FIG. 1.

Uptake of FLB by 2- to 3-μm aquifer nanoflagellates during the grazing experiments. Error bars represent standard errors of the mean and total experimental variability. Coefficients of determination (r² values) for linear regressions fitted to 0- to 4-h data were 0.80 (for the 0.1- to 0.5-μm size class), 0.87 (0.5 to 0.8 μm), 0.98 (0.8 to 1.5 μm), and 0.93 (>1.5 μm). The inset shows clearance rates for each size class of FLB based on uptake rates observed during the first 4 h of the grazing experiments. prot, protist.