Table 1

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

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


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.

Berdjeb et al. BMC Microbiology 2011 11:88   doi:10.1186/1471-2180-11-88

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