Table 3.

Uptake and clearance rates of flagellates for the different size classes of FLB

FLB source [reference(s)]FLB cell length (μm)FLB cell vol (μm3)aUptake rateb (bacteria · protist−1 · h−1)Clearance rate (nl · protist−1 · h−1)
Contaminated aquifer (this study)0.1–0.50.06 ± 0.010.060.1
0.5–0.80.14 ± 0.020.130.33
0.8–1.50.21 ± 0.020.771.4
>1.50.87 ± 0.050.040.2
Contaminated aquifer (columns) (31)1–2312
Rivers (2,16)c 1.1–90.40.2–8.9
Lakes (4, 25,41)c 2–1810.2–44
Marine (16 47)c 5.2–27.41.4–4.3
Estuarine (17, 42,45)c 0.32–3.2
  • a Values are means ± standard errors.

  • b Calculated by using the clearance rate of FLB and the total bacterial concentration of each size class present during grazing experiments.

  • c The values from these references represent a range of experiments conducted by several researchers at various temperatures with various sizes of FLB and flagellates.