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. 2020 Sep 10;11:521146. doi: 10.3389/fmicb.2020.521146

FIGURE 2.

FIGURE 2

Correlation matrix including the physicochemical and environmental variable values and the presence of Salmonella. The correlogram represents the correlation for all pairs of variables. Positive correlations are displayed in blue and negative correlations in red. The intensity of the color is proportional to the correlation coefficient, so the stronger the correlation (i.e., the closer to −1 or 1), the darker the boxes. “*” indicates significant Pearson correlation (p < 0.05). The color legend on the right side of the correlogram shows the correlation coefficients and the corresponding colors. WT, water temperature; DO, dissolved oxygen; CON, electrical conductivity; TUR, turbidity; TA, air temperature; HUM, relative humidity; PREC, rainfall, and SAL, Salmonella.