Effect of CH4 concentrations and soil conditions on the induction of CH4 oxidation activity

Bender, Martin; Conrad, Ralf

doi:10.1016/0038-0717(95)00104-m

Cited by 262 publications

(189 citation statements)

References 34 publications

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“…Furthermore, methanotrophy sometimes does not resume until after an "induction period" following the reintroduction of O 2 . Induction periods of 0 to 20 d have been observed in soils and in Arctic lakes (Bender and Conrad, 1995;Dunfield et al, 1999;Martinez-Cruz et al, 2014).…”

Section: Water Column Dissolved Gasesmentioning

confidence: 99%

Modeling the impediment of methane ebullition bubbles by seasonal lake ice

et al. 2014

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Abstract. Microbial methane (CH 4 ) ebullition (bubbling) from anoxic lake sediments comprises a globally significant flux to the atmosphere, but ebullition bubbles in temperate and polar lakes can be trapped by winter ice cover and later released during spring thaw. This "ice-bubble storage" (IBS) constitutes a novel mode of CH 4 emission. Before bubbles are encapsulated by downward-growing ice, some of their CH 4 dissolves into the lake water, where it may be subject to oxidation. We present field characterization and a model of the annual CH 4 cycle in Goldstream Lake, a thermokarst (thaw) lake in interior Alaska. We find that summertime ebullition dominates annual CH 4 emissions to the atmosphere. Eighty percent of CH 4 in bubbles trapped by ice dissolves into the lake water column in winter, and about half of that is oxidized. The ice growth rate and the magnitude of the CH 4 ebullition flux are important controlling factors of bubble dissolution. Seven percent of annual ebullition CH 4 is trapped as IBS and later emitted as ice melts. In a future warmer climate, there will likely be less seasonal ice cover, less IBS, less CH 4 dissolution from trapped bubbles, and greater CH 4 emissions from northern lakes.

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Section: Water Column Dissolved Gasesmentioning

confidence: 99%

Modeling the impediment of methane ebullition bubbles by seasonal lake ice

et al. 2014

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“…Besides the chemical NPK, the addition of recycled crop residues was suggested to be vital to methanogenic archaeal and the methanogenesis in paddy soils (Conrad and Klose 2006). It is wellknown that the soil CH 4 oxidation rate can be enhanced by higher CH 4 concentrations, thus promoting the activity, growth, and eventually changing the community structure of methanotrophs (Bender and Conrad 1995). In summary, based on the DGGE profile, it was revealed that long-term application of fertilizers could change the soil methanotrophic community structure.…”

Section: Effects Of Fertilizer Applications On Soil Methanotrophic Comentioning

confidence: 99%

Abundance and community composition of methanotrophs in a Chinese paddy soil under long-term fertilization practices

et al. 2008

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Background, aim, and scope As the second most important greenhouse gas, methane (CH 4 ) is produced from many sources such as paddy fields. Methane-oxidizing bacteria (methanotrophs) consume CH 4 in paddy soil and, therefore, reduce CH 4 emission to the atmosphere. In order to estimate the contribution of paddy fields as a source of CH 4 , it is important to monitor the effects of fertilizer applications on the shifts of soil methanotrophs, which are targets in strategies to combat global climate change. In this study, real-time polymerase chain reaction (PCR) and denaturing gradient gel electrophoresis (DGGE) based on 16S rRNA and pmoA genes, respectively, were used to analyze the soil methanotrophic abundance and community diversity under four fertilization treatments: urea (N), urea and potassium chloride (NK), urea, superphosphate, and potassium chloride (NPK), and urea, superphosphate, potassium chloride, and crop residues (NPK+C), compared to an untreated control (CON). The objective of this study was to examine whether soil methanotrophs responded to the long-term, different fertilizer regimes by using a combination of quantitative and qualitative molecular approaches. Materials and methods Soil samples were collected from the Taoyuan Experimental Station of Agro-ecosystem Observation at Changde (28°55′ N, 111°26′ E), central Hunan Province of China, in July 2006. Soil DNAs were extracted from the samples, then the 16S rRNA genes were quantified by real-time PCR and the pmoA genes were amplified via general PCR followed by DGGE, cloning, sequencing, and phylogenetic analysis. The community diversity indices were assessed through the DGGE profile. Results Except for NPK, other treatments of N, NK, and NPK+C showed significantly higher copy numbers of type I methanotrophs (7.0-9.6×10 7 ) than CON (5.1×10 7 ). The copy numbers of type II methanotrophs were significantly higher in NPK+C (2.8×10 8 ) and NK (2.5×10 8 ) treatments than in CON (1.4×10 8 ). Moreover, the ratio of type II to type I methanotrophic copy numbers ranged from 1.88 to 3.32, indicating that the type II methanotrophs dominated in all treatments. Cluster analyses based on the DGGE profile showed that the methanotrophic community in NPK+C might respond more sensitively to the environmental variation. Phylogenetic analysis showed that 81% of the obtained pmoA sequences were classified as type I methanotrophs. Furthermore, the type I-affiliated sequences were related to Methylobacter, Methylomicrobium, Methylomonas, and some uncultured methanotrophic clones, and those type IIlike sequences were affiliated with Methylocystis and Methylosinus genera. Discussion There was an inhibitory effect on the methanotrophic abundance in the N and a stimulating effect in the NK and NPK+C treatments, respectively. During the ricegrowing season, the type II methanotrophs might be more profited from such a coexistence of low O 2 and high CH 4 concentration environment than the type I methanotrophs.

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“…In addition to the chemical NPK, the recycled application of crop residues and organic proposal were important to maintain methanogenic bacteria in paddy soils (Conrad and Klose, 2006). It is well-known that the soil CH 4 oxidation rate can be changed by different CH 4 concentrations, thus the growth, activities and community structure of methanotrophs were changed (Bender and Conrad, 1995). In conclusion, according to sequences and phylogenetic analysis, it was shown that soil methanotrophs community structure was changed by different fertilizer treatments.…”

Section: Effects Of Fertilizer Applications On Soil Methanotrophs DIVmentioning

confidence: 94%

Diversity and composition of methanotrophs in paddy soil as affected by different long-term fertilizer management from double-cropping paddy fields in Southern China

Tang¹,

Xu²,

Xiao³

et al. 2017

Afr. J. Microbiol. Res.

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Methane (CH 4 ) is the most important greenhouse gas, which was produced from paddy fields. The CH 4 production and emission were affected by methane-oxidizing bacteria (methanotrophs). Therefore, it is significant to investigate the effects of fertilizer applications on the change of soil methanotrophs, which affected CH 4 emission. The objective of this paper was to describe changes of CH 4 and diversity and composition of methanotrophs in paddy soil in relation to the application of crop residues, mineral fertilizer, and manure based on a long-term field experiment. In this study, static chamber-gas chromatography technique, real-time polymerase chain reaction (PCR) and Illumina high-throughput sequencing of the 16S rRNA gene, respectively, were used to analyze the CH 4 emissions from paddy fields, soil methanotrophs abundance and community diversity from May to October 2014 under five fertilization treatments: mineral fertilizer (MF), rice residue and mineral fertilizer (RF), low manure rate and mineral fertilizer (LOM), and high manure rate and mineral fertilizer (HOM), as compared to without fertilizer input (CK). The results indicated that CH 4 from fertilization treatments displayed different emission patterns during early and late rice growth period. HOM treatment had the highest CH 4 emissions during early and late rice growth period with 5.074 and 6.099 g m -2 , respectively. Some methanotrophs genera (Methylosinus, Crenothrix, Methylocaldum, Methylomicrobium and Methylomonas) were identified at the early and late rice main growth stages. The abundance and composition of soil methanotrophs were affected by long-term fertilization managements. The methanotrophs abundance was inhibited under MF treatment, while they were stimulated under RF, LOM and HOM treatments. The abundance and community composition of methanotrophs in paddy soil were affected by fertilizers of mineral, crop residues, and manure. It was concluded that application with organic and crop residues enhance the abundance and community composition of methanotrophs in double-cropping paddy fields in Southern China through a long-term fertilizer experiment.

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Effect of CH4 concentrations and soil conditions on the induction of CH4 oxidation activity

Cited by 262 publications

References 34 publications

Modeling the impediment of methane ebullition bubbles by seasonal lake ice

Modeling the impediment of methane ebullition bubbles by seasonal lake ice

Abundance and community composition of methanotrophs in a Chinese paddy soil under long-term fertilization practices

Diversity and composition of methanotrophs in paddy soil as affected by different long-term fertilizer management from double-cropping paddy fields in Southern China

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