The effect of different light intensities: The extent of the
inhibitory effect of light on methane consumption in hypolimnetic
water depended on the light intensity (Fig. 4). Light intensity up to 12 mmol m22 s21 resulted in almost completely
inhibited methane consumption after 2 d. Even the
lowest light intensity (4.1 mmol m22 s21) in this study partly
inhibited methane consumption.