Table 1

Relative fluorescence units of freshwater samples in South East Queensland, Australia, for the 0.2-μm filtrate, control (VFW), and the 10-nm to 200-nm size fractions, along with the percentage of the bulk fluorescence that was nonviral fluorescencea

Freshwater sample sourceLatitude and longitudeNo. of RFU (no. of viruses) in:% of bulk fluorescence not viral DNAVirus concn (× 107 · ml−1) (no. of viruses)
0.2-μm filtrate (bulk fluorescence)Control (VFW)10- to 200-nm size fractions less control (viral DNA)
Brook28°8′23.13″S 152°34′24.39″E24.1413.176.96725.70 ± 0.37 (10)
Creek26°20′47.74″S 152°39′19.49″E27.47 ± 0.36 (3)10.40 ± 1.40 (3)3.93 ± 0.36 (3)862.95 ± 0.51 (30)
Creek26°11′0.70″S 152°31′39.40″E37.68 ± 1.50 (2)8.969.39 ± 0.02 (2)754.31 ± 0.39 (20)
Creek28°0′41.37″S 152°33′23.51″E54.01 ± 10.68 (2)8.9616.80 ± 3.44 (2)6912.18 ± 2.41 (20)
River26°30′31.28″S 152°57′24.37″E54.098.9610.83804.49 (10)
  • a Viral abundance determined using SYBR stain and epifluorescence microscopy is also included. Means and standard errors are shown.