Methanogenic communities and methane emissions from enrichments of Brazilian Amazonia soils under land-use change

Alves, Kelly Jaqueline; Pylro, Victor Satler; Nakayama, Cristina Rossi; Vital, Vitor Gonçalves; Taketani, Rodrigo Gouvêa; Santos, Danielle Gonçalves; Rodrigues, Jorge L. Mazza; Mui, Tsai Siu; Andreote, Fernando Dini

doi:10.1016/j.micres.2022.127178

Cited by 10 publications

(3 citation statements)

References 36 publications

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“…Our findings confirm results by Meyer et al (2017), who reported that methylotrophic methanogenesis genes were significantly more abundant in pasture soils than in Amazon forest soils. These findings also support the idea that methylotrophy is an active methanogenesis pathway in Amazon soils that should be investigated further (Alves et al, 2022). Moreover, in microcosms supplemented with methanol, Alves et al (2022) found that Methanosarcina members could be responsible for methylotrophic methanogenesis in Amazon pasture soils.…”

Section: Discussionsupporting

confidence: 86%

“…These findings also support the idea that methylotrophy is an active methanogenesis pathway in Amazon soils that should be investigated further (Alves et al, 2022). Moreover, in microcosms supplemented with methanol, Alves et al (2022) found that Methanosarcina members could be responsible for methylotrophic methanogenesis in Amazon pasture soils. Methanosarcina was consistently the only taxon found in our study that could include methylotrophic methanogens.…”

Section: Discussionsupporting

confidence: 86%

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Shifts in functional traits and interactions patterns of soil methane‐cycling communities following forest‐to‐pasture conversion in the Amazon Basin

et al. 2023

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Deforestation threatens the integrity of the Amazon biome and the ecosystem services it provides, including greenhouse gas mitigation. Forest-to-pasture conversion has been shown to alter the flux of methane gas (CH4) in Amazonian soils, driving a switch from acting as a sink to a source of atmospheric CH4. This study aimed to better understand this phenomenon by investigating soil microbial metagenomes, focusing on the taxonomic and functional structure of methane-cycling communities. Metagenomic data from forest and pasture soils were combined with in situ CH4 fluxes and soil edaphic factors measurements and analysed using multivariate statistical approaches. We found a significantly higher abundance and diversity of methanogens in pasture soils. As inferred by co-occurrence networks, these microorganisms seem to be less interconnected within the soil microbiota in pasture soils.Metabolic traits were also different between land uses, with increased hydrogenotrophic and methylotrophic pathways of methanogenesis in pasture soils. Land-use change also induced shifts in taxonomic and functional traits of methanotrophs, with bacteria harboring genes encoding the soluble form of methane monooxygenase enzyme (sMMO) depleted in pasture soils. Redundancy analysis and multimodel inference revealed that the shift in methanecycling communities was associated with high pH, organic matter, soil porosity, and micronutrients in pasture soils. These results comprehensively characterize the effect of forest-to-pasture conversion on the microbial communities driving the methane-cycling microorganisms in the Amazon rainforest, which will contribute to the efforts to preserve this important biome.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionsupporting

confidence: 86%

Shifts in functional traits and interactions patterns of soil methane‐cycling communities following forest‐to‐pasture conversion in the Amazon Basin

et al. 2023

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“…The bacterial community is also responsible for CH 4 cycling and several factors affect the methanogenic community. The conversion from areas by forest to pasture changes the soil microbial community, increasing the abundance and action of methanogenic archaea, as a consequence of this, pasture tends to emit more methane into the atmosphere (Alves et al, 2022). Among the factors, soil moisture and the addition of nutrients may be the largest contributors to CH 4 emissions (Knief, 2019).…”

Section: Effect Of Land Use On Ch 4 Emissionmentioning

confidence: 99%

How does land use change affect the methane emission of soil in the Eastern Amazon?

Lage Filho,

Cardoso,

Azevedo

et al. 2023

Front. Environ. Sci.

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Methane emissions (CH4) from the soil increase according to changes made in forest soils and adverse edaphoclimatic factors. Soil temperature and nutrients will impact the activity of microorganisms, depending on land use. The objective of this study was to evaluate the impacts of land use, temperature, and nitrogen application on CH4 emissions from soils within the Amazon region. Three experiments were conducted in a completely randomized design. Each experiment consisted of five replicates to measure CH4 emissions. The variables examined in these experiments were: 1) three distinct land uses (forest, pasture, or agriculture; 2) soil temperatures (25, 30, 35, or 40°C); and 3) input of nitrogen to the soil (0, 90, 180, or 270 kg of N ha−1). In this study, the highest emissions occurred in pasture soils, with values of 470 μg of CH4 g−1 of dry soil, while forest and agricultural soils suffer the effects of CH4 oxidation. Temperature is a factor that contributes to CH4 emissions, and temperatures above 30°C tended to reduce gas emissions in the systems studied, since the highest emission was observed in pasture soil kept at 25°C (∼1,130 μg of CH4 g−1 of dry soil). Nitrogen fertilization in pasture soils reduces CH4 emitted nearly 140% as the dose increased. As a result, the pasture soils tended to emit higher concentrations of CH4 into the atmosphere. However, reducing these emissions from the pasture management employed is possible.

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Effects of salinity on methane emissions and methanogenic archaeal communities in different habitat of saline-alkali wetlands

Li,

et al. 2023

Environ Sci Pollut Res

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The increase in temperature caused by global climate change has promoted the salinization of wetlands.Inland saline-alkaline wetlands have an environment of over-humidity and shallow water and are hot spots for CH 4 emissions. However, there are few reports on the effect of salinity on CH 4 emissions in inland saline-alkaline wetlands. This study revealed the effects of salinity, habitat, and their interactions on CH 4 emissions, and explored the response of methanogenic archaea to salinity. Overall, salinity inhibited CH 4 emissions. But there were different responses in the three habitat soils. Salinity decreased the relative abundance of methanogenic archaea and changed the community structure. In addition, salinity changed soil pH and dissolved organic carbon (DOC) and ammonium (NH 4 + ) concentrations, which were signi cantly correlated with methanogenic archaea. Our study showed that salinity changed the soil physicochemical properties and characteristics of the methanogenic archaeal community, affecting CH 4 emissions.

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Methanogenic communities and methane emissions from enrichments of Brazilian Amazonia soils under land-use change

Cited by 10 publications

References 36 publications

Shifts in functional traits and interactions patterns of soil methane‐cycling communities following forest‐to‐pasture conversion in the Amazon Basin

Shifts in functional traits and interactions patterns of soil methane‐cycling communities following forest‐to‐pasture conversion in the Amazon Basin

How does land use change affect the methane emission of soil in the Eastern Amazon?

Effects of salinity on methane emissions and methanogenic archaeal communities in different habitat of saline-alkali wetlands

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