Fig. 6

Differences in CAZy genes between the two sampling sites and soil profiles

LAV, Val Lavirun; VRS, Villum Research Station; aL, active layer; pF, permafrost

The log₂-fold change (LFC) value pF vs. aL in LAV (A) and in VRS (B) is the log₂ of (gene abundance of pF/gene abundance of aL). The LFC value LAV vs. VRS is the log₂ of (gene abundance of LAV_aL/gene abundance of VRS_aL) for aL (C) and the log₂ of (gene abundance of LAV_pF/gene abundance of VRS_pF) for pF (D). For each pairwise comparison, only genes with a base mean > 50, p < 0.01, and LFC > 2.5 were selected; the genes are sorted by their functions in the depolymerization of carbon substrates. Glycosyl transferases are not shown. A list of all selected genes with their relative abundances, CAZy classifications and associated enzymatic activities is provided in Additional file 1, Tables S13-16. [AA], auxiliary activities; [CBM], carbohydrate-binding modules; [CE], carbohydrate esterases; [GH], glycoside hydrolases; [PL], polysaccharide lyases