Figure 1.
Plot showing the top four bacterial taxa in each sample based on the mean value of relative OTU abundance in pristine and contaminated communities.
For the sample labels, the first two uppercase letters are site names abbreviation, followed by lowercase alphabet “b” and “p” specified the bottom active layer and upper permafrost, and last numeric suffix “0” or “3” indicates innate soils (without pollutants) and 30% (v/w) treatment, respectively.
Figure 2.
The dominant families in the pristine and oily bacterial communities in each sample.
The dot size is proportion to the relative abundance of each family. Family names with average abundance higher than 5% were showed.
Figure 3.
The dominant genera in the clean and oiled bacterial communities in each sample.
The size of dots is corresponding to the abundance of each bacterial genus. Names of the genera with average abundance greater than 5% were only showed.
Figure 4.
Pheatmap showing the top 50 genera detected in the baterial libraries based on the bray-curtis distance.
Figure 5.
Correspondence analysis (CA) (left) and non-metric multidimensional scaling (NMDS) ordination (right) for bacterial communities of both innate and contaminated samples.
Note: The configuration of NMDs was rotated to have the greatest variation along the first axis.