Methane oxidation rates at and below the oxycline.

<p>(a) Methane oxidation rates in different incubation setups from an oxic depth (8 m), the oxycline (9 m) and anoxic depths (10 m, 11 m). (b) Methane oxidation time series under dark (with and without added O₂) and light conditions with water from 9 m depth. Note that the addition of oxygen resulted in higher initial methane oxidation rates which ceased during the course of the incubation whereas light treatment resulted in steady linear rates.