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Methane oxidation rates observed in a topsoil covering a retired landfill are the highest reported (45 g m day) for any environment. This microbial community had the capacity to rapidly oxidize CH(4) at concentrations ranging from <1... more
Methane oxidation rates observed in a topsoil covering a retired landfill are the highest reported (45 g m day) for any environment. This microbial community had the capacity to rapidly oxidize CH(4) at concentrations ranging from <1 ppm (microliters per liter) (first-order rate constant [k] = -0.54 h) to >10 ppm (k = -2.37 h). The physiological characteristics of a methanotroph isolated from the soil (characteristics determined in aqueous medium) and the natural population, however, were similar to those of other natural populations and cultures: the Q(10) and optimum temperature were 1.9 and 31 degrees C, respectively, the apparent half-saturation constant was 2.5 to 9.3 muM, and 19 to 69% of oxidized CH(4) was assimilated into biomass. The CH(4) oxidation rate of this soil under waterlogged (41% [wt/vol] H(2)O) conditions, 6.1 mg liter day, was near rates reported for lake sediment and much lower than the rate of 116 mg liter day in the same soil under moist (11% H(2)O) con...
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Methane concentrations and oxidation rates were measured in the water column and sediments of the Black Sea at a central station during leg 5 of the 1988 USTurkey Black Sea Expedition. Methane concentrations were 10 nM in the upper 100... more
Methane concentrations and oxidation rates were measured in the water column and sediments of the Black Sea at a central station during leg 5 of the 1988 USTurkey Black Sea Expedition. Methane concentrations were 10 nM in the upper 100 m, increased to 11 μM ...
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Anaerobic methane oxidation is a general process important in controlling fluxes of methane from anoxic marine sediments. The responsible organism has not been isolated, and little is known about the electron acceptors and substrates... more
Anaerobic methane oxidation is a general process important in controlling fluxes of methane from anoxic marine sediments. The responsible organism has not been isolated, and little is known about the electron acceptors and substrates involved in the process. Laboratory evidence indicates that sulfate reducers and methanogens are able to oxidize small quantities of methane. Field evidence suggests anaerobic methane oxidation may be linked to sulfate reduction. Experiments with specific inhibitors for sulfate reduction (molybdate), methanogenesis (2-bromoethanesulfonic acid), and acetate utilization (fluoroacetate) were performed on marine sediments from the zone of methane oxidation to determine whether sulfate-reducing bacteria or methanogenic bacteria are responsible for methane oxidation. The inhibition experiment results suggest that methane oxidation in anoxic marine sediments is not directly mediated by sulfate-reducing bacteria or methanogenic bacteria. Our results are consistent with two possibilities: anaerobic methane oxidation may be mediated by an unknown organism or a consortium involving an unknown methane oxidizer and sulfate-reducing bacteria.
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... A METHANE FLUX TRANSECT ALONG THE TRANS-ALASKA PIPELINE-HAUL ROAD 239 vals along the entire length of the road from Livengood in the ... 1) consists of a black spruce (Piceamariana) forest with an undergrowth of mosses, grasses and... more
... A METHANE FLUX TRANSECT ALONG THE TRANS-ALASKA PIPELINE-HAUL ROAD 239 vals along the entire length of the road from Livengood in the ... 1) consists of a black spruce (Piceamariana) forest with an undergrowth of mosses, grasses and shrubs at upland sites. ...
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... Res. 91, 11791−11802 (1986). | ChemPort |. 23. Seiler, W., Conrad, R. &amp;amp;amp; Scharffe, D. J. atmos. Chem. 1, 171−186 (1984). | Article | ChemPort |. 24. Whalen, SC &amp;amp;amp; Reeburgh, WS Tellus B42, 237−249 (1990).... more
... Res. 91, 11791−11802 (1986). | ChemPort |. 23. Seiler, W., Conrad, R. &amp;amp;amp; Scharffe, D. J. atmos. Chem. 1, 171−186 (1984). | Article | ChemPort |. 24. Whalen, SC &amp;amp;amp; Reeburgh, WS Tellus B42, 237−249 (1990). 25. King, SL, Quay, PD &amp;amp;amp; Lansdown, JM J. geophys. Res. ...
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... Methane concentrations of 80 yuM are reported for Lake Nitinat (Atkinson and Richards 1967). ... These organisms are active throughout the water column during spring and fall overturn, whenade-quate quantities of oxygen and inorganic... more
... Methane concentrations of 80 yuM are reported for Lake Nitinat (Atkinson and Richards 1967). ... These organisms are active throughout the water column during spring and fall overturn, whenade-quate quantities of oxygen and inorganic nitrogen are present, and appear to ...
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1182 Notes High phytoplankton growth and production rates in the North Pacific subtropical gyre. Limnol. Oceanogr. 32:905-918. —, WG Harrison, and GR DiTullio. 1985. A comparison of nitrogen assimilation rates based on 15N uptake and... more
1182 Notes High phytoplankton growth and production rates in the North Pacific subtropical gyre. Limnol. Oceanogr. 32:905-918. —, WG Harrison, and GR DiTullio. 1985. A comparison of nitrogen assimilation rates based on 15N uptake and autotrophic protein synthesis. ...