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Figure S1. Score plot of the PCA of environmental factors in WT gradient shown in Fig. 3.

Figure S2. Redundancy analysis (RDA) of statistically significant environmental factors and methanogen communities. The length of an arrow describes the degree of explanation of environmental factor. The first two axes explained 28.0% of the compositional variation.

Figure S3. Maximum likelihood tree of partial mcrA sequences (128 aa) from Suonukkasuo fen clones (in bold) and reference methanogen sequences. Size of terminal restriction fragment is indicated for each group. Scale indicates 10% sequence divergence. Nodes with bootstrap values 95% are marked with filled circles and 75% with open circles. The tree was rooted with Methanopyrus kandleri. In bold sequence names Suon1, Suon2 and Suon4 refer to locations S1, S2 and S4 of the water table gradient.

Table S1. Number of point mutations (integers) between different pmoA allele sequences and standard errors (in parenthesis) of pairwise distance calculations. Accession numbers in Genbank are GQ279342 (T), GQ279343 (S), GQ279344 (R), GQ279345 (M) and GQ279346 (O), respectively.

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GCB_2290_sm_fig-s2.tif9158KSupporting info item
GCB_2290_sm_fig-s3.tif17380KSupporting info item
GCB_2290_sm_table-s1.doc9KSupporting info item

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