Presence and abundance of bacteria with the Type VI secretion system in a coastal environment and in the global oceans
Fig 5
RDA analysis showing the association of T6SS reads (in rpm) and environmental variables from the TARA Oceans metagenome samples.
Colored circles represent T6SS vgrG and hcp gene reads from eight bacterial genera. Six environmental variables that contributed to the variation of the global T6SS reads were plotted and these include number of autotroph cells (cells/ml), nitrite-nitrate (NO2+NO3, μM), oxygen concentration (O2, μmol/kg), bacterial functional richness (Tax. Rich.) and water sample depth (Depth, meters). Arrow length represents strength of the relationship of each environmental parameter to the composition of T6SS-bearing bacteria. * indicates significant environmental variable (p < 0.005).