FIG 4.
Constrained ordination biplots (redundancy analysis [RDA] on weighted UniFrac distance) of microbial community composition and the different environmental drivers (O2, NO3−, NO2−, NH4+ and SO42−) for Lake Baldegg (A) and Lake Sarnen (B). The percentage of the variance explained for each component is labeled on the x and y axes. In Lake Baldegg, the two main components (CPA1 and CPA2) explained 72% of the variance in the microbial communities. In Lake Sarnen, the main components (CPA1 and CPA2) explain 74% of the variance in the microbial communities. The samples are colored and shaped by location.