Corrigendum to “Biological nitrogen fixation in peatlands: Comparison between acetylene reduction assay and 15N2 assimilation methods” [Soil Biology and Biochemistry 131 (2019) 157–165]

Seasonal and Spatial Variability of Biological N2 Fixation in a Cool Temperate Bog

“…Despite the similar conversion ratios at Mer Bleue bog, we acknowledge that the use of optimal laboratory conditions to calculate conversion ratios may introduce uncertainties in N 2 fixation rate estimates. Another unexplored source of uncertainty in our N 2 fixation estimates might include the temporal variability of the conversion ratio (Saiz, Sgouridis, Drijfhout, & Ullah, 2021; Soper et al., 2021) that could arise for example, from methanotrophic activity in Sphagnum (Larmola et al., 2014; Vile et al., 2014). However, the nature of the temporal variability and whether there is seasonality in conversion ratios in Sphagnum mosses remains unknown.…”

“…Recent studies showed that estimating N 2 fixation rates in peatlands using the ARA methods can result in considerable over‐ or underestimation likely due to the presence of diazotrophic methane‐oxidizing bacteria (Larmola et al., 2014; Saiz, Sgouridis, Drijfhout, & Ullah, 2021). To minimize the bias in ARA‐derived estimates, site‐specific conversion ratios were derived using the 15 N 2 tracer method.…”