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Table 1 Physicochemical and biological characteristics of the sampling sites (2 m depth)

From: Effect of grazers and viruses on bacterial community structure and production in two contrasting trophic lakes

Parameters   LA1 LA2 LB1 LB2
Sampling date   26/03/2007 10/07/2007 02/04/2007 17/07/2007
Temperature °C 6.2 19.6 7.5 20.4
DO mg l-1 10.5 9.7 11.7 10
TOC mg l-1 1.7 2.2 2.1 2.5
NO3 mg l-1 0.2 0.1 0.5 0.2
NH4 μg l-1 2.0 1.0 6.0 4.0
PO4 μg l-1 2.0 3.0 4.0 2.0
P total μg l-1 7.0 6.0 21.0 6.0
Chla μg l-1 0.7 2.7 1.2 0.7
Cyanobacteria 104 cell ml-1 9.0 ± 0.5 15.0 ± 1.1 2.0 ± 0.1 12.0 ± 0.8
Het. Bacteria 105 cell ml-1 24.4 ± 0.3 12.3 ± 0.4 35.0 ± 1.2 25.2 ± 2.0
Viruses 107 part ml-1 3.7 ± 0.1 5.1 ± 0.4 8.3 ± 0.3 15.3 ± 0.7
HNF 102 cell ml-1 7.5 ± 1.3 6.9 ± 0.6 2.6 ± 1.3 3.9 ± 1.5
PNF 102 cell ml-1 4.9 ± 1.3 18.0 ± 3.1 1.4 ± 0.2 2.9 ± 0.5
  1. DO, dissolved oxygen; Chl a, Chlorophyll a; TOC, total organic carbon; NO3, nitrate; NH4, ammonium; P total, total phosphorus; Het. Bacteria, heterotrophic bacteria; HNF, heterotrophic nanoflagellates; PNF, pigmented nanoflagellates. LA1, March sampling in Lake Annecy; LA2, July sampling in Lake Annecy; LB1, April sampling in Lake Bourget; LB2, July sampling in Lake Bourget. Values are means ± standard deviation of results from triplicate measurements.