"Paper summarizes results of a longterm study on methanogen dynamics in hyporheic sediments of a small lowland stream Sitka. By use of various molecular methods we have shown that both methanogenic archaea and aerobic methanotrophs can be quantitatively dominant components of hyporheic biofilm community and may affect CH4 cycling in river sediments. Fluxes of CH4 from supersaturated interstitial sediments appear to be a main CH4 source toward the water column. Compared with CH4 production rates, the diffusive fluxes are very low due to efficient aerobic oxidation by methanotrophic bacteria, especially during higher flow discharges. Although fluxes to the atmosphere from the Sitka stream seems to be insignificant, they are comparable or higher in comparison with fluxes from other aquatic ecosystems, especially those measured in running waters. Finally, our results suggest that the Sitka Stream is a source of methane into the atmosphere, and loss of carbon via the fluxes of this greenhouse gas out into the ecosystem can participate significantly in river self-purification."@en . "7"^^ . "Paper summarizes results of a longterm study on methanogen dynamics in hyporheic sediments of a small lowland stream Sitka. By use of various molecular methods we have shown that both methanogenic archaea and aerobic methanotrophs can be quantitatively dominant components of hyporheic biofilm community and may affect CH4 cycling in river sediments. Fluxes of CH4 from supersaturated interstitial sediments appear to be a main CH4 source toward the water column. Compared with CH4 production rates, the diffusive fluxes are very low due to efficient aerobic oxidation by methanotrophic bacteria, especially during higher flow discharges. Although fluxes to the atmosphere from the Sitka stream seems to be insignificant, they are comparable or higher in comparison with fluxes from other aquatic ecosystems, especially those measured in running waters. Finally, our results suggest that the Sitka Stream is a source of methane into the atmosphere, and loss of carbon via the fluxes of this greenhouse gas out into the ecosystem can participate significantly in river self-purification." . "Bedna\u0159\u00EDk, Adam" . . . . . . "P(GA526/09/1639)" . "Rijeka" . . "6"^^ . . . "Badurov\u00E1, Pavl\u00EDna" . "Methanogenic system of a small lowland stream Sitka, Czech Republic"@en . "Brablcov\u00E1, Lenka" . "31"^^ . "Biomass now - cultivation and utilization" . "RIV/61989592:15310/13:33148283!RIV14-GA0-15310___" . "Gratzov\u00E1, Krist\u00FDna" . "Methanogenic system of a small lowland stream Sitka, Czech Republic" . . . . . "87537" . "10.5772/3437" . "Methanogenic system of a small lowland stream Sitka, Czech Republic"@en . "http://www.intechopen.com/books/biomass-now-cultivation-and-utilization/methanogenic-system-of-a-small-lowland-stream-sitka-czech-republic" . "Buri\u00E1nkov\u00E1, Iva" . . . "15310" . "methanogenesis, methane, river sediments, methanogens methanotrophy"@en . . . "Mach, V\u00E1clav" . "Rul\u00EDk, Martin" . "448"^^ . . . "InTech" . . "[D9C32C839BE7]" . . . "978-953-51-1106-1" . "Methanogenic system of a small lowland stream Sitka, Czech Republic" . . "RIV/61989592:15310/13:33148283" .