Fig. 3: Correlations between abiotic and biotic factors at SPOT (≤45 m depth, 15 months of sampling, n = 48).
From: Unexpected microbial rhodopsin dynamics in sync with phytoplankton blooms
A Spearman correlation matrix. The color scale on the right represents the Spearman correlation factor (rho). Asterisks indicate statistically significant correlations p < 0.05. “LNA” and “HNA bacteria” denote Low and High Nucleic Acid bacterial cell counts, respectively. Specific rho (ρ) and p values for the correlations are also shown in Supplementary Data 2. B Linear model of surface rhodopsin concentrations in picoplankton (≤45 m depth, 0.2–3.0 µm microbial size fraction, n = 48) shown as the regression of rhodopsin molecules per mL (left y-axis) and pico moles per liter (right y-axis) against the total heterotrophic bacteria abundances measured with flow cytometry. Rhodopsin molecules per milliliter were calculated applying the Avogadro number conversion (1 mol equals 6.022 × 1023 molecules). Grey shadings show 95% confidence intervals of the linear model. The green color gradient of the filled circles indicates the total concentration of chlorophyll-a and serves as a visual measure of the water’s productivity for each data point. Source data are provided as a Source Data file.
