Spatial distribution and inhibition by ammonium of methane oxidation in intertidal freshwater marshes.

Applied and Environmental Microbiology
F Van Der NatHendrikus J Laanbroek

Abstract

In two intertidal marshes, the vertical distribution in the sediment and inhibition by ammonium of methane oxidation were investigated by slurry incubation experiments. The two sites differ in their dominant vegetation type, i.e., reed and bulrush, and in their heights above sea level. The reed site was elevated with respect to the bulrush site, resulting in a lower frequency and duration of flooding and, consequently, a higher potential for methane oxidation. Methane oxidation decreased with depth in the bulrush and reed slurries, although methane oxidation associated with root material from the bulrush plants increased with depth. Reed root material had a limited capacity for methane oxidation and showed no significant increase with depth. Inhibition of methane oxidation by ammonium was observed in all samples and depended on methane and ammonium concentrations. Increasing ammonium concentrations resulted in greater inhibition, and increasing methane concentrations resulted in less. Ammonium concentrations had to exceed methane concentrations by at least 30-fold to become effective for inhibition. This ratio was found only in the surface layer of the sediment. Hence, the ecological relevance for ammonium inhibition of methane...Continue Reading

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Citations

Aug 1, 2020·Frontiers in Microbiology·Elias BromanFrancisco J A Nascimento
Jun 15, 2011·Applied Microbiology and Biotechnology·Na YangLiming Shao
May 26, 2001·Applied and Environmental Microbiology·G Eller, P Frenzel
Mar 1, 2004·FEMS Microbiology Ecology·Paul L E Bodelier, Hendrikus J Laanbroek
Jul 6, 2010·Applied and Environmental Microbiology·Györgyi NyergesLisa Y Stein
May 10, 2002·Environmental Microbiology·Jennifer L MacaladyKate M Scow
Nov 9, 2015·Ecotoxicology and Environmental Safety·Jay Shankar Singh, P J Strong

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