Figure 3
From: Evidence for signatures of ancient microbial life in paleosols
Observed changes of richness, evenness, DNA content [ng g−1 dry soil] and bacterial 16S rRNA gene copy number per g dry soil with increasing soil depth. Values for observed OTUs, Chao1 index and copy number are log10 scaled on the x-axis. The color code indicates horizons with different soil development and climate stages, likewise as used in Fig. 2.
