Methane emission from tropical savanna &amp;lt;i&amp;gt;Trachypogon sp.&amp;lt;/i&amp;gt; grasses

Sanhueza, Eugenio; Donoso, Loreto

doi:10.5194/acp-6-5315-2006

Cited by 35 publications

(21 citation statements)

References 21 publications

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“…The fundamental explanation for the difference between our real-time [CH 4 ] measurements (Fig. 3), and the findings of others using static incubation chambers (Keppler et al, 2006;Sanhueza & Donoso, 2006;Terazawa et al, 2007), deserve further investigation. Until experimental evidence for substantial aerobic CH 4 emissions from plants independently confirms the original observations, it may be premature to conclude that high CH 4 concentrations in the tropical troposphere inferred from remote sensing (Frankenberg et al, 2005(Frankenberg et al, , 2006Bergamaschi et al, 2007), and measured above the Venezuelan savanna-forest boundary (Crutzen et al, 2006), and Brazilian rainforests (Carmo et al, 2006;Miller et al, 2007) support the phenomenon.…”

Section: Discussioncontrasting

confidence: 58%

Missing methane emissions from leaves of terrestrial plants

Beerling

Gardiner

Leggett

et al. 2008

Global Change Biology

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The controversial claim that attached leaves of terrestrial plants emit CH 4 aerobically remains to be corroborated. Here, we report CH 4 fluxes and CO 2 exchange rates for leaves of the C 4 species Zea mays using a high-accuracy traceable online analytical system. In contrast to earlier results for Z. mays, our measurements provide no evidence for substantial aerobic CH 4 emissions from photosynthesizing leaves illuminated with photosynthetically active radiation (k 5 400-700 nm), or from dark-respiring leaves. Preliminary measurements with the same system indicated a similar lack of aerobic CH 4 emissions in the light or dark from leaves of the C 3 species Nicotiana tabacum. These findings are supported by independent high-precision 13 C-labeling studies that also failed to confirm substantial aerobic CH 4 emissions from plants. Nevertheless, we are not able to exclude the possibility that CH 4 emissions from plants may be linked to nonenzymatic processes with an action spectrum lying outside the wavelength range for photosynthesis.

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Section: Discussioncontrasting

confidence: 58%

Missing methane emissions from leaves of terrestrial plants

Beerling

Gardiner

Leggett

et al. 2008

Global Change Biology

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“…CH 4 fluxes varied from −0.95 to 0.13 mg m −2 h −1 (Castaldi et al 2006). Sanhueza and Donoso (2006) (Otter and Scholes 2000). Soil compaction by grazing animals may increase CH 4 emission rates from soil in wet seasons.…”

Section: Extensively Grazed Pastures and Rangeland Soilsmentioning

confidence: 99%

Magnitude and biophysical regulators of methane emission and consumption in the Australian agricultural, forest, and submerged landscapes: a review

Dalal¹,

Allen²,

et al. 2007

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Increases in the concentrations of atmospheric greenhouse gases, carbon dioxide (CO 2 ), methane (CH 4 ), nitrous oxide (N 2 O) due to human activities are associated with global climate change. CO 2 concentration in the atmosphere has increased by 33% (to 380 ppm) since 1750 AD, whilst CH 4 concentration has increased by 75% (to 1,750 ppb), and as the global warming potential (GWP) of CH 4 is 25 fold greater than CO 2 it represents about 20% of the global warming effect. The purpose of this review is to: (a) address recent findings regarding biophysical factors governing production and consumption of CH 4 , (b) identify the current level of knowledge regarding the main sources and sinks of CH 4

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“…In temperate and tropical grasslands grazing generally decreased consumption (Zhou et al, 2008; Chen et al, 2010, 2011; Wang et al, 2012). Clipping was found to increase CH 4 consumption in tropical savannah (Sanhueza and Donoso, 2006). Thinning of the trees decreased CH 4 consumption in one temperate forest (Dannenmann et al, 2007), but not another (Wu et al, 2011).…”

Section: Ecosystem and Vegetation Effects On Methane Uptakementioning

confidence: 99%

Environmental impacts on the diversity of methane-cycling microbes and their resultant function

Aronson¹,

Allison²,

Helliker³

2013

Front. Microbiol.

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Methane is an important anthropogenic greenhouse gas that is produced and consumed in soils by microorganisms responding to micro-environmental conditions. Current estimates show that soil consumption accounts for 5–15% of methane removed from the atmosphere on an annual basis. Recent variability in atmospheric methane concentrations has called into question the reliability of estimates of methane consumption and calls for novel approaches in order to predict future atmospheric methane trends. This review synthesizes the environmental and climatic factors influencing the consumption of methane from the atmosphere by non-wetland, terrestrial soil microorganisms. In particular, we focus on published efforts to connect community composition and diversity of methane-cycling microbial communities to observed rates of methane flux. We find abundant evidence for direct connections between shifts in the methane-cycling microbial community, due to climate and environmental changes, and observed methane flux levels. These responses vary by ecosystem and associated vegetation type. This information will be useful in process-based models of ecosystem methane flux responses to shifts in environmental and climatic parameters.

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Methane emission from tropical savanna <i>Trachypogon sp.</i> grasses

Cited by 35 publications

References 21 publications

Missing methane emissions from leaves of terrestrial plants

Missing methane emissions from leaves of terrestrial plants

Magnitude and biophysical regulators of methane emission and consumption in the Australian agricultural, forest, and submerged landscapes: a review

Environmental impacts on the diversity of methane-cycling microbes and their resultant function

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