Fig. 3: Changes in community (S. marinoi and T. baltica strains) density (A) measured as relative chlorophyll a fluorescence units (RFU) and maximum quantum yield of photosystem II (B) during the competition experiment.
From: Intraspecific variation in metal tolerance modulate competition between two marine diatoms
The community was semicontinuously diluted to 0.003 RFU before the end of exponential growth which occurs at 0.5 RFU in S. marinoi (which dominated the control) and 0.08 in T. baltica. Linear mixed effects models of FV/FM identified significant differences between Metals (F(3,12), p < 0.0001), Time (F(6,72), p < 0.0001) and an interaction Metal × Time (F(18,72), p < 0.0001). Metal names at the bottom of (B) indicate statistical differences relative to the control, based on post hoc test (p < 0.05). Error bars show S.D. (N = 4), and when error bars are not visible, they are confined within the symbols.
