Additional file 1 of Winter warming in Alaska accelerates lignin decomposition contributed by Proteobacteria

Additional file 1: Supplementary Figure 1. Distribution of 16S rRNA gene copy numbers along buoyant density of the samples in warmed and control samples. Supplementary Figure 2. The average relative abundance of (a) Burkholderia and (b) Alphaproteobacteria among 13C-labelled DNA. Supplementary Figure 3. The Napierian logarithm of relative abundances of Burkholderia at different time points of the experiment, as revealed by 16S rRNA gene amplicon sequencing. Supplementary Figure 4.Z-P plot showing the distribution of OTUs based on their topological roles. Supplementary Figure 5. Growth curves of Burkholderia strains AK3 and AK1 in defined BMM medium with alkaline lignin as the sole C substrate (n=3). Supplementary Figure 6. Predicted lignin decomposition pathway in Burkholderia AK1 and AK3. Supplementary Figure 7. (a) The number of 13C-labelled 16S rRNA gene copies of Bradyrhizobium; (b) The number of 13C-labelled 16S rRNA gene copies of Methylobacterium. Supplementary Figure 8. Relative abundances of active α-Proteobacteria at different time points during the experiment, as revealed by 16S rRNA gene amplicon sequencing.