Methane oxidation in anoxic lake water stimulated by nitrate and sulfate addition

Methanotrophic bacteria play a key role in limiting methane emissions from lakes. It is generally assumed that methanotrophic bacteria are mostly active at the oxic-anoxic transition zone in stratified lakes, where they use oxygen to oxidize methane. Here, we describe a methanotroph of the genera Methylobacter that is performing high-rate (up to 72 μM day-1 ) methane oxidation in the anoxic hypolimnion of the temperate Lacamas Lake (Washington,...