Methane stimulates massive nitrogen loss from freshwater reservoirs in India.

ABSTRACT: The fate of the enormous amount of reactive nitrogen released to the environment by human activities in India is unknown. Here we show occurrence of seasonal stratification and generally low concentrations of dissolved inorganic combined nitrogen, and high molecular nitrogen (N₂) to argon ratio, thus suggesting seasonal loss to N₂ in anoxic hypolimnia of several dam-reservoirs. However, ¹⁵N-experiments yielded low rates of denitrification, anaerobic ammonium oxidation and dissimilatory nitrate reduction to ammonium-except in the presence of methane (CH₄) that caused ~12-fold increase in denitrification. While nitrite-dependent anaerobic methanotrophs belonging to the NC10 phylum were present, previously considered aerobic methanotrophs were far m

SUBMITTER: Naqvi SWA 

PROVIDER: S-EPMC5871758 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature