In situ Methane Production from Acid Peat in Plant Communities with Different Moisture Regimes in a Subarctic Mire

Svensson, Bo; Rosswall, T.

doi:10.2307/3544151

Cited by 194 publications

(102 citation statements)

References 11 publications

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“…The perturbed conditions were those calculated using the water table There is a small increase ( 5 to 13 % ) in methane flux from a temperature increase of 0.8 or 2.0°C at a peat depth of 10 cm, based on field temperature: flux relationships . Laboratory and field studies of this relationship for similar peats have found stronger increases in methane production with rising temperature, with Q 10 values generally ranging between 2 and 3 (e.g., Svensson and Rosswall, 1984;Williams and Crawford, 1984 ); this would produce predicted increases in methane emission of up to 40 % .…”

Section: Resultsmentioning

confidence: 99%

“…These crude, simplistic calculations suggest that the methane-climate feedback for subarctic fens is very sensitive to small changes in the physical Crill et al (1988), Harriss et al (1982Harriss et al ( , 1988Harriss et al ( , 1985, Knowles (1989, 1990), , Sebacher et al ( 1986 ), Svensson and Rosswall ( 1984 ), Whalen and Reeburgh ( 1988 ), Wilson et al ( 1989 ). The solid line indicates the best fit (CH 4 = 116.7e 0 · 096 w'; r 2 = 0.38; Sy= 0.71) developed from the Schefferville data for the Capricorn fen .…”

Section: Resultsmentioning

confidence: 99%

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Northern fens: methane flux and climatic change

Roulet

Moore

Bubier

et al. 1992

Tellus B: Chemical and Physical Meteorology

183

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Methane flux from northern peatlands is believed to be an important contribution to the global methane budget. High latitude regions are predicted to experience significant changes in surface temperature and precipitation associated with the 2 x C0 2 climate scenarios, but the effects of these changes on methane emission are poorly understood. A peatland hydrologic model predicted June-August decreases in water storage of between 82 and 144 mm, using as inputs increases in temperatures of 3 °C and rainfall of 1 mm d -1 • These changes translate into a water table drop, relative to the peat surface, of between 14 and 22 cm, depending on whether the fen has a floating or non-floating surface. The 3 °C air temperature increase was predicted to raise peat temperature at 10 cm depth by 0.8 °C. These changes were then applied to relationships derived at a subarctic fen for water table: methane flux: temperature at 10 cm depth. Increased temperatures raise the methane flux by between 5 and 40 % , but the lowered water table decreases methane flux by 74 and 81 % , at the floating and non-floating fen sites, respectively. These results suggest that methane emissions from northern peatlands are more sensitive to changes in moisture regime than temperature within the range of changes predicted for 2 x C0 2 scenarios.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Northern fens: methane flux and climatic change

Roulet

Moore

Bubier

et al. 1992

Tellus B: Chemical and Physical Meteorology

183

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“…The development of different microhabitats within peatlands, such as hummocks, lawns, and hollows, gives rise to spatial patterns of the environmental conditions (Robroek et al, 2014) which in turn affect methane emissions (Svensson and Roswall, 1984). In addition, these microhabitats are characterized by a different set of peat mosses and accompanying vascular plants (Saarnio et al, 1997;Rydin and Jeglum, 2006;Robroek et al, 2009) which ultimately control the quantity and quality of the organic matter available for microbial decomposition (Kettunen and Kaitala, 1996;Galand et al, 2003;Andersen et al, 2013;Jassey et al, 2013).…”

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confidence: 99%

Nitrogen and methanogen community composition within and among three Sphagnum dominated peatlands in Scandinavia

Martí

Juottonen

Robroek

et al. 2015

Soil Biology and Biochemistry

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Ombrotrophic raised bogs are nutrient poor acidic peatlands accumulating organic matter.They are widely spread on northern latitudes and are substantial sources of methane emissions to the atmosphere being of great concern from a climate change perspective. We investigated the methanogen community composition along microtopographic gradients within three bogs in Scandinavia, receiving different amounts of nitrogen precipitation.Methanogenic community analyses by terminal restriction fragment length polymorphism of the mcrA gene showed different profiles among the three sites, while no influence of the microtopographic gradients was observed. Peat temperature and dissolved organic carbon were the major edaphic variables explaining 38% of the variation of the methanogenic community diversity among the bogs. The family Methanoregulaceae (hydrogenotrophic methanogens) showed the largest relative proportion and highest activity in all three sites.

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“…Changes in both substrate availability and oxidation state during the growing season affect the population dynamics of methanogenic and methanotrophic bacteria (Svensson and Rosswall, 1984;Whiting and Chanton, 1993) and are reflected in the net CH 4 flux (Kettunen et al, 1999).…”

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confidence: 99%

Modelling CH<sub>4</sub> emissions from arctic wetlands: effects of hydrological parameterization

et al. 2008

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In situ Methane Production from Acid Peat in Plant Communities with Different Moisture Regimes in a Subarctic Mire

Cited by 194 publications

References 11 publications

Northern fens: methane flux and climatic change

Northern fens: methane flux and climatic change

Nitrogen and methanogen community composition within and among three Sphagnum dominated peatlands in Scandinavia

Modelling CH<sub>4</sub> emissions from arctic wetlands: effects of hydrological parameterization

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In situ Methane Production from Acid Peat in Plant Communities with Different Moisture Regimes in a Subarctic Mire

Cited by 194 publications

References 11 publications

Northern fens: methane flux and climatic change

Northern fens: methane flux and climatic change

Nitrogen and methanogen community composition within and among three Sphagnum dominated peatlands in Scandinavia

Modelling CH&lt;sub&gt;4&lt;/sub&gt; emissions from arctic wetlands: effects of hydrological parameterization

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Modelling CH<sub>4</sub> emissions from arctic wetlands: effects of hydrological parameterization