Burkholderiaceae Are Key Acetate Assimilators During Complete Denitrification in Acidic Cryoturbated Peat Circles of the Arctic Tundra.

ABSTRACT: Cryoturbated peat circles (pH 4) in the Eastern European Tundra harbor up to 2 mM pore water nitrate and emit the greenhouse gas N₂O like heavily fertilized agricultural soils in temperate regions. The main process yielding N₂O under oxygen limited conditions is denitrification, which is the sequential reduction of nitrate/nitrite to N₂O and/or N₂. N₂O reduction to N₂ is impaired by pH < 6 in classical model denitrifiers and many environments. Key microbes of peat circles are important but largely unknown catalysts for C- and N-cycling associated N₂O fluxes. Thus, we hypothesized that the peat circle community includes hitherto unknown taxa and is essentially unable to efficiently perform complete de

SUBMITTER: Hetz SA 

PROVIDER: S-EPMC7892595 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature