Ammonium Impacts Methane Oxidation and Methanotrophic Community in Freshwater Sediment.

ABSTRACT: Lacustrine ecosystems are regarded as one of the important natural sources of greenhouse gas methane. Aerobic methane oxidation, carried out by methane-oxidizing bacteria, is a key process regulating methane emission. And ammonium is believed to greatly influence aerobic methane oxidation activity. To date, disagreement exists in the threshold of ammonium effect. Moreover, knowledge about how aerobic methanotrophic community composition and functional gene transcription respond to ammonium is still lacking. In the present study, microcosms with freshwater lake sediment were constructed to explore the effect of ammonium level on aerobic methanotrophs. Methane oxidation potential, and the density, diversity and composition of pmoA gene and its transcripts were examined during 2-week i

SUBMITTER: Yang Y 

PROVIDER: S-EPMC7137091 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature