Figure 3

Differences in phylogroup composition of E. coli among locations. (a) Spatial distribution of the phylogenetic composition in the sampled locations; pie charts indicating the relative frequency of the phylogenetic groups; (b) Violin plot of the relative abundance of the phylogenetic groups. Filled dots represent the relative abundance at each site; crosses indicate the means; (c) Correlogram of Pearson’s correlations between Simpson’s dominance index (D), diversity of E. coli phylogroups, and mean E. coli abundance. Significance levels of Pearson’s correlation: *p < 0.05, **p < 0.001. Base map created in Google Earth V 7.3.3.7786. (October 5, 2020). Buenos Aires Metropolitan Area, Argentina. 34°46ʹ47.32ʺS, 58°19ʹ27.95ʺO, Eye alt 47.5 km. Maxar Technologies 2020. http://www.earth.google.com. Data analysis performed in R software73. Graphical edition in Inkscape V 0.92.4. Inkscape Project (2020). https://inkscape.org.