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Methane Emissions - Europe PMC

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Last Updated: 08 June 2022

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Non-native plant invasion can accelerate global climate change by increasing wetland methane and terrestrial nitrous oxide emissions.

"However, a systematic review of the effects of non-native plant invasion on GHG dynamics on a global scale has yet to be conducted, making it impossible to determine the exact biological response of non-native plant invasions to global climate change. " 0. 76 kg N 2 O ha -1 yr -1 in native sites to 1. 35 kg N 2 O ha -1 yr -1, but did not influence N 2 O emissions in forests or wetlands, according to Invasive plant species. "Our meta-analysis not only sheds light on the physiological causes of plant invasion's responses to plant invasion but also expands our current knowledge of the mechanisms responsible for plant migration's responses. ".

Source link: https://europepmc.org/article/MED/35665574


A 130-year global inventory of methane emissions from livestock: trends, patterns, and drivers.

"We estimated CH4 emissions from global livestock using the Tier 2 method we adopted from the 2019 Refinement to 2006 IPCC guidelines, with a spatial resolution of 0. 083-u00b0 between 1890 and 2020. " Tg CH 4 yr -1 in 1890 to 131. 7 yr -1 in 2019, a fourfold rise in the last 30 years. According to our latest Tier 1 results, livestock CH4 emissions are increasing at a faster rate than the FAOSTAT's estimate for the year 2019. The latest geospatial and global data on livestock CH4 emissions determines emission hotspots and trends, as well as spatial patterns, which will help guide meaningful CH4 mitigation strategies in the livestock industry on both local and global scales.

Source link: https://europepmc.org/article/MED/35642457


Application of 3-nitrooxypropanol and canola oil to mitigate enteric methane emissions of beef cattle results in distinctly different effects on the rumen microbial community.

"Background" is a newspaper that was published in 1996 and estimated at 2. 1 Gt of CO 2 equivalent, accounting for 4. 3 percent of global anthropogenic greenhouse gas emissions. Around the world, there are numerous attempts to produce CH4 mitigating inhibitors that specifically target rumen methanogens, with the ultimate aim of reducing the environmental footprint of ruminant livestock raising. Several studies investigated the individual and combined effects of supplementing a high-forage diet fed to beef cattle with the investigational CH 4 inhibitor 3-nitropropanol and canola oil on the rumen microbial community in connection with enteric CH 4 emissions and ruminal fermentation. 3-NOP raised H2 emissions 37-fold, while co-administering 3-NOP and OIL raised H 2 in the rumen 20-fold relative to the control diet. Conclusions Our results indicate a mechanistic view of CH 4 inhibition by 3-NOP and OIL when offered alone or in combination with cattle raised a high forage diet. 3-NOP specifically targeted rumen methanogens and partially inhibited the hydrogenotrophic methanogenesis pathway, which raised H2 emissions and propionate molar proportion in rumen fluid and reduced propionate molar proportions in rumen fluid. In comparison, OIL caused major changes in the rumen microbial community by indiscriminately altering the abundance of a variety of rumen microbes, lowering the prevalence of fibrolytic bacteria and protozoa, resulting in altered rumen fermentation. "Our results show that co-administering CH 4 inhibitors with specific mechanisms of action can both raise CH 4 inhibition and provide alternative sinks to prevent excessive accumulation of ruminal H 2. ".

Source link: https://europepmc.org/article/MED/35642048


Methane emissions from five Danish pig farms: Mitigation strategies and inventory estimated emissions.

"This report investigated whole-farm methane emissions from five Danish pig farms with different manure management techniques and compared measured emission rates to international and national greenhouse gas emission standards. " Quantified methane emissions ranged from 0. 2 to 20 kg/h on the farms with fattening pigs and no manure treatment, with no manure treatment, although the lowest emissions were found at farms with manure acidification. Fattening pig farms with biogasification and acidification plants were 55% and 91-93% lower, respectively, than those farms with no manure treatment. Methane emissions were estimated by 51% across all models and farms, with the Danish model showing the worst. The findings, as one of the first studies investigating whole-pig farm emissions, showed the promise of the applied measuring technique to determine mitigation strategy efficiencies and highlighted the need to investigate inventory model accuracy. ".

Source link: https://europepmc.org/article/MED/35642810


Impoundment increases methane emissions in Phragmites-invaded coastal wetlands.

"Yes, but widespread monitoring of coastal hydrology has restricted tidal exchange in large areas of coastal wetlands. " Understanding controls and scaling of carbon exchange in these understudied ecosystems is vital for determining the climate impacts of blue carbon restoration and/or management interventions. Using static chambers and investigation agents of carbon fluxes within an impounded coastal wetland in Wellfleet, MA, United States, we investigate how carbon fluxes change across a salinity gradient in impounded and natural, unrestricted Phragmites wetlands, employing eddy covariance at the Herring River in Wellfleet, MA, United States. Restoration of tidal flow to impounded ecosystems could limit CH 4 production and raise their climate regulation benefits. ".

Source link: https://europepmc.org/article/MED/35616054


Measurement of methane emissions from CNG fueling stations in East China.

"However, currently, there is no measurement data on methane emissions from natural gas fueling stations in China. " According to the Environmental Protection Agency's Other Test Method 33A, a downwind quantification strategy was used to directly measure the methane emissions of nine compressed natural gas fueling stations in East China. The emissions from gas fueling stations could be divided into intermittent emissions and continuous emissions, of which intermittent emissions were the most significant source of methane. ".

Source link: https://europepmc.org/article/MED/35606586


Spatial variability of Methane and Carbon dioxide emissions from an active municipal solid waste dumpsite under various surface physicochemical conditions

"Surface methane and carbon dioxide emissions from an open, working municipal solid waste dumpsite in Colombo, Sri Lanka, were tested. " According to the respective studies, the superficial average emission rates of CH 4 and CO 2 were 10,672 mg m -2 h -1 and 40,827 mg m -2 h -1. The highest average flux rate has been reported from trenches that leachate flows, and the lowest from the old mixed waste layer covered by compacted soil layer. In comparison, humidity content and organic matter content have a positive correlation with the rate of CH 4 flux. The surface layer's CH 4 oxidation capacity is dependent on its physical environment and revealed vegetation, which promotes CH 4 oxidation. To prevent landfill gas migration from MSW disposal sites, proper water drainage and leachate treatment are required, according to the findings.

Source link: https://europepmc.org/article/PPR/PPR495953


Measurement Duration but Not Distance, Angle, and Neighbour-Proximity Affects Precision in Enteric Methane Emissions when Using the Laser Methane Detector Technique in Lactating Dairy Cows.

"The laser methane detector, which is attached to a proprietary hand-held open path laser measuring unit, is a single-point laser measurement unit. " There is no difference between enteric methane measurements taken from a distance of 3 meters to those taken at a distance of 45 m; there was no effect on the measurements when the measurement angle was adjusted from 90 b0 to 45; and that the presence of an adjacent animal had no effect on the measurements; and that measurements lasting up to 240 s are more precise than those taken for a shorter time. ".

Source link: https://europepmc.org/article/MED/35625141


Methane emissions from forested closed landfill sites: Variations between tree species and landfill management practices.

"Ree stem emissions from landfill sites exhibit significant temporal and spatial variation in temperate environments and account for more than half of the total surface CH 4 flux. " In this research, emission dispersion was even greater investigated by determining CH4 and CO 2 fluxes from landfill sites with different management strategies and different tree species over a 7-month period. 1. 2 h -2 h -1, respectively, according to 47. 2 bcg m -2 h -1, average tree stem CH4 fluxes from sites with no clay cap but no such trace, clay cap, and no gas extraction were achieved on average, while tree stem CH4 fluxes from sites with no clay cap, but gas extraction, clay cap, and no gas extraction were 1. 6 h -1, respectively. There was no difference in stem CH4 fluxes between species at each location, suggesting that environmental conditions and site age had a greater effect on both stem and soil fluxes. ".

Source link: https://europepmc.org/article/MED/35595131


Fencing farm dams to exclude livestock halves methane emissions and improves water quality.

"Agricultural practices have created tens of millions of small artificial water bodies to provide water to domestic livestock around the world. Farm dams have some of the highest greenhouse gas emissions per meter 2 among freshwater ecosystems, as a result of fertilizer and manure run-off increasing methane production, a highly potent GHG. We ran a large-scale experiment that spanned 400 kilometers through south-eastern Australia, where we compared unfenced and fenced farm dams within 17 livestock farms. We found no effect of farm dam construction on diffusive carbon dioxide pollution and organic carbon in the soil. A change from positive to negative CO 2 eq was shown in dams with very high dissolved oxygen content.

Source link: https://europepmc.org/article/MED/35562855

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions