Fig 2. The effect of experimental N deposition on the relative abundance of genes associated with N cycle transformations.

All genes presented were significantly different in abundance between the ambient (open bars) and experimental N deposition treatment (closed bars; adjusted P < 0.05). Data are shown by treatment unless the site × treatment P < 0.05, in which case the data are presented by site. Abundance data can be found in S2 and S3 Tables. * P < 0.05; result of pairwise tests can be found in S3 Table.