystems, where they account for a large fraction of aerobic methanotrophy (Hao et al, 2020;Khatri et al 2019;Smith et al 2018). Thermoacidophilic Methylobacter species have, so far, not been isolated.…”

Section: Ecological Rolementioning

confidence: 99%

Draft genome of a novel methanotrophic Methylobacter sp. from the volcanic soils of Pantelleria Island

Hogendoorn

Picone

Hout

et al. 2021

Antonie van Leeuwenhoek

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The genus Methylobacter is considered an important and often dominant group of aerobic methane-oxidizing bacteria in many oxic ecosystems, where members of this genus contribute to the reduction of CH4 emissions. Metagenomic studies of the upper oxic layers of geothermal soils of the Favara Grande, Pantelleria, Italy, revealed the presence of various methane-oxidizing bacteria, and resulted in a near complete metagenome assembled genome (MAG) of an aerobic methanotroph, which was classified as a Methylobacter species. In this study, the Methylobacter sp. B2 MAG was used to investigate its metabolic potential and phylogenetic affiliation. The MAG has a size of 4,086,539 bp, consists of 134 contigs and 3955 genes were found, of which 3902 were protein coding genes. All genes for CH4 oxidation to CO2 were detected, including pmoCAB encoding particulate methane monooxygenase (pMMO) and xoxF encoding a methanol dehydrogenase. No gene encoding a formaldehyde dehydrogenase was present and the formaldehyde to formate conversion follows the tetrahydromethanopterin (H4MPT) pathway. “Ca. Methylobacter favarea” B2 uses the Ribulose-Mono-Phosphate (RuMP) pathway for carbon fixation. Analysis of the MAG indicates that Na+/H+ antiporters and the urease system might be important in the maintenance of pH homeostasis of this strain to cope with acidic conditions. So far, thermoacidophilic Methylobacter species have not been isolated, however this study indicates that members of the genus Methylobacter can be found in distinct ecosystems and their presence is not restricted to freshwater or marine sediments.

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Methylobacter accounts for strong aerobic methane oxidation in the Yellow River Delta with characteristics of a methane sink during the dry season

Cited by 34 publications

References 47 publications

Elevated and atmospheric‐level methane consumption by soil methanotrophs of three grasslands in China

Elevated and atmospheric‐level methane consumption by soil methanotrophs of three grasslands in China

Production Potential of Greenhouse Gases Affected by Microplastics at Freshwater and Saltwater Ecosystems

Draft genome of a novel methanotrophic Methylobacter sp. from the volcanic soils of Pantelleria Island

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