Fig. 5.

Abundance and family-level affiliation of dsrB genes in sediments from Vilhelmsborg Sø (a, b) and Skanderborg Sø (c, d). For each panel, left bars represent ES sediments, and right bars represent ES-free sediments. Stacked bar plots (b, d) show mean relative abundance for the ten most abundant dsrB families detected; oxidative type dsrB families are marked by an asterisk. For unclassified dsrB families, the next higher classified taxonomic rank is given. For details, see Figs. S3 and S4.