A comparison of dynamic and static chambers for methane emission measurements from subarctic fens

Moore, Tim R.; Roulet, Nigel T.

doi:10.1080/07055900.1991.9649395

Cited by 49 publications

(22 citation statements)

References 14 publications

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“…Both bryophyte and vascular plant species at each site were identified, and percent cover was determined for each collar. CH4 emissions were measured using a static chamber method [Moore and Roulet, 1991]. At each of the 22 sites, 3 replicate collars, 26 cm in diameter, were cut into the peat and remained in place during the sampling season to minimize disturbance.…”

Section: Methodsmentioning

confidence: 99%

Methane emissions from wetlands in the zone of discontinuous permafrost: Fort Simpson, Northwest Territories, Canada

Liblik¹,

Moore²,

Bubier³

et al. 1997

Global Biogeochemical Cycles

102

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Section: Methodsmentioning

confidence: 99%

Methane emissions from wetlands in the zone of discontinuous permafrost: Fort Simpson, Northwest Territories, Canada

Liblik¹,

Moore²,

Bubier³

et al. 1997

Global Biogeochemical Cycles

102

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“…Methane fluxes across the soil-atmosphere interface were measured with static transparent chambers (30 cm 9 30 cm 9 30 cm) modified from Moore and Roulet (1991). At the top, the chambers were fitted with butyl rubber stoppers serving to equilibrate pressure and to provide sampling ports.…”

Section: Determination Of Methane Emission Using Static Flux Chambersmentioning

confidence: 99%

“…Northern peatlands store between 370 and 455 Gt of carbon (Gorham 1991;Turunen et al 2002). Methane release from these peatlands is highly variable seasonally and at spatial scales ranging from microtopographic to regional (e.g., Bartlett et al 1992; Morrissey and Livingston 1992;Shannon and White 1994;Bubier et al 1995;Christensen et al 1995;Moore and Roulet 1991;Bellisario et al 1999;Joabsson and Christensen 2001;Kutzbach et al 2004;Whalen 2005;Strack and Waddington 2008).…”

Section: Introductionmentioning

confidence: 99%

Methane emissions from an alpine fen in central Switzerland

2011

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Methane emissions and below ground methane pore water concentrations were determined in an alpine fen at 1,915 m a.s.l. in central Switzerland. The fen represented an acidic (pH 4.5-4.9), nutrient-poor to mesotrophic habitat dominated by Carex limosa, Carex rostrata, Trichophorum caespitosum and Sphagnum species. From late fall to late spring the fen was snow-covered. Throughout winter the temperatures never dropped below 0°C at 5 cm below the vegetation surface. Methane emissions in June, July, August and September were in the range of 125 (±26)-313 (±71) mg CH 4 m -2 day -1 with a tendency to decrease along the summer season. Mean methane pore water concentrations at a depth of 20-40 cm below the vegetation surface were 526 (±32) lM in June and in the range of 144 (±10)-233 (±7) lM in July, August and September. At a depth of 0-20 cm the mean methane pore water concentrations dropped back to \20 lM with an almost linear decrease between 0 and 15 cm. Oxygen pore water concentrations were close to air saturation in the first few centimeters and dropped back below detection limit at a depth of 20 cm. In July and August the pore water concentrations of dissolved organic carbon (DOC) were in the range of 7.2-10.1 mg C l -1 at all depths. The pore water concentrations of acetate, formate and oxalate were in the range of 2.0-8.2 lM at all depths. Methanotrophic and methanogenic communities were quantified using pmoA and mcrA, respectively, as marker genes. The abundances of both communities showed a distinct peak at a depth of 10-15 cm below the vegetation surface.

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“…The fielu work lor this stuuy was eonuueteu as part of a BüREAS Trace Gas Statie !loating chambers were employed to measure dit1iIsion of CI!., acl'llss the watcr-air intertàce approximatcly every thinl day during the ticld season using methods outlined in Moore and Roulet (1991). The chambers were made of 18 L polyearbonale bOilles trom which the bases had been removed, and were covered with aluminum Ibil to reduce heating.…”

Section: Sindy Sitementioning

confidence: 99%