Fig. 4

Abundance of the total bacterial and fungal community in different samples isolated from natural DCXC. The error bars indicate SDs (n = 3), with some error bars smaller than the symbol. Samples containing a different letter indicate that there were significant differences (p < 0.05). The unit of abundance was the log value of the gene copies per gram of dry materials. The moisture content of each sample was measured by gravimetric analysis after oven-drying (105 °C) of triplicate samples