Effects of Imposed Salinity Gradients on Dissimilatory Arsenate Reduction, Sulfate Reduction, and Other Microbial Processes in Sediments from Two California Soda Lakes

Volume 73, no. 16, p. 5130-5137, 2007. Page 5134: A miscalculation was made during the conversion of units for the measured N₂O concentrations in sediment denitrification bioassays reported in Fig. 4B and the associated discussion in the text. The reported N₂O production rates are too high by a factor of 1/0.028, or 36-fold, as they were not corrected for the headspace volume of the bioassay serum bottles (28 ml). The correct ranges of N₂O production rates are 0.001 to 1.8 μmol cm⁻³ day⁻¹ for Mono Lake samples and 0.01 to 0.5 μmol cm⁻³ day⁻¹ for Searles Lake samples. Our observations regarding the effects of salinity on denitrification, as well as the other major implications of the study, however, are not affected by this correction.