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

BMC Microbiology

Table 3 Bacterial growth rate (r), loss rate, virus-induced mortality and lysis activity rates after 48 h and 96 h

Experiment/Treatment	Growth rate (r) (d^-1)		Loss rate of bacteria (d^-1)				Lysis mortality (d^-1)		Lysis rate activity (10⁵cell ml^-1d^-1)
	48 h	96 h	48 h		96 h		48 h	96 h	48 h	96 h
LA1
VFA	0.12 ± 0.05	0.14 ± 0.01	-0.03 ± 0.09		-0.06 ± 0.04		0.18 ± 0.01	0.21 ± 0.01	3.90 ± 0.16	4.60 ± 0.04
VF	0.09 ± 0.06	0.10 ± 0.06	0.01 ± 0.04		-0.02 ± 0.01		0.18 ± 0.01	0.22 ± 0.01	3.80 ± 0.07	4.80 ± 0.12
V	0.09 ± 0.06	0.08 ± 0.05					0.18 ± 0.01	0.19 ± 0.01	3.70 ± 0.05	4.10 ± 0.04
LA2
VFA	0.30 ± 0.10	0.37 ± 0.03	-0.02 ± 0.15		-0.08 ± 0.05	*	0.39 ± 0.01	0.41 ± 0.02	4.20 ± 0.14	4.40 ± 0.14
VF	0.36 ± 0.36	0.39 ± 0.01	-0.08 ± 0.05		-0.09 ± 0.05	*	0.40 ± 0.05	0.40 ± 0.02	4.20 ± 0.49	4.20 ± 0.14
V	0.28 ± 0.03	0.47 ± 0.04					0.37 ± 0.02	0.44 ± 0.01	3.50 ± 0.20	4.10 ± 0.07
LB1
VFA	0.27 ± 0.02	0.28 ± 0.01	-0.09 ± 0.01	**	-0.10 ± 0.02	**	0.20 ± 0.01	0.21 ± 0.01	6.40 ± 0.05	7.10 ± 0.09
VF	0.27 ± 0.00	0.23 ± 0.00	-0.05 ± 0.01	**	-0.05 ± 0.01	**	0.22 ± 0.01	0.22 ± 0.01	7.20 ± 0.11	7.20 ± 0.03
V	0.18 ± 0.01	0.18 ± 0.01					0.16 ± 0.01	0.18 ± 0.01	5.30 ± 0.20	5.60 ± 0.08
LB2
VFA	0.68 ± 0.10	0.73 ± 0.01	-0.21 ± 0.01	*	-0.22 ± 0.02	**	1.62 ± 0.19	2.20 ± 0.08	34.9 ± 4.30	47.4 ± 1.83
VF	0.65 ± 0.02	0.62 ± 0.01	-0.18 ± 0.12	*	-0.11 ± 0.01	**	1.32 ± 0.31	1.94 ± 0.03	28.4 ± 6.40	41.7 ± 0.26
V	0.47 ± 0.10	0.51 ± 0.01					1.01 ± 0.04	1.77 ± 0.09	21.1 ± 0.96	36.8 ± 1.75

The significant difference between bacterial growth rate in V treatment and VFA/VF treatments was tested using ANOVA. *, P < 0.05; **, P < 0.001.

ISSN: 1471-2180